Structural Degradation of Cu Current Collector During Electrochemical Cycling of Sn-Based Lithium-Ion Batteries
Structural Degradation of Cu Current Collector During Electrochemical Cycling of Sn-Based Lithium-Ion Batteries
复制标题
锡基锂离子电池电化学循环过程中铜集流体的结构退化
DOI：
10.1007/s11664-019-07549-0
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发表时间：
2019-09
影响因子：
2.1
通讯作者：
Yang Fuqian
中科院分区：
文献类型：
--
作者：
Guo Meiqing;Meng Weijia;Zhang Xiaogang;Bai Zhongchao;Wang Genwei;Wang Zhihua;Yang Fuqian
集流器是否存在结构退化，这可能导致锂离子电池的容量损失，这是一个悬而未决的问题。在这项工作中，我们研究了循环引起的锡基锂半电池中使用的Cu集流器的结构退化/损伤。电化学循环在第一次循环后仍会形成一层多孔结构，并形成Li2SnCu。随着循环次数的增加，多孔结构的厚度增加，并且在长时间循环后，多孔层与“固体”Cu层发生局部分离。经过1次和5次电化学循环后形成的多孔层的标称接触模量略大于原始Cu集流器。对于经过20次或更多次电化学循环形成的多孔层，法向接触模量通常小于原始Cu。除5次电化学循环后形成的多孔结构外，多孔结构的压痕硬度普遍低于原始Cu。
It is an open question whether there exists structural degradation of current collectors, which likely can lead to the capacity loss of lithium-ion batteries. In this work, we investigate the cycling-induced structural degradation/damage of the Cu current collector used in Sn-based lithium half cells. Electrochemical cycling causes the formation of a layer of porous structure even after the first cycle and the formation of Li2SnCu. The thickness of the porous structure increases with the increase of the cycle number, and local separation between the porous layer and the “solid” Cu layer occurs after prolonged cycling. The nominal contact moduli of the porous layers formed after one and five electrochemical cycles are slightly larger than the pristine Cu current collector. For the porous layers formed after twenty or more electrochemical cycles, the normal contact modulus is generally less than the pristine Cu. The indentation hardnesses of the porous structures are generally less than the pristine Cu except for the porous structure formed after five electrochemical cycles.
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DOI：
10.1115/1.1857920
发表时间：
2005-02-01
影响因子：
1.7
作者：
Shi, X;Polycarpou, AA
通讯作者：
Polycarpou, AA
影响因子：
2.1
作者：
Hyeji Park;Hyelim Choi;Kyungju Nam;Sukyung Lee;J. Um;Kyungbae Kim;Jae‐Hun Kim;W. Yoon;H. Choe
通讯作者：
Hyeji Park;Hyelim Choi;Kyungju Nam;Sukyung Lee;J. Um;Kyungbae Kim;Jae‐Hun Kim;W. Yoon;H. Choe
影响因子：
3.9
作者：
D. Aurbach;Y. Cohen
通讯作者：
D. Aurbach;Y. Cohen
影响因子：
2.1
作者：
Guodong Liang;Xiaogang Sun;Jia‐mei Lai;Chengcheng Wei;Yapan Huang;Hao Hu;Jingyi Zou;Yuhao Xu
通讯作者：
Guodong Liang;Xiaogang Sun;Jia‐mei Lai;Chengcheng Wei;Yapan Huang;Hao Hu;Jingyi Zou;Yuhao Xu
影响因子：
3.9
作者：
J. Um;Hyeji Park;Yong‐Hun Cho;Matthew P. B. Glazer;D. Dunand;H. Choe;Y. Sung
通讯作者：
J. Um;Hyeji Park;Yong‐Hun Cho;Matthew P. B. Glazer;D. Dunand;H. Choe;Y. Sung