Thermal-healing of lattice defects for high-energy single-crystalline battery cathodes

Nature Communications

Dechao Meng¹  Wei-Na Wang¹  Zi-Feng Ma¹  Linsen Li²  Yong S. Chu³  Xiaojing Huang³  Yang Yang³  Kejie Zhao⁴  Xiaomei He⁴  Piero Pianetta⁵  Yijin Liu⁵  Jun-Sik Lee⁵  Zhisen Jiang⁵  Sang-Jun Lee⁵  Guannan Qian⁶  Shaofeng Li⁷  Chang Yu⁸  Jieshan Qiu⁸ 

[1] Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 200240, Shanghai, China;Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 200240, Shanghai, China;Shanghai Jiao Tong University Sichuan Research Institute, 610213, Chengdu, China;National Synchrotron Light Source II, Brookhaven National Laboratory, 11973, Upton, NY, USA;School of Mechanical Engineering, Purdue University, 47906, West Lafayette, IN, USA;Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 94025, Menlo Park, CA, USA;Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 94025, Menlo Park, CA, USA;Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 200240, Shanghai, China;Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 94025, Menlo Park, CA, USA;State Key Lab of Fine Chemicals, School of Chemical Engineering, Liaoning Key Lab for Energy Materials and Chemical Engineering, Dalian University of Technology, 116024, Dalian, China;State Key Lab of Fine Chemicals, School of Chemical Engineering, Liaoning Key Lab for Energy Materials and Chemical Engineering, Dalian University of Technology, 116024, Dalian, China;

DOI  :  10.1038/s41467-022-28325-5

来源: Springer

【 摘 要 】

Single-crystalline nickel-rich cathodes are a rising candidate with great potential for high-energy lithium-ion batteries due to their superior structural and chemical robustness in comparison with polycrystalline counterparts. Within the single-crystalline cathode materials, the lattice strain and defects have significant impacts on the intercalation chemistry and, therefore, play a key role in determining the macroscopic electrochemical performance. Guided by our predictive theoretical model, we have systematically evaluated the effectiveness of regaining lost capacity by modulating the lattice deformation via an energy-efficient thermal treatment at different chemical states. We demonstrate that the lattice structure recoverability is highly dependent on both the cathode composition and the state of charge, providing clues to relieving the fatigued cathode crystal for sustainable lithium-ion batteries.

【 授权许可】

CC BY