Chitosan, a new and environmental benign electrode binder for use with graphite anode in lithium-ion batteries
Chitosan, a new and environmental benign electrode binder for use with graphite anode in lithium-ion batteries
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壳聚糖，一种新型环保良性电极粘合剂，用于锂离子电池石墨负极
DOI：
10.1016/j.electacta.2013.05.009
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发表时间：
2013-08-30
影响因子：
6.6
通讯作者：
Zheng, Honghe
中科院分区：
文献类型：
--
作者：
Chai, Lili;Qu, Qunting;Zheng, Honghe
壳聚糖被用作锂离子电池球形石墨负极的电极粘合剂材料。与使用聚偏二氟乙烯（PVDF）粘合剂相比，使用壳聚糖的石墨负极在首次库伦效率、倍率性能和循环行为方面表现出增强的电化学性能。在比容量相似的情况下，壳聚糖基阳极的首次库伦效率为 95.4%，而 PVDF 基阳极的首次库仑效率为 89.3%。在0.5C下进行200次充放电循环后，壳聚糖基电极的容量保持率明显高于PVDF基电极。通过电化学阻抗谱（EIS）和扫描电子显微镜（SEM）测量来研究石墨电极上形成的固体电解质界面（SEI）的形成和演变。结果表明，与使用传统 PVDF 粘合剂相比，使用壳聚糖粘合剂在石墨电极表面形成了薄而均匀且稳定的 SEI 层 (C) 2013 Elsevier Ltd. 版权所有。
Chitosan was applied as the electrode binder material for a spherical graphite anode in lithium-ion batteries. Compared to using poly (vinylidene fluoride) (PVDF) binder, the graphite anode using chitosan exhibited enhanced electrochemical performances in terms of the first Columbic efficiency, rate capability and cycling behavior. With similar specific capacity, the first Columbic efficiency of the chitosan-based anode is 95.4% compared to 89.3% of the PVDF-based anode. After 200 charge-discharge cycles at 0.5C, the capacity retention of the chitosan-based electrode showed to be significantly higher than that of the PVDF-based electrode. Electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) measurements were carried out to investigate the formation and evolution of the solid electrolyte interphase (SEI) formed on the graphite electrodes. The results show that a thin, homogenous and stable SEI layer is formed on the graphite electrode surface with chitosan binder compared with that using the conventional PVDF binder (C) 2013 Elsevier Ltd. All rights reserved.