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Dendrite-free all-solid-state lithium batteries with lithium phosphorous oxynitride-modified lithium metal anode and composite solid electrolytes
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作者 Chunhua Wang Guoliang Bai +2 位作者 Yifu Yang Xingjiang Liu Huixia Shao 《纳米研究:英文版》 SCIE EI CAS CSCD 2019年第1期217-223,共7页
Dendrite formation on lithium (Li) metal anode is a key issue which hinders the development of rechargeable Li battery seriously. A novel method for suppress!ng Li dendrites via using Li phosphorous oxynitride (UPON) ... Dendrite formation on lithium (Li) metal anode is a key issue which hinders the development of rechargeable Li battery seriously. A novel method for suppress!ng Li dendrites via using Li phosphorous oxynitride (UPON) modified Li anode and Li1.5Al0.5Ge1.5(PO4)3-poly(ethylene oxide)(Li bistrifluoromethane-sulfonimide)(LAGP-PEO(LiTFSI)) composite solid electrolyte in all-solid-state Li battery is proposed, and the effect of the thickness of UPON on Li anode performarice is also studied. LiPON film with a thickness of 500 nm exhibits satisfactory interface property between Li metal anode and the LAGP-PEO(LiTFSI) solid electrolyte. The LiPON film provides a uniform Li^+ flux across the interface and effectively inhibits the formation of Li dendrites in all-solid-state Li batteries. The assembled all-solid-state Li cell Li(LiPON)/LAGP-PEO(LiTFSI)/LiFePO4 delivers an initial discharge capacity of 152.4 mAh·g^-1 and exhibits good cycling stability and rate performanee at 50 ℃. 展开更多
关键词 LITHIUM metal anode LITHIUM DENDRITES Li phosphorous OXYNITRIDE (LiPON) composite solid electrolyte ALL-SOLID-STATE LITHIUM battery
Infiltrating lithium into carbon doth decorated with zinc oxide arrays for dendrite-free lithium metal anode
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作者 Xianshu Wang Zhenghui Pan +6 位作者 Yang Wu Xiaoyu Ding Xujia Hong Guoguang Xu Meinan Liu Yuegang Zhang Weishan Li 《纳米研究:英文版》 SCIE EI CAS CSCD 2019年第3期525-529,共5页
Lithium metal anode for batteries has attracted extensive attentions, but its application is restricted by the hazardous dendritic Li growth and dead Li formation. To address these issues, a novel Li anode is develope... Lithium metal anode for batteries has attracted extensive attentions, but its application is restricted by the hazardous dendritic Li growth and dead Li formation. To address these issues, a novel Li anode is developed by infiltrating molten Li metal into conductive carbon cloth decorated with zinc oxide arrays. In carbonate-based electrolyte, the symmetric cell shows no short circuit over 1,500 h at 1 mA·cm^-2, and stable voltage profiles at 3 mA cm^-2 for ~ 300 h cycling. A low overpotential of ~ 243 mV over 350 cycles at a high current density of 10 mA·cm^-2 is achieved, compared to the seriously fluctuated voltage and fast short circuit in the cell using bare Li metal. Meanwhile, the asymmetric cell withstands 1,000 cycles at 10 C (1 C = 167 mAh·g^-1) compared to the 210 cycles for the cell using bare Li anode. The excellent performance is attributed to the well-regulated Li plating/stripping drive n from the formation of LiZn alloy on the wavy carb on fibers, resulting in the suppress!on of dendrite growth and pulverization of the Li electrode during cycling. 展开更多
关键词 LITHIUM metal anodes LITHIUM plating/stripping dendrite-free thermal infiltration CARBON cloth zinc oxide nanowire ARRAYS
高钙油田卤水富锂工艺研究 预览
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作者 潘磊 李龙涛 唐耀春 《无机盐工业》 CAS CSCD 北大核心 2019年第2期42-44,共3页
油田卤水中含有丰富的锂元素。目前,各高新技术领域对碳酸锂原料的需求量日益增长。分别采用兑卤和冷冻结晶/芒硝兑卤复合工艺除去某油田卤水中的Ca^2+,再用纯碱沉锂制备碳酸锂。实验结果表明:冷冻结晶/芒硝兑卤工艺去除卤水中Ca^2+的... 油田卤水中含有丰富的锂元素。目前,各高新技术领域对碳酸锂原料的需求量日益增长。分别采用兑卤和冷冻结晶/芒硝兑卤复合工艺除去某油田卤水中的Ca^2+,再用纯碱沉锂制备碳酸锂。实验结果表明:冷冻结晶/芒硝兑卤工艺去除卤水中Ca^2+的效果较冷冻结晶工艺佳,冷冻结晶/兑卤复合工艺从高钙油田卤水中制备所得碳酸锂中主含量可达96.73%(质量分数)。 展开更多
关键词 油田卤水 碳酸锂
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江陵地下卤水富集锂的变化规律研究 预览
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作者 陈侠 陈洁 +1 位作者 苗淑兰 廖恩鑫 《无机盐工业》 CAS CSCD 北大核心 2019年第7期51-54,共4页
地下卤水、盐湖卤水及矿石中含有丰富的锂资源,锂的提取多从前两者中进行,所以需要对此进行合理的开发利用。主要对湖北江陵地下卤水蒸发浓缩过程中锂离子浓度的变化规律进行研究。首先对江陵地下卤水浓缩过程中的析盐规律和锂离子浓度... 地下卤水、盐湖卤水及矿石中含有丰富的锂资源,锂的提取多从前两者中进行,所以需要对此进行合理的开发利用。主要对湖北江陵地下卤水蒸发浓缩过程中锂离子浓度的变化规律进行研究。首先对江陵地下卤水浓缩过程中的析盐规律和锂离子浓度变化规律分别进行研究。蒸发浓缩江陵地下卤水对其进行常量化学组成分析和锂离子浓度的测定。实验结果表明,氯化钠浓度随着蒸发率的增大先增大再减少,氯化钾浓度随着蒸发率的增大而增大。在蒸发率为34.80%时,氯化钠开始析出;在蒸发率为66.10%时,氯化钾开始析出。锂离子浓度随着蒸发率的增大而增大。确定析钾点并测出母液中各离子含量,继续蒸发母液研究浓缩过程中锂离子浓度的变化规律,为今后从江陵地下卤水中提取锂提供了基础数据。 展开更多
关键词 地下卤水 蒸发浓缩 母液 结晶
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Anionic polymerization initiated by lithium amides for preparing high molecular weight polyacrylonitrile
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作者 Xiaolin Shi Jingyang Jiang 《中国化学快报:英文版》 SCIE CAS CSCD 2019年第2期473-476,共4页
Lithium amides have been proved to be effective anionic initiators for the anionic polymerization of acrylonitrile to get high molecular weight polyacrylonitrile in this study. Polyacrylonitrile with weightaverage mol... Lithium amides have been proved to be effective anionic initiators for the anionic polymerization of acrylonitrile to get high molecular weight polyacrylonitrile in this study. Polyacrylonitrile with weightaverage molecular weight ranging from 1.02 × 10~6 g/mol to 1.23 ×10~6 g/mol (M_w/M_n= 1.9-2.2) could be prepared utilizing lithium amides derived from diisopropylamine, diethylamine, hexamethyldisilazane,dicyclohexylamine, and 2,2,6,6-tetramethylpiperidine as initiators. The polymerization of acrylonitrile proceeded in a homogeneous manner in N,N-di methyl for mamide and insignificant contribution of side reactions was confirmed. 展开更多
关键词 ANIONIC POLYMERIZATION ACRYLONITRILE High molecular weight polymer Lithium AMIDES POLYACRYLONITRILE
Monolithic LiF or MgF2 lens-window-prism device for coherent 10.7 eV beam source with 1 MHz repetition rate
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作者 赵智刚 黒田健太 +3 位作者 原沢すゆみ 迟藤猛 辛埴 小林洋平 《中国光学快报:英文版》 SCIE EI CAS CSCD 2019年第5期53-56,共4页
A monolithic lens-window-prism (LWP) device, made of lithium fluoride (LiF) or magnesium fluoride (MgF2), was proposed. When either of the devices was fixed onto one end of a gas cell filled with Xe, it becomes a uwed... A monolithic lens-window-prism (LWP) device, made of lithium fluoride (LiF) or magnesium fluoride (MgF2), was proposed. When either of the devices was fixed onto one end of a gas cell filled with Xe, it becomes a uwedge-crystal”-like device and was used to convert a 1 MHz femtosecond 347 nm laser to its third harmonic radiation at 10.7 eV. This led to an improved beam profile and a more compact and less lossy configuration. A stable output power of ~11μW was demonstrated for 2 h using LiF-LWP. In addition, MgF2-LWP was also verified for its practicability at 10.7 eV. 展开更多
关键词 lens-window-prism(LWP) lithium fluoride(LiF) magnesium fluoride(MgF2)
Improved hydrogen storage properties of LiBH4 confined with activated charcoal by ball milling
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作者 He Zhou Xin-Hua Wang +2 位作者 Hai-Zhen Liu Shi-Chao Gao Mi Yan 《稀有金属:英文版》 SCIE EI CAS CSCD 2019年第4期321-326,共6页
In order to enhance the hydrogen storage properties of LiBH4,activated charcoal (AC) was used as the scaffold to confine LiBH4 in this paper.Ball milling was used to prepare LiBH4/AC composites.Experimental results sh... In order to enhance the hydrogen storage properties of LiBH4,activated charcoal (AC) was used as the scaffold to confine LiBH4 in this paper.Ball milling was used to prepare LiBH4/AC composites.Experimental results show that dehydrogenation properties of ball-milled LiBH4/AC (LiBH4/AC-BM) are greatly improved compared with that of pristine LiBH4,ball-milled LiBH4 (LiBH4-BM) and hand-milled LiBH4/AC (LiBH4/AC-HM).The onset dehydrogenation temperature of LiBH4 for LiBH4/AC-BM is around 160 ℃,which is 170 ℃ lower than that of pristine LiBH4.At around 400 ℃,LiBH4/AC-BM finishes the dehydrogenation with a hydrogen capacity of 13.6 wt%,which is approximately the theoretical dehydrogenation capacity of pure LiBH4 (13.8 wt%),while the dehydrogenation processes for LiBH4-BM and LiBH4/AC-BM do not finish even when they were heated to 600 ℃.The isothermal dehydriding measurements show that it takes only 15 min for LiBH4/AC-BM to reach a dehydrogenation capacity of 10.1 wt% at 350 ℃,whereas the pristine LiBH4 and the LiBH4/AC-HM release hydrogen less than 1 wt% under the same conditions.The dehydrogenation process and the effect of AC were discussed. 展开更多
关键词 HYDROGEN STORAGE properties HYDROGEN STORAGE materials Lithium BOROHYDRIDE ACTIVATED charcoal
A one-pot protocol for copper-mediated azide–alkyne cycloaddition using alkenyl triflate precursors
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作者 Yu Chen Lianchao Liu +2 位作者 Dimin Wu Yu-Peng He Ang Li 《中国化学快报:英文版》 SCIE CAS CSCD 2019年第1期269-270,共2页
On the basis of the mild transformation of alkenyl triflates into alkynes promoted by LiCl, a one-pot protocol using alkenyl triflate precursors was developed for copper-mediated azide–alkyne cycloaddition. This prot... On the basis of the mild transformation of alkenyl triflates into alkynes promoted by LiCl, a one-pot protocol using alkenyl triflate precursors was developed for copper-mediated azide–alkyne cycloaddition. This protocol may provide an opportunity of sequentially click reactions for the construction of bifunctional probes in chemical biology studies. 展开更多
关键词 CLICK chemistry Azide-alkyne CYCLOADDITION ALKENYL triflates Lithium chloride
Flame-retardant properties of in situ sol-gel synthesized inorganic borosilicate/silicate polymer scaffold matrix comprising ionic liquid
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作者 Kumar Sai SMARAN Rajashekar BADAM +1 位作者 Raman VEDARAJAN Noriyoshi MATSUMI 《能源前沿:英文版》 CSCD 2019年第1期163-171,共9页
This paper focuses on the superiority of organic?inorganic hybrid ion-gel electrolytes for lithiumion batteries(LiBs)over commercial electrolytes,such as 1 M LiPF6 in 1:1 ethylene carbonate(EC):dimethyl carbonate{DMC)... This paper focuses on the superiority of organic?inorganic hybrid ion-gel electrolytes for lithiumion batteries(LiBs)over commercial electrolytes,such as 1 M LiPF6 in 1:1 ethylene carbonate(EC):dimethyl carbonate{DMC){1 M LiPF6-EC:DMC},in terms of their flame susceptibility.These ion-gel electrolytes possess ionic liquid monomers,which are confined within the borosilicate or silicate matrices that are ideal for nonflammability.Naked flame tests confirm that the organicinorganic hybrid electrolytes are less susceptible to flames,and these electrolytes do not suffer from a major loss in terms of weight.In addition,the hybrids are self-extinguishable.Therefore,these hybrids are only oxidized when subjected to a flame unlike other commercial electrolytes used in lithium-ion batteries.Supplementary analyses using differential scanning calorimetric studies reveal that the hybrids are glassy until the temperature reaches more than 100℃.The current results are consistent with previously published data on the organic-inorganic hybrids. 展开更多
关键词 INORGANIC polymeric BOROSILICATE network ORGANIC-INORGANIC HYBRIDS self-extinguishability non flammability lithium batteries flame-retardants
烧结剂对新疆粉煤灰中锂浸出的作用特性 预览
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作者 董卉 陈娟 +1 位作者 李箫玉 邵莉 《化工进展》 EI CAS CSCD 北大核心 2019年第3期1538-1544,共7页
以新疆燃煤电站典型粉煤灰为研究对象,应用不同烧结剂与粉煤灰分别混合高温煅烧,通过盐酸和硫酸浸出锂,研究了烧结剂种类、煅烧温度、烧结剂添加量、浸出剂种类对锂浸出的影响。另外本文将微波技术应用于锂的浸出,对比研究了微波加热及... 以新疆燃煤电站典型粉煤灰为研究对象,应用不同烧结剂与粉煤灰分别混合高温煅烧,通过盐酸和硫酸浸出锂,研究了烧结剂种类、煅烧温度、烧结剂添加量、浸出剂种类对锂浸出的影响。另外本文将微波技术应用于锂的浸出,对比研究了微波加热及传统水浴加热对锂浸出的效果。结果表明:碳酸钾、碳酸钠、乙酸钠、氯化钠作为烧结剂活化粉煤灰使锂的浸出效果较好;对于碳酸钠和碳酸氢钠等浸出效果较好的烧结剂,800℃较适宜作为其煅烧温度;盐酸比硫酸溶液更适合作为浸出剂浸出粉煤灰中的锂;微波加热对锂浸出有非常大的优势,微波4min比水浴4h锂浸出量增加了55%;碳酸钠与碳酸钾混合烧结剂比单一烧结剂表现出更好的活化性能,应用30%碳酸钠和70%碳酸钾混合烧结剂煅烧活化粉煤灰后使灰中锂的浸出率达93%。 展开更多
关键词 粉煤灰 烧结剂 微波 固废回收
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Numerical simulation and analysis of lithium plasma during low-pressure DC arc discharge
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作者 邬润辉 柴忪 +2 位作者 刘佳琪 从拾源 孟刚 《等离子体科学与技术:英文版》 SCIE EI CAS CSCD 2019年第4期16-21,共6页
Alkali metal DC arc discharge has the characteristics of easy ionization,low power consumption,high plasma temperature and ionization degree,etc,which can be applied in aerospace vehicles in various ways.In this paper... Alkali metal DC arc discharge has the characteristics of easy ionization,low power consumption,high plasma temperature and ionization degree,etc,which can be applied in aerospace vehicles in various ways.In this paper,we calculate the physical property parameters of lithium vapor,one of the major alkali metals,and analyze the discharge characteristics of lithium plasma with the magnetohydrodynamic(MHD)model.The discharge effects between constant current and voltage sources are also compared.It is shown that the lithium plasma of DC arc discharge has relatively high temperature and current density.The peak temperature can reach tens of thousands of K,and the current density reaches 6 x 107 A m 2.Under the same rated power,the plasma parameters of the constant voltage source discharge are much higher than those of the constant current source discharge,which can be used as the preferred discharge mode for aerospace applications. 展开更多
关键词 DC DISCHARGE LITHIUM PLASMA NUMERICAL simulation LOW-PRESSURE ARC
三元体系Li +,Cs +∥SO 4 2--H 2O298 K稳定相平衡研究 预览
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作者 孙玖 王如燕 +4 位作者 侯向阳 吴林鑫 陈佩君 曾英 于旭东 《矿产保护与利用》 2019年第2期59-63,共5页
采用等温溶解平衡法研究了三元体系Li +,Cs +∥SO 4 2--H 2O 298 K稳定相平衡关系。测定了平衡液相各组分溶解度、密度和折光率数据并绘制了相应的等温平衡相图、密度-组成图和折光率-组成图。结果表明:该体系属于复杂体系,有复盐3Li 2S... 采用等温溶解平衡法研究了三元体系Li +,Cs +∥SO 4 2--H 2O 298 K稳定相平衡关系。测定了平衡液相各组分溶解度、密度和折光率数据并绘制了相应的等温平衡相图、密度-组成图和折光率-组成图。结果表明:该体系属于复杂体系,有复盐3Li 2SO 4·Cs 2SO 4·2H 2O和Li 2SO 4·Cs 2SO 4形成;其稳定相图由4个固相结晶区、4条单变量曲线和3个相称共饱点组成,4个固相结晶区分别对应Li 2SO 4·H 2O、3Li 2SO 4·Cs 2SO 4·2H 2O、Li 2SO 4·Cs 2SO 4和Cs 2SO 4。 展开更多
关键词 稳定相平衡 溶解度 复盐
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Facile construction of two-dimensional coordination polymers with a well-designed redox-active organic linker for improved lithium ion battery performance
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作者 Jingwei Liu Lin Zhang +4 位作者 Huanhuan Li Peng Zhao Peng Ren Wei Shi Peng Cheng 《中国科学:化学英文版》 SCIE EI CAS CSCD 2019年第5期602-608,共7页
A well-designed redox-active organic linker,pyrazine-2,3,5,6-tetracarboxylate(H4pztc)with brimming active sites for lithium ions storage was utilized to construct coordination polymers(CPs)via a facile hydrothermal re... A well-designed redox-active organic linker,pyrazine-2,3,5,6-tetracarboxylate(H4pztc)with brimming active sites for lithium ions storage was utilized to construct coordination polymers(CPs)via a facile hydrothermal reaction.Those two isostructural two-dimensional(2D)CPs,namely[M2(pztc)(H2O)6]n(M=Co for 1 and Ni for 2),delivered excellent reversible capacities and stable cycling performance as anodes in lithium ion batteries.As demonstrated in electrochemical studies,1 and 2 can achieve highly reversible capacities of 815 and 536 mA h g-1at 200 mA g-1for 150 cycles,respectively,best performed for the reported2D-CP-based anode materials.The electrochemical mechanism studies showed that the remarkable performances can be ascribed to the synergistic Li-storage redox reactions of metal centers and organic moieties.Our work highlights the opportunities of using a well-designed organic ligand to construct low-dimensional CPs as new type of electrode materials for advanced lithium ion batteries. 展开更多
关键词 two-dimensional COORDINATION POLYMERS ANODE materials LITHIUM ion battery
含锂矿物机械化学强化提锂工艺
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作者 何明明 尤海侠 +3 位作者 赵春龙 郑晓洪 曹宏斌 孙峙 《过程工程学报》 CAS CSCD 北大核心 2019年第1期126-135,共10页
采用机械化学活化方法,在机械活化过程中用K2SO4为活化添加剂,强化锂云母中惰性Li-O配位结构活化转型,通过温和稀酸浸出高效分离锂,考察了活化过程添加剂用量、球磨时间和球料比及浸出条件如酸浓度、液固比、搅拌速度、温度和时间等对... 采用机械化学活化方法,在机械活化过程中用K2SO4为活化添加剂,强化锂云母中惰性Li-O配位结构活化转型,通过温和稀酸浸出高效分离锂,考察了活化过程添加剂用量、球磨时间和球料比及浸出条件如酸浓度、液固比、搅拌速度、温度和时间等对锂回收率的影响,确定了最佳工艺条件,讨论了反应过程机理。结果表明,机械化学活化强化破坏云母片层结构中的Si-O-K结构,降低了Si-O配位结构对Li-O配位结构的牵制力,导致Li-O键强减弱,反应活性增加。在最优条件下(精矿与K2SO4质量比5:1、球磨机转速500 r/min、球料质量比20:1、球磨时间3 h、硫酸浓度15vol%、液固比4 L/g、反应温度80℃、浸出搅拌速率200 r/min),锂浸出率可达99.1%。 展开更多
关键词 浸出 锂云母 机械化学活化
锂、钠、钾、镁、钙、氯复合电解质冰冻人血清国家标准品的研制和性能评价 预览
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作者 于婷 沈敏 +1 位作者 曲守方 黄杰 《检验医学》 CAS 2019年第5期457-462,共6页
目的研制锂、钠、钾、镁、钙、氯复合电解质冰冻人血清国家标准品,并评价其性能,促进锂、钠、钾、镁、钙、氯电解质测定的标准化。方法收集含不同浓度锂、钠、钾、镁、钙、氯离子的无溶血、脂血和黄疸血清,经多重过滤、除菌后分装,制备... 目的研制锂、钠、钾、镁、钙、氯复合电解质冰冻人血清国家标准品,并评价其性能,促进锂、钠、钾、镁、钙、氯电解质测定的标准化。方法收集含不同浓度锂、钠、钾、镁、钙、氯离子的无溶血、脂血和黄疸血清,经多重过滤、除菌后分装,制备成3个水平的候选品,-70℃保存。以钾离子作为均匀性评价的特性量,采用单因素方差分析评价候选品的均匀性。以钾、钠、氯离子作为稳定性评价的特性量,采用线性回归分析评价候选品的稳定性。采用参考方法或经验证的方法定值,并计算不确定度。评估候选品、新鲜血清样本在参考方法或经验证的方法与4个常规检测系统间的互通性。结果3个水平侯选品中,钾离子的均匀性检验F值分别为1.6301、1.4986和1.0208,均<F0.05;钾、钠、氯离子在2~8℃、20~25℃和-20℃条件下,均至少可稳定30d。3个水平侯选品中,锂离子定值结果分别为(0.649±0.022)、(1.195±0.032)、(1.334±0.008)mmol/L(k=2),钠离子定值结果分别为(120.057±2.206)、(142.030±1.521)、(158.228±1.293)mmol/L(k=2),钾离子定值结果分别为(5.042±0.143)、(5.739±0.106)、(6.158±0.094)mmol/L(k=2),镁离子定值结果分别为(0.732±0.021)、(0.857±0.026)、(1.144±0.026)mmol/L(k=2),钙离子定值结果分别为(2.014±0.078)、(2.348±0.056)、(3.070±0.024)mmol/L(k=2),氯离子定值结果分别为(90.814±2.005)、(108.875±0.908)、(128.156±1.453)mmol/L(k=2)。钠、钾、镁、钙和氯离子3个水平侯选品浓度均在新鲜血清样本的95%可信区间内,互通性良好。结论制备的锂、钠、钾、镁、钙、氯复合电解质冰冻人血清国家标准品候选品均匀性、稳定性好,钠、钾、镁、钙和氯离子侯选品互通性良好,定值准确可靠,可作为国家标准品使用。 展开更多
关键词 冰冻人血清 国家标准品
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Metal–Oleate Complex?Derived Bimetallic Oxides Nanoparticles Encapsulated in 3D Graphene Networks as Anodes for Efficient Lithium Storage with Pseudocapacitance
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作者 Yingying Cao Kaiming Geng +6 位作者 Hongbo Geng Huixiang Ang Jie Pei Yayuan Liu Xueqin Cao Junwei Zheng Hongwei Gu 《纳微快报:英文版》 CAS CSCD 2019年第1期250-263,共14页
In this manuscript,we have demonstrated the delicate design and synthesis of bimetallic oxides nanoparticles derived from metal–oleate complex embedded in 3D graphene networks(MnO/CoMn2O4?GN),as an anode material for... In this manuscript,we have demonstrated the delicate design and synthesis of bimetallic oxides nanoparticles derived from metal–oleate complex embedded in 3D graphene networks(MnO/CoMn2O4?GN),as an anode material for lithium ion batteries.The novel synthesis of the MnO/CoMn2O4?GN consists of thermal decomposition of metal–oleate complex containing cobalt and manganese metals and oleate ligand,forming bimetallic oxides nanoparticles,followed by a selfassembly route with reduced graphene oxides.The MnO/CoMn2O4?GN composite,with a unique architecture of bimetallic oxides nanoparticles encapsulated in 3D graphene networks,rationally integrates several benefits including shortening the diffusion path of Li+ions,improving electrical conductivity and mitigating volume variation during cycling.Studies show that the electrochemical reaction processes of MnO/CoMn2O4?GN electrodes are dominated by the pseudocapacitive behavior,leading to fast Li+charge/discharge reactions.As a result,the MnO/CoMn2O4?GN manifests high initial specific capacity,stable cycling performance,and excellent rate capability. 展开更多
关键词 Metal–oleate complex Bimetallic oxides NANOPARTICLES Porous architecture 3D GRAPHENE NETWORKS Lithium ion batteries
One-step synthesis of robust carbon nanotube foams with ultrahigh surface area for high-performance lithium ion battery
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作者 YU PengCheng YUAN YanChao 《中国科学:技术科学英文版》 SCIE EI CAS CSCD 2019年第3期464-471,共8页
A novel three-dimensional(3D) carbon nanotube foams(CNTF) with ultrahigh specific surface area have been fabricated through a unique but facile one-step synthesis by using CO2 as both carbon source and activating agen... A novel three-dimensional(3D) carbon nanotube foams(CNTF) with ultrahigh specific surface area have been fabricated through a unique but facile one-step synthesis by using CO2 as both carbon source and activating agent. The activation temperature and time have been adjusted, and the best sample demonstrates a specific surface area of 1959.8 m2 g–1 and a total pore volume of 3.23 cm3 g–1. A reversible capacity of about 870 mAhg–1 is maintained at 50 mAg–1 when the CNTF used as cathode materials. Meanwhile, the capacity is as large as 320 mAhg–1 at the current density of 2 A g–1 and the capacity retention is nearly 100% after 500 cycles. These excellent and highly stable battery performances should be attributed to the structural advantages of as-synthesized CNTFs generated by using a facile CO2-assisted strategy, which may potentially be applied in large scale production of porous 3D carbon materials in the fields of energy storage and conversion. 展开更多
关键词 carbon NANOTUBE foam CO2-assisted activation ultrahigh surface area lithium ion battery
碳酸锂对双相障碍患者氧化应激水平的影响 预览
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作者 王颖怡 陆燕华 +5 位作者 耿瑞杰 程小燕 黄欣欣 吕钦谕 应启昂 易正辉 《上海交通大学学报:医学版》 CAS CSCD 北大核心 2019年第5期494-499,共6页
目的·探讨双相障碍患者及其不同疾病状态下的氧化应激水平,了解碳酸锂治疗对双相障碍患者氧化应激水平的影响。方法·选取上海交通大学医学院附属精神卫生中心门诊/住院的双相障碍患者61 例(轻躁狂/躁狂发作8 例,抑郁发作53 ... 目的·探讨双相障碍患者及其不同疾病状态下的氧化应激水平,了解碳酸锂治疗对双相障碍患者氧化应激水平的影响。方法·选取上海交通大学医学院附属精神卫生中心门诊/住院的双相障碍患者61 例(轻躁狂/躁狂发作8 例,抑郁发作53 例),同时选取49 例健康人作为正常对照。双相障碍患者单用碳酸锂治疗,观察6 周,在治疗前和6 周末采用汉密尔顿抑郁量表17 项(Hamilton Depression Scale-17,HAMD17)、Young 躁狂评定量表(Young Mania Rating Scale,YMRS)及临床疗效总评量表严重度分量表(Clinical Global Impression-Severity of Illness,CGI-SI)评估患者的临床疗效,同时抽取外周静脉血,检测血浆过氧化氢酶(catalase,CAT)、超氧化物歧化酶(superoxide dismutase,SOD)、谷胱甘肽过氧化物酶(glutathione peroxidase,GSH-Px)及丙二醛(malondialdehyde,MDA)含量。比较双相障碍患者和正常对照组间氧化应激水平的差异,碳酸锂治疗前后氧化应激水平的变化。结果·双相障碍患者SOD 水平均低于正常人群(t=5.403,P=0.000),GSH-Px 和MDA 水平均高于正常人群(t=8.371,P=0.000;t=6.063,P=0.000),CAT 水平在这2 组中差异无统计学意义,且4 项氧化应激指标在躁狂状态或抑郁状态患者之间无明显差异。GSH-Px、MDA 含量在碳酸锂治疗后较治疗前下降,差异有统计学意义(t=4.352,P=0.000;t=2.720,P=0.009),其他氧化应激指标SOD、CAT 水平治疗前后无明显变化。碳酸锂治疗后,双相躁狂状态和抑郁状态MDA 含量均有明显下降(t=3.072,P=0.018;t=3.532,P=0.001),且躁狂状态下降更明显,而双相抑郁状态的GSH-Px 水平有明显下降(t=2.880,P=0.006)。结论·双相障碍患者存在氧化应激损伤;碳酸锂可以调整双相障碍患者氧化应激系统的不平衡,其作用在不同疾病状态下略有差别。 展开更多
关键词 双相障碍 氧化应激 心境稳定剂 锂盐 作用机制
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双相障碍分类、分型与药物治疗的研究进展
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作者 刘燕 高哲石 《世界临床药物》 CAS 2019年第4期228-234,260共8页
双相障碍又称为躁狂抑郁症,临床表现为躁狂发作或抑郁发作,是心境障碍的临床亚型,因其多以抑郁发作起病,故常被误诊或漏诊,从而影响患者的预后。双相障碍应用药物治疗时,要同时关注药物的疗效和安全性,此外还要预防治疗药物可能诱发的... 双相障碍又称为躁狂抑郁症,临床表现为躁狂发作或抑郁发作,是心境障碍的临床亚型,因其多以抑郁发作起病,故常被误诊或漏诊,从而影响患者的预后。双相障碍应用药物治疗时,要同时关注药物的疗效和安全性,此外还要预防治疗药物可能诱发的情感转相。临床上对该病准确分型和规范药物治疗具有重要意义。该文针对双相障碍的分类、分型及药物治疗领域的相关研究进展进行综述,期望能为临床工作者提供参考依据。 展开更多
关键词 双相障碍 躁狂发作 抑郁发作 心境障碍 药物治疗 情感稳定剂 锂盐 抗精神病药物
Reconfigurable directional coupler in lithium niobate crystal fabricated by three-dimensional femtosecond laser focal field engineering
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作者 Qian Zhang Meng Li +7 位作者 Jian Xu Zijie Lin Haofeng Yu Min Wang Zhiwei Fang Ya Cheng Qihuang Gong Yan Li 《光子学研究:英文版》 CSCD 2019年第5期503-507,共5页
For crystals, depressed cladding waveguides have advantages such as preservation of the spectroscopic as well as non-linear properties and the capability to guide both horizontal and vertical polarization modes, but f... For crystals, depressed cladding waveguides have advantages such as preservation of the spectroscopic as well as non-linear properties and the capability to guide both horizontal and vertical polarization modes, but fabrication is always quite time consuming. In addition, it is usually difficult to couple modes propagating in different depressed cladding waveguides through evanescent field overlap, so it is often required to dynamically reconfigure photonic waveguide devices using external fields for classical or quantum applications. Here, we experimentally demonstrate the single-scan femtosecond laser transverse writing of depressed cladding waveguides to form a 2 × 2 directional coupler inside lithium niobate crystal, which is integrated with two deeply embedded microelectrodes on both sides of the interaction region to reconfigure the coupling. By focal field engineering of the femtosecond laser, we specially generate a three-dimensional longitudinally oriented ring-shaped focal intensity profile composed of 16 discrete spots to simultaneously write the entire cladding region. The fabricated waveguides exhibit good single guided modes in two orthogonal polarizations at 1550 nm. By applying voltage to the deeply embedded microelectrodes fabricated with the femtosecond laser ablation followed by selective electroless plating, we successfully facilitate the light coupling from the input arm to the cross arm and thus actively tune the splitting ratio. These results open new important perspectives in the efficient fabrication of reconfigurable complex three-dimensional devices in crystals based on depressed cladding waveguides. 展开更多
关键词 lithium NIOBATE CRYSTAL fabricated THREE-DIMENSIONAL femtosecond laser FOCAL field engineering vertical polarization modes
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