法拉第效率
阳极
材料科学
重量分析
导电体
硅
一氧化硅
集电器
聚合物
化学工程
锂(药物)
电池(电)
锂离子电池
电解质
纳米技术
储能
电极
复合材料
化学
冶金
有机化学
物理
量子力学
医学
工程类
功率(物理)
物理化学
内分泌学
作者
Hui Zhao,Zhihui Wang,Peng Lü,Meng Jiang,Feifei Shi,Xiangyun Song,Ziyan Zheng,Xin Zhou,Yanbao Fu,Abdelbast Guerfi,Xingcheng Xiao,Zhi Liu,Vincent Battaglia,Karim Zaghib,Gao Liu
出处
期刊:Nano Letters
[American Chemical Society]
日期:2014-10-15
卷期号:14 (11): 6704-6710
被引量:171
摘要
Silicon alloys have the highest specific capacity when used as anode material for lithium-ion batteries; however, the drastic volume change inherent in their use causes formidable challenges toward achieving stable cycling performance. Large quantities of binders and conductive additives are typically necessary to maintain good cell performance. In this report, only 2% (by weight) functional conductive polymer binder without any conductive additives was successfully used with a micron-size silicon monoxide (SiO) anode material, demonstrating stable and high gravimetric capacity (>1000 mAh/g) for ∼500 cycles and more than 90% capacity retention. Prelithiation of this anode using stabilized lithium metal powder (SLMP) improves the first cycle Coulombic efficiency of a SiO/NMC full cell from ∼48% to ∼90%. The combination enables good capacity retention of more than 80% after 100 cycles at C/3 in a lithium-ion full cell.
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