材料科学
阳极
电导率
离子
离子电导率
硅
锂(药物)
导电聚合物
高分子化学
化学工程
聚合物
电极
复合材料
电解质
有机化学
内分泌学
工程类
医学
物理化学
化学
冶金
作者
Wenwu Zeng,Lei Wang,Xiang Peng,Tiefeng Liu,Youyu Jiang,Fei Qin,Lin Hu,Paul K. Chu,Kaifu Huo,Yinhua Zhou
标识
DOI:10.1002/aenm.201702314
摘要
Abstract Polymer binders with high ion and electron conductivities are prepared by assembling ionic polymers (polyethylene oxide and polyethylenimine) onto the electrically conducting polymer poly(3,4‐ethylenedioxythiophene): poly(styrenesulfonate) chains. Crosslinking, chemical reductions, and electrostatics increase the modulus of the binders and maintain the integrity of the anode. The polymer binder shows lithium‐ion diffusivity and electron conductivity that are 14 and 90 times higher than those of the widely used carboxymethyl cellulose (with acetylene black) binder, respectively. The silicon anode with the polymer binder has a high reversible capacity of over 2000 mA h g −1 after 500 cycles at a current density of 1.0 A g −1 and maintains a superior capacity of 1500 mA h g −1 at a high current density of 8.0 A g −1 .
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