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Enhanced mechanical strength of a highly de-lithiated single-crystal Ni-rich cathode to suppress irreversible planar
Jiachao Yang1,2, Shenyang Xu3, Jian Yu4
1School of Metallurgy and Environment, Central South University, Changsha, 410083, P. R. China. yunjiao_li@csu.edu.cn.
Chemical Communications (Cambridge, England)
|July 28, 2023
Abstract:
The mechanical properties of de-lithiated single-crystal Ni-rich cathodes are causing extensive concern. Here, we first show that the compression hardness of single crystal Ni-rich cathode particles decreases significantly at highly de-lithiated states by micro-compression testing. Thus, phase-boundary hardening was introduced to inhibit the planar gliding, resulting in excellent electrochemical performance.
