Shengnan He, Rui Zhang, Yufa Zhou, Chenchen Li, Xu Fei Xue, Chao Zheng, Zhijun Wu, Jiantuo Gan, Liaona She, Fulai Qi, Yanxia Liu, Yaxiong Yang, Wubin Du, Yinzhu Jiang, Mingxia Gao, Hongge Pan
Lithium-rich oxides (LROs) offer theoretical energy densities exceeding 1000 Wh kg –1 . Nonetheless, their poor electron/ion conduction properties, as well as severe structural instability during high-voltage cycling, result in limited capacity and rapid performance degradation. Herein, coherent spinel structure bands are in situ constructed in the LRO matrix by lattice distortion relaxation after initial activation. These bands significantly enhance Li + and electron transport while mitigating cyclic stress through coherent effects. As a result, the modified LRO delivers a specific capacity of 294 mAh g –1 at 0.1C, with an initial energy density reaching 1049.6 Wh kg –1 . Furthermore, it shows a capacity retention of 90.5% after 500 cycles at 1 C. This study demonstrates lattice coherent engineering driven by distortion relaxation as an effective strategy for developing lithium-ion battery cathodes.