电解质
锂钴氧化物
锂(药物)
阴极
图层(电子)
材料科学
电池(电)
氧化物
化学工程
化学
锂离子电池
复合材料
电极
冶金
物理化学
工程类
物理
功率(物理)
内分泌学
医学
量子力学
作者
Ziying Wang,Jungwoo Z. Lee,Huolin L. Xin,Lili Han,Nathanaël Grillon,Delphine Guy-Bouyssou,E. Bouyssou,M. Proust,Ying Shirley Meng
标识
DOI:10.1016/j.jpowsour.2016.05.098
摘要
All-solid-state lithium-ion batteries have the potential to not only push the current limits of energy density by utilizing Li metal, but also improve safety by avoiding flammable organic electrolyte. However, understanding the role of solid electrolyte – electrode interfaces will be critical to improve performance. In this study, we conducted long term cycling on commercially available lithium cobalt oxide (LCO)/lithium phosphorus oxynitride (LiPON)/lithium (Li) cells at elevated temperature to investigate the interfacial phenomena that lead to capacity decay. STEM-EELS analysis of samples revealed a previously unreported disordered layer between the LCO cathode and LiPON electrolyte. This electrochemically inactive layer grew in thickness leading to loss of capacity and increase of interfacial resistance when cycled at 80 °C. The stabilization of this layer through interfacial engineering is crucial to improve the long term performance of thin-film batteries especially under thermal stress.
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