Nanoscale Electrical Degradation of Silicon–Carbon Composite Anode Materials for Lithium-Ion Batteries,ACS Applied Materials & Interfaces

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Nanoscale Electrical Degradation of Silicon–Carbon Composite Anode Materials for Lithium-Ion Batteries
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-06-26 00:00:00 , DOI: 10.1021/acsami.8b07012
Seong Heon Kim ₁ , Yong Su Kim ₁ , Woon Joong Baek ₁ , Sung Heo ₁ , Dong-Jin Yun ₁ , Sungsoo Han ₁ , Heechul Jung ₁

Affiliation

High-performance lithium-ion batteries (LIBs) are in increasing demand for a variety of applications in rapidly growing energy-related fields including electric vehicles. To develop high-performance LIBs, it is necessary to comprehensively understand the degradation mechanism of the LIB electrodes. From this viewpoint, it is crucial to investigate how the electrical properties of LIB electrodes change under charging and discharging. Here, we probe the local electrical properties of LIB electrodes with nanoscale resolution by scanning spreading resistance microscopy (SSRM). Via quantitative and comparative SSRM measurements on pristine and degraded LIB anodes of Si–C composites blended with graphite (Gr) particles, the electrical degradation of the LIB anodes is visualized. The electrical conductivity of the Si–C composite particles considerably degraded over 300 cycles of charging and discharging, whereas the Gr particles maintained their conductivity.

中文翻译：

锂离子电池硅碳复合负极材料的纳米级电降解

高性能锂离子电池（LIB）在快速增长的能源相关领域（包括电动汽车）中对各种应用的需求不断增长。为了开发高性能的LIB，有必要全面了解LIB电极的降解机理。从这一观点出发，研究LIB电极在充电和放电过程中如何改变其电性能至关重要。在这里，我们通过扫描扩散电阻显微镜（SSRM）以纳米级分辨率探测LIB电极的局部电学性质。通过对与石墨（Gr）颗粒共混的Si-C复合材料的原始和降解的LIB阳极进行定量和比较的SSRM测量，可以看到LIB阳极的电降解情况。

更新日期：2018-06-26

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