Toward Practical Application of Functional Conductive Polymer Binder for a High-Energy Lithium-Ion Battery Design

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• 作者：Hui Zhao ; Zhihui Wang ; Peng Lu ; Meng Jiang ; Feifei Shi ; Xiangyun Song ; Ziyan Zheng ; Xin Zhou ; Yanbao Fu ; Guerfi Abdelbast ; Xingcheng Xiao ; Zhi Liu ; Vincent S. Battaglia ; Karim Zaghib ; Gao Liu
• 刊名：Nano Letters
• 出版年：2014
• 出版时间：November 12, 2014
• 年：2014
• 卷：14
• 期：11
• 页码：6704-6710
• 全文大小：393K
• ISSN：1530-6992

文摘

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 鈭?00 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 鈭?8% to 鈭?0%. The combination enables good capacity retention of more than 80% after 100 cycles at C/3 in a lithium-ion full cell.

Keywords:

silicon monoxide; conductive polymer binder; stabilized lithium metal powder (SLMP); lithium ion battery