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Lotus-stalk Bi4Ge3O12 as binder-free anode for lithium and sodium ion batteries
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作者 Jianlong Xu Wei Wei +2 位作者 Xu Zhang Lei Liang Maotian Xu 《中国化学快报:英文版》 SCIE CAS CSCD 2019年第6期1341-1345,共5页
Alloyed-type anode materials with high-energy density for lithium and sodium ion batteries attracted much attention of the researchers. However, substantial volume expansion of these materials in the devices during re... Alloyed-type anode materials with high-energy density for lithium and sodium ion batteries attracted much attention of the researchers. However, substantial volume expansion of these materials in the devices during repeated electrochemical process leads to fast capacity fading and hinders their further practical application. Nanotechnology could act as a useful tool to effectively address the issue. Herein, lotus-stalk Bi4Ge3O12 nanosheets vertically grown on the nickel foam (denoted as Bi4Ge3O12 NSs@NF) were prepared via a straight-forward solvothermal method. Benefiting from their three dimensional (3D) conductive framework and two dimensional (2D) lotus-stalk Bi4Ge3O12 nanosheet structure, as anode materials of lithium-ion batteries (LIBs) and sodium-ion batteries (NIBs), the electrochemical performances of Bi4Ge3O12 NSs@NF were greatly enhanced as a result of mitigating the huge volume variations during cycles. The Bi4Ge3O12 NSs@NF electrodes delivered a high reversible capacity of 1033.1 mAh/g for the first cycle and exhibited 68.6%capacity retention of after 88 cycles at 0.10 A/g in the voltage window of 0.01~3.0 V versus Li/Li+. In the test of NIBs, the lotus-stalk Bi4Ge3O12 composite electrodes still stored Na+as high as 332.3 mAh/g at 0.10 A/g over 100 sodiation/desodiation repeating cycles. 展开更多
关键词 Bi4Ge3O12 NANOSHEETS LITHIUM-ION battery Sodium-ion BATTER ANODE
Molybdenum and tungsten chalcogenides for lithium/sodium-ion batteries: Beyond MoS2 预览
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作者 Junda Huang Zengxi Wei +3 位作者 Jiaqin Liao Wei Ni Caiyun Wang Jianmin Ma 《能源化学:英文版》 SCIE EI CAS CSCD 2019年第6期100-124,共25页
Molybdenum and tungsten chalcogenides have attracted tremendous attention in energy storage and conversion due to their outstanding physicochemical and electrochemical properties.There are intensive studies on molybde... Molybdenum and tungsten chalcogenides have attracted tremendous attention in energy storage and conversion due to their outstanding physicochemical and electrochemical properties.There are intensive studies on molybdenum and tungsten chalcogenides for energy storage and conversion,however,there is no systematic review on the applications of WS2,Mo Se2and WSe2as anode materials for lithium-ion batteries(LIBs)and sodium-ion batteries(SIBs),except Mo S2.Considering the importance of these contents,it is extremely necessary to overview the recent development of novel layered WS2,Mo Se2and WSe2beyond Mo S2in energy storage.Here,we will systematically overview the recent progress of WS2,Mo Se2and WSe2as anode materials in LIBs and SIBs.This review will also discuss the opportunities,and perspectives of these materials in the energy storage fields. 展开更多
关键词 MoSe2 WS2 WSe2 LITHIUM-ION BATTERIES Sodium-ion BATTERIES
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High-energy Mn-based layered cathodes for sodium-ion batteries
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作者 Shaohua Guo Haoshen Zhou 《科学通报:英文版》 SCIE EI CSCD 2019年第3期149-150,共2页
Sodium-ion batteries (SIBs) have great potential in large-scale energy storage applications due to the low cost and abundance of sodium resources (1,2)However, some critical issues, such as low energy density and infe... Sodium-ion batteries (SIBs) have great potential in large-scale energy storage applications due to the low cost and abundance of sodium resources (1,2)However, some critical issues, such as low energy density and inferior cycling performance, definitely hinder the practical application of SIBs, in part because of the bigger and heavier Na ion in contrast with the Li ion as an energy carrier (3)Recently, a surge of attention has been paid to the Mnbased materials due to the earth abundant and environmentally friendly manganese element [4,5]. 展开更多
关键词 Mn HIGH-ENERGY Mn-based LAYERED cathodes for sodium-ion batteries
Iron sulfides with dopamine-derived carbon coating as superior performance anodes for sodium-ion batteries
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作者 Aihua Jin Seung-Ho Yu +5 位作者 Jae-Hyuk Park Seok Mun Kang Mi-Ju Kim Tae-Yeol Jeon Junyoung Mun Yung-Eun Sung 《纳米研究:英文版》 SCIE EI CAS CSCD 2019年第10期2609-2613,共5页
High energy ball-milled iron sulfides with thin carb on layer coati ng(BM-FeS/C composites)were prepared by the simple and econo mical process.Ball-milled process,followed by carb on coati ng,reduced the particle size... High energy ball-milled iron sulfides with thin carb on layer coati ng(BM-FeS/C composites)were prepared by the simple and econo mical process.Ball-milled process,followed by carb on coati ng,reduced the particle size and increased the electrical con ductivity.Whe n employed as sodium-ion battery ano des,BM・F eS/C composites showed extremely high electrochemical performa nee with reversible specific capacity of 589.8 mAh·g^-1 after 100 cycles at a current density of 100 mA·g^-1.They also exhibited superior rate capabilities of 375.9 mAh·g^-1 even at 3.2 Ag~1 and 423.6 mAh·g^-1 at 1.5 Ag_1.X-ray absorptio n near edge structure an alysis con firmed the electrochemical pathway for con version reaction of BM-FeS/C composites. 展开更多
关键词 sodium-ion batteries iron sulfides high energy ball-milling DOPAMINE X-ray absorption near edge structure
A new Tin-based O3-Na0.9[Ni0.45-x/2MnxSn0.55-x/2]O2 as sodium-ion battery cathode 预览
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作者 Xiaohui Rong Xingguo Qi +8 位作者 Yaxiang Lu Yuesheng Wang Yunming Li Liwei Jiang Kai Yang Fei Gao Xuejie Huang Liquan Chen Yong-Sheng Hu 《能源化学:英文版》 SCIE EI CAS CSCD 2019年第4期132-137,共6页
Recently,sodium-ion batteries (SIBs),regarded as promising supplements for lithium-ion batteries (LIBs),especially in the large-scale energy storage field,are attracting more and more attention.However,the limited sui... Recently,sodium-ion batteries (SIBs),regarded as promising supplements for lithium-ion batteries (LIBs),especially in the large-scale energy storage field,are attracting more and more attention.However,the limited suitable cathode materials hinder the wide commercialization of SIBs.Given this aspect,in this work,a new layered oxide with 4d metal Tin was synthesized and investigated as cathode material for SIBs.Two optimized sodium-deficient 03-Na0.9Ni0.45Sn0.55O2 and O3-Nd0.9Ni0.4Mn0.1Sn0.5O2 were selected for comprehensive investigation,both of which exhibited high operating voltage of around 3.45 V with smooth charge/discharge curves.In comparison,O3-Na0.9Ni0.4Mn0.1Sn0.5O2 shows a higher reversible capacity (65 mAh/g,0.1 C),better rate capability and cycling stability than that of O3-Na0.9Ni0.45Sn0.55O2 (50mAh/g,0.1C),indicating that a small amount: of Mn-substitution can improve the electrochemical performa nee.This work presents a new possibility of discoven ng potential cathode candidates by exploring the Tin-based layered oxides. 展开更多
关键词 Sodium-ion batteries Layered oxide CATHODE Tin-based CATHODE
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Triple effects of Sn-substitution on Nao.67Nio.33Mno.67O2
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作者 Xiaohui Rong Fei Gao +6 位作者 Feixiang Ding Yaxiang Lu Kai Yang Hong Li Xuejie Huang Liquan Chen Yong-Sheng Hu 《材料科学技术学报:英文版》 SCIE EI CAS CSCD 2019年第7期1250-1254,共5页
Layered oxides are one of the most prom ising cathode materials for sodium ion batteries (NIBs), however, the relatively low working voltage hinders the increase of energy density thus limiting the application scenari... Layered oxides are one of the most prom ising cathode materials for sodium ion batteries (NIBs), however, the relatively low working voltage hinders the increase of energy density thus limiting the application scenarios of NIBs. Here we prepared and investigated a series of Sn^4+ substituted NaO.67NiO.33M na67-xSnxO2 (x = 0.10, 0.20, 0.30, 0.33) and found that Sn-substitution can induce three effects: promoting O3-stack formation, sm oothing the voltage profile and increasing the working voltage to -3.6 V. This study would enrich the knowledge of Sn-substitution and give guide to the better design of high-voltage cathode materials for NIBs. 展开更多
关键词 Sodium-ion batteries LAYERED oxide CATHODE Tin-based CATHODE
From Jackfruit Rags to Hierarchical Porous N-Doped Carbon:A High-Performance Anode Material for Sodium-Ion Batteries 预览
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作者 Baisheng Zhao Yichun Ding Zhenhai Wen 《天津大学学报:英文版》 EI CAS 2019年第5期429-436,共8页
Renewable biomass-derived carbon materials have attracted increasing research attention as promising electrode materials for electrochemical energy storage devices, such as sodium-ion batteries (SIBs), due to their ou... Renewable biomass-derived carbon materials have attracted increasing research attention as promising electrode materials for electrochemical energy storage devices, such as sodium-ion batteries (SIBs), due to their outstanding electrical conductivity, hierarchical porous structure, intrinsic heteroatom doping, and environmental friendliness. Here, we investigate the potential of hierarchical N-doped porous carbon (NPC) derived from jackfruit rags through a facile pyrolysis as an anode material for SIBs. The cycling performance of NPC at 1 A/g for 2000 cycles featured a stable reversible capacity of 122.3 mA h/g with an outstanding capacity retention of 99.1%. These excellent electrochemical properties can be attributed to the unique structure of NPC;it features hierarchical porosity with abundant carbon edge defects and large speci c surface areas. These results illuminate the potential application of jackfruit rags-derived porous carbon in SIBs. 展开更多
关键词 POROUS CARBON N-DOPED CARBON Sodium-ion battery Anode JACKFRUIT rags Energy storage and conversion
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Precise carbon structure control by salt template for high performance sodium-ion storage 预览
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作者 Dong Qiu Tengfei Cao +6 位作者 Jun Zhang Si-Wei Zhang Dequn Zheng Haoliang Wu Wei Lv Feiyu Kang Quan-Hong Yang 《能源化学:英文版》 SCIE EI CAS CSCD 2019年第4期101-106,共6页
Carbon materials are considered to be one of the most promising anode materials for sodium-ion batteries (SIBs),but the well-ordered graphitic structure limits the intercalation of sodium ions.Besides,the sluggish int... Carbon materials are considered to be one of the most promising anode materials for sodium-ion batteries (SIBs),but the well-ordered graphitic structure limits the intercalation of sodium ions.Besides,the sluggish intercalation kinetics of sodium ions impedes the rate performance.Thus,the precise structure control of carbon materials is im porta nt to improve the battery performance.Herein,a 3D porous hard-soft composite carbon (3DHSC) was prepared using the NaCl as the template and phenolic resin and pitch as carbon precursors.The NaCl template restrains the growth of the graphite crystallite during the carb on izatio n process,resulting in small graphitic domains with expanded interlayer spacing which is favorable for the sodium storage.Moreover,the NaCl templates help to create abundant mesopores and macropores for fast sodium ion diffusion.The porous structure and the graphite crystalline structure can be precisely controlled by simply adjusting the mass ratio of NaCl,and thus,the suitable structure can be prepared to reach high capacity and rate performance while keeping a relatively high Coulombic efficiency.Typically,a high reversible capacity (215mAhg^-1 at 0.05Ag^-1),an excellent rate capability (97 mAhg^-1 at 5 Ag^-1),and a high initial Coulombic efficiency (60%) are achieved. 展开更多
关键词 Sodium-ion batteries Salt-template 3D porous hard-soft composite carbon ANODE Electrochemical performance
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Metal-organic frameworks derived flower-like Co3O4/nitrogen doped graphite carbon hybrid for high-performance sodium-ion batteries
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作者 Haifeng Xu Guang Zhu Baoming Hao 《材料科学技术学报:英文版》 SCIE EI CAS CSCD 2019年第1期100-108,共9页
In this work, a novel flower-like cobalt-based metal organic frameworks(MOFs) self-assembled by Co2+ and nicotinic acid have been designed and synthesized. After a simple annealing treatment, Co3O4 nanoparticles in-si... In this work, a novel flower-like cobalt-based metal organic frameworks(MOFs) self-assembled by Co2+ and nicotinic acid have been designed and synthesized. After a simple annealing treatment, Co3O4 nanoparticles in-situ decorating on nitrogen doped graphite carbon-sheet(Co3O4/NC) were obtained. The resultant Co3O4/NC hybrid with unique flower-like structure and ration combination of Co3O4 nanoparticles and nitrogen doped graphite carbon, endowing the hybrid with enhanced electrical conductivity,short ion diffusion pathways and rich porosity to the materials, which can largely alleviate the problems of Co3O4 such as inferior intrinsic electrical conductivity, sluggish ion kinetics and large volume change upon cycling. When evaluated as anode material for sodium-ion batteries(SIBs), the Co3O4/NC hybrid exhibits satisfied reversible capacity(213.9 mAh g^-1 after 100 cycles at 0.1 A g^-1 ), excellent rate capability(145.4 m Ah g^-1 at 2 A g^-1 and 130.1 mAh g^-1 at 4 A g^-1 ) and robust long-term cycling stability(120.1 m Ah g^-1 after 2000 cycles at 0.5 A g^-1 ), showing great potential for high-performance SIBs. 展开更多
关键词 Co3O4/NC HYBRID METAL-ORGANIC frameworks Sodium-ion batteries HIGH-PERFORMANCE
A high-energy-density sodium-ion full battery based on tin anode
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作者 Mingming Song Chenchen Wang +2 位作者 Dongfeng Du Fujun Li Jun Chen 《中国科学:化学英文版》 SCIE EI CAS CSCD 2019年第5期616-621,共6页
Sodium-ion batteries(SIBs) have been considered as promising candidates for large-scale energy storage, owing to the high abundance and low cost of sodium(Na) resources. However, the development of full SIB has been h... Sodium-ion batteries(SIBs) have been considered as promising candidates for large-scale energy storage, owing to the high abundance and low cost of sodium(Na) resources. However, the development of full SIB has been hindered by low energy density because of the sluggish kinetics of large Na+. Here, we report a full SIB with commercial tin(Sn) anode, cross-linked Na3V2(PO4)3/carbon nanotubes composites(NVP-CNT) cathode, and ether-based electrolyte. Sn is capable of delivering high reversible capacity via formation of Na15 Sn4 and stable solid-electrolyte interface(SEI) in initial cycles. Meanwhile, the NASICON-type NVP enables ultrafast and stable Na+intercalation/extraction, and the incorporation of CNT can improve its electrical conductivity. The assembled full SIB delivers high output voltage of ~3.2 V, high energy density of 253.4 W h kg-1 at1600 W kg-1 based on total mass of both cathode and anode, and remarkable capacity retention of 96.1% after 180 cycles. These merit construction of high-energy full SIBs and will promote the development of SIBs. 展开更多
关键词 sodium-ion BATTERY Sn Na3V2(PO4)3-CNT ether-based electrolyte energy DENSITY
Polydopamine-derived N-doped carbon-wrapped Na3V2(PO4)3 cathode H with superior rate capability and cycling stability for sodium-ion I batteries
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作者 Hyeongwoo Kim Hyojun Lim +3 位作者 Hyung-Seok Kim Ki Jae Kim Dongjin Byun Wonchang Choi 《纳米研究:英文版》 SCIE EI CAS CSCD 2019年第2期397-404,共8页
Na superionic conductor (NASICON)-type Na3V2(PO4)3 (NVP) has been regarded as a promising cathode material for sodium-ion batteries (SIBs). However, NVP suffers from poor cyclability and rate capability because of its... Na superionic conductor (NASICON)-type Na3V2(PO4)3 (NVP) has been regarded as a promising cathode material for sodium-ion batteries (SIBs). However, NVP suffers from poor cyclability and rate capability because of its intrinsically low electronic conductivity. Herein, we successfully syn thesized N-doped carb on-wrapped Na3V2(PO4)3 (NC@NVP) through the carb on izati on of polydopami ne, which is rich in nitrogen species. The strong adhesion properties of the polydopamine lead to effective and homogeneous wrapping of NVP particles, and it I is further turned into a con ductive N-doped carb on n etwork itself, providi ng facile diffusi on of electr ons and Na+ i ons duri ng battery operation. NC@NVP displays remarkable electrochemical performanee, even under harsh operating conditions, such as a high rate capability (discharge capacity of 70.88, 49.21 mA·h·g^-1 at 50 and 100 C), long-term cycling stability (capacity retention of 94.77% over 1,000 cycles at 20 C), and high-temperature cycling (capacity retention of 92.0% after 500 cycles at 60 ℃). 展开更多
关键词 POLYDOPAMINE N-DOPED carbon Na3V2(PO4)3 CATHODE sodium-ion BATTERIES
V2O5·nH2O nanosheets and multi-walled carbon nanotube composite as a negative electrode for sodium-ion batteries 预览
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作者 Ahmed S. Etman Junliang Sun Reza Younesi 《能源化学:英文版》 SCIE EI CAS CSCD 2019年第3期145-151,共7页
Two dimensional (2D) transition metal oxides and chalcogenides demonstrate a promising performance in sodium-ion batteries (SIBs) application. In this study, we investigated the use of a composite of freeze dried V2O5... Two dimensional (2D) transition metal oxides and chalcogenides demonstrate a promising performance in sodium-ion batteries (SIBs) application. In this study, we investigated the use of a composite of freeze dried V2O5·nH2O nanosheets and multi-walled carbon nanotube (MWCNT) as a negative electrode mate-rial for SIBs. Cyclic voltammetry (CV) results indicated that a reversible sodium-ion insertion/deinsertion into the composite electrode can be obtained in the potential window of 0.1–2.5 V vs. Na+/Na. The com-posite electrodes delivered sodium storage capacities of 140 and 45 mAh g^-1 under applied current den-sities of 20 and 100 mA g^-1, respectively. The pause test during constant current measurement showed a raise in the open circuit potential (OCP) of about 0.46 V, and a charge capacity loss of ~10%. These val-ues are comparable with those reported for hard carbon electrodes. For comparison, electrodes of freeze dried V2O5·nH2O nanosheets were prepared and tested for SIBs application. The results showed that the MWCNT plays a significant role in the electrochemical performance of the composite material. 展开更多
关键词 Sodium-ion batteries ANODE MATERIALS VANADIUM pentoxide NANOSHEETS Composite MATERIALS
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钛酸钠纳米管-碳复合材料用作钠离子电容电池负极材料 预览
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作者 赵立平 陶科宇 +1 位作者 王宏宇 齐力 《应用化学》 CSCD 北大核心 2018年第10期1264-1270,共7页
以二氧化钛、氢氧化钠溶液和葡萄糖作为初始原料,通过水热方法合成了钛酸钠纳米管-碳复合材料。使用XRD和TEM等方法测试了材料的结晶情况和形貌,通过氮气吸-脱附和热重实验测试了材料的孔结构和碳含量。采用复合材料作为负极材料,和... 以二氧化钛、氢氧化钠溶液和葡萄糖作为初始原料,通过水热方法合成了钛酸钠纳米管-碳复合材料。使用XRD和TEM等方法测试了材料的结晶情况和形貌,通过氮气吸-脱附和热重实验测试了材料的孔结构和碳含量。采用复合材料作为负极材料,和石墨正极材料配伍,组装成不对称型电容电池,在钠基有机系电解液中其电压可高达3.5V。探讨了负极材料的储能机理,并考察了正负极质量比对负极储钠容量的影响。电化学性能测试结果显示,电容电池具有较高能量密度和功率密度,其数值分别为72Wh/Kg和1256W/Kg,电容电池也表现出了较好的循环稳定性,在0.17A/g电流密度下,经1000次循环后容量保持率高达100%。 展开更多
关键词 钛酸钠纳米管 石墨 钠离子 电容电池 负极材料
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A fast synthetic strategy for high-quality atomically thin antimonene with ultrahigh sonication power
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作者 Wanzhen Lin Yaping Lian +3 位作者 Guang Zeng Yanyan Chen Zhenhai Wen Huanghao Yang 《纳米研究:英文版》 SCIE EI CAS CSCD 2018年第11期5968-5977,共10页
Recent theoretical studies revealed that two-dimensional (2D) antimonene hasattractive characteristics, such as superior photothermal conductivity, absorptionover a wide range, high mobility, and good spintronic pro... Recent theoretical studies revealed that two-dimensional (2D) antimonene hasattractive characteristics, such as superior photothermal conductivity, absorptionover a wide range, high mobility, and good spintronic properties. Herein, we reporta reliable liquid phase exfoliation (LPE) route for the preparation of high-qualityhigh-stability atomically thin (AT) antimonene via high ultrasonic power. TheAT antimonene delivers a high specific capacity of up to 860 mA.h.g-1, with highrate capability and good cycling stability as an anode of a sodium ion battery(SIB). The good conductivity and 2D structure endow AT antimonene with moreactive sites for sodium storage, a facilitated pathway for electron transfer andmass transport, and the capability to reduce the volume expansion during thedischarge-charge process. 展开更多
关键词 antimonene atomically THIN liquid phase EXFOLIATION ATOMIC force MICROSCOPY sodium-ion BATTERIES
Materials based on group IVA elements for alloying-type sodium storage
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作者 Xiaocui Zhu Menglei Sun +1 位作者 Jiangfeng Ni Liang Li 《中国科学:化学英文版》 SCIE EI CAS CSCD 2018年第12期1494-1502,共9页
There are five elements in group IVA of the periodic table,i.e.,carbon (C),silicon (Si),germanium (Ge),tin (Sn)and lead (Pb),of which Si,Ge,and Sn can be used as alloying-type electrode materials for sodium-ion batter... There are five elements in group IVA of the periodic table,i.e.,carbon (C),silicon (Si),germanium (Ge),tin (Sn)and lead (Pb),of which Si,Ge,and Sn can be used as alloying-type electrode materials for sodium-ion batteries.Pb is also capable of alloying with sodium,but it is generally ruled out as the cause of toxicity.In recent years,materials based on Si,Ge,and Sn have been intensively exploited as sodium anodes because of their abundant resource and large capacity with reasonable working voltages. However,successful deployment of these anode materials needs to overcome kinetic and thermodynamic issues related to poor electrochemical activity,particle pulverization associated with large volume swelling,and formation of unstable solid-electrolyte interphase.A diversity of material strategies has been employed to address these difficulties,mainly leveraging on the knowledge recently advanced for lithium anodes.This review highlights such issues and provides valuable insights for possible solutions,which serves as a guide and inspiration for future material innovation for rechargeable batteries. 展开更多
关键词 silicon GERMANIUM tin alloy ANODE sodium-ion BATTERY
Yolk-shell-structured (Feo.sNio.s)9S8 solid-solution powders:Synthesis and application as anode materials for Na-ionbatteries
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作者 Jung Hyun Kim Yun Chan Kang 《纳米研究:英文版》 SCIE EI CAS CSCD 2017年第9期3178-3188,共11页
Multicomponent metal sulfide materials with a yolk-shell structure and a singlephase were studied for the first time as anode materials for sodium-ion batteries.Yolk-shell-structured Fe-Ni-O powders with a molar ratio... Multicomponent metal sulfide materials with a yolk-shell structure and a singlephase were studied for the first time as anode materials for sodium-ion batteries.Yolk-shell-structured Fe-Ni-O powders with a molar ratio of iron and nickelcomponents of 1/1 were prepared via one-pot spray pyrolysis. The preparedFe-Ni--O powders were transformed into yolk-shell-structured (Fe0.sNi0.s)9S8solid-solution powders via a sulfidation process. The initial discharge and chargecapacities of the (Fe0.sNi0.s)9S8 powders at a current density of I A.g-1 were 601 and504 mA-h.g-1, respectively. The discharge capacities of the (Fe0.sNi05)9S8 powdersfor the 2nd and 100~ cycle were 530 and 527 mA.h.g-1, respectively, and theircorresponding capacity retention measured from the 2nd cycle was 99%. The(Fe0.sNi0.5)9S8 powders had high initial discharge and charge capacities at a lowcurrent density of 0.1 A-g-1, and the reversible discharge capacity decreased slightlyfrom 568 to 465 mA.h.g-1 as the current density increased from 0,1 to 5.0 A.g^-1The synergetic effect of the novel yolk-shell structure and the multicomponentsulfide composition of the (Fe0.sNi0.s)9S8 powders resulted in excellent sodium-ionstorage performance. 展开更多
关键词 metal SULFIDE MULTICOMPONENT SULFIDE yolk-shell sodium-ion batteries spray pyrolysis
基于碳包覆磷酸钛钠及活性炭的水系混合超级电容器的研究
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作者 王超强 邱飞龙 +3 位作者 邓瀚 张晓禹 何平 周豪慎 《化学学报》 SCIE CAS CSCD 北大核心 2017年第2期241-246,共6页
本文研究了以碳包覆磷酸钛钠[NaTi2(PO4)3/C]为负极、活性炭(AC)为正极的超级电容器.以柠檬酸为碳源,采用液相法制备前驱物,利用高温固相反应制备得到NaTi2(PO4)3/C纳米颗粒.正负极活性物质质量比值为2.2,组装NaTi2(PO4... 本文研究了以碳包覆磷酸钛钠[NaTi2(PO4)3/C]为负极、活性炭(AC)为正极的超级电容器.以柠檬酸为碳源,采用液相法制备前驱物,利用高温固相反应制备得到NaTi2(PO4)3/C纳米颗粒.正负极活性物质质量比值为2.2,组装NaTi2(PO4)3/C//Na2SO4,/AC钠离子基水系混合超级电容器.电化学性能测试表明,在电压范围0.15~1.4V电流密度为0.5A.g叫的条件下,该电容器的比功率为121.15W·kg,比能量为18.71Wh·kg-1.提升电流密度至10A.g-1,比功率可达2.42kW·kg-1,相应比能量为14.13Wh·kg-1.在1A·g叫的电流密度下,循环1000圈,该电容器的比容量仍保持在初始值的76%.该器件很有希望作为高功率的辅助能量储存设备实现应用. 展开更多
关键词 水溶液 钠离子 混合型超级电容器 磷酸钛钠 活性炭
FeSe2 clusters with excellent cyclability and rate capabilityfor sodium-ion batteries
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作者 Xiujuan Wei Chunjuan Tang +5 位作者 Qinyou An Mengyu Yan Xuanpeng Wang Ping Hu Xinyin Cai Liqiang Mai 《纳米研究:英文版》 SCIE EI CAS CSCD 2017年第9期3202-3211,共10页
Sodium-ion batteries (SIBs) have great promise for sustainable and economicalenergy-storage applications. Nevertheless, it is a major challenge to developanode materials with high capacity, high rate capability, and... Sodium-ion batteries (SIBs) have great promise for sustainable and economicalenergy-storage applications. Nevertheless, it is a major challenge to developanode materials with high capacity, high rate capability, and excellent cyclingstability for them. In this study, FeSe2 clusters consisting of nanorods weresynthesized by a facile hydrothermal method, and their sodium-storage propertieswere investigated with different electrolytes. The FeSe2 clusters delivered highelectrochemical performance with an ether-based electrolyte in a voltage rangeof 0.5-2.9 V. A high discharge capacity of 515 mAh.g-1 was obtained after 400 cyclesat 1 A.g-1, with a high initial columbic efficiency of 97.4%. Even at an ultrahighrate of 35 A-g-1 a specific capacity of 128 mAh.g-1 was achieved. Using calculations,we revealed that the pseudocapacitance significantly contributed to the sodium-ionstorage, especially at high current rates, leading to a high rate capability. Thehigh comprehensive performance of the FeSe2 clusters makes them a promisinganode material for SIBs. 展开更多
关键词 FeSe2 CLUSTERS superior rate capability EXCELLENT CYCLING stability sodium-ion batteries pseudocapacitivebehavior
二硫化钼-碳复合材料用作钠离子电容电池负极材料 预览 被引量:1
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作者 赵立平 孟未帅 +1 位作者 王宏宇 齐力 《物理化学学报》 SCIE CAS CSCD 北大核心 2017年第4期787-794,共8页
采用水热方法合成了二硫化钼-碳复合材料(MoS2—C)。使用X射线衍射,扫描电子显微镜,透射电子显微镜,氮气吸.脱附和热重分析等手段对材料进行了物性表征。研究了MoS2-C储钠机理,将其用作有机系钠离子电容电池负极材料,组装了MoS... 采用水热方法合成了二硫化钼-碳复合材料(MoS2—C)。使用X射线衍射,扫描电子显微镜,透射电子显微镜,氮气吸.脱附和热重分析等手段对材料进行了物性表征。研究了MoS2-C储钠机理,将其用作有机系钠离子电容电池负极材料,组装了MoS2-C/AC电容电池,研究了电容电池的电化学性能。测试结果显示电容电池具有较高比能量和比功率,也表现出了较好的循环稳定性,经1000次循环后容量保持率高达96%。 展开更多
关键词 二硫化钼 活性炭 钠离子 负极材料 电容电池
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三氧化钼/活性炭钠离子电化学电容器 预览 被引量:2
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作者 赵立平 齐力 王宏宇 《应用化学》 CAS CSCD 北大核心 2013年第10期1189-1193,共5页
以三氧化钼(MoO3)作为负极材料,活性炭(AC)作为正极材料,组成混合型电化学电容器。研究了电容器在1mol/LNaPF。的碳酸丙烯酯(Pc)中的电化学性能,其电位窗为0~3V,能量密度和功率密度分别达到33.0W·h/kg和595.6W/kg... 以三氧化钼(MoO3)作为负极材料,活性炭(AC)作为正极材料,组成混合型电化学电容器。研究了电容器在1mol/LNaPF。的碳酸丙烯酯(Pc)中的电化学性能,其电位窗为0~3V,能量密度和功率密度分别达到33.0W·h/kg和595.6W/kg,经1000次循环后容量为第20次的93.8%,库仑效率在经过20次循环后达到95.1%以上。 展开更多
关键词 三氧化钼 活性炭 钠离子 电化学电容器
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