材料科学
磁滞
电压
阴极
电化学
电极
工作(物理)
衍射
高压
离子
纳米技术
化学物理
凝聚态物理
电气工程
物理化学
热力学
光学
化学
物理
工程类
有机化学
作者
Marcela Calpa,Kei Kubota,Emiko Mizuki,Manai Ono,Shôichi Matsuda,Kazunori Takada
标识
DOI:10.1016/j.ensm.2023.103051
摘要
Li-rich layered oxides are promising as next-generation cathode materials for Li-ion batteries because of their potential to provide high voltage and large capacities. However, these materials suffer from significant voltage hysteresis between charge and discharge, and the causes are not yet well understood. In this work, a comprehensive in-situ X-ray diffraction analysis, conducted in Li2RuO3 as a model of Li-rich cathode materials, reveals that a discrepancy in the intermediate crystal phases formed during Li extraction and re-insertion gives rise to different electrochemical potentials between charge and discharge, which causes the undesired voltage hysteresis. These findings enrich the understanding of voltage hysteresis in Li-rich materials.
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