The exponential growth of “3C” (computer, communication, and consumer electronics) market generates an ever-increasing demand on recycling materials from the end-of-life LiCoO₂ (LCO) batteries with ecological and efficient methods. Herein, we present a direct and scalable approach to recycle the degraded LCO by healing and stabilizing their damaged structure via solid reactions. The as-proposed approach constructs a protective layer onto the regenerated LCO particles to suppress the O3 to H1–3 phase transition at 4.55 V. Benefiting from the unique design, superb electrochemical performance was achieved for the regenerated LCO, exhibiting a high specific capacity retention of 85.9% after 100 cycles with a charging cut-off voltage of 4.6 V and a superb rate capability, which are even superior to those of the pristine commercial LCO. In addition, compared with the LCO production with raw chemicals, the as-proposed healing-stabilizing strategy reduces the total energy consumption by 68.5%, bringing noteworthy economic and environmental benefits. This work provides not only new understandings to stabilize LCO at high voltage, but also a practical solution to the closed-loop development of LCO batteries.

“3C”（计算机、通信和消费电子产品）市场的指数级增长导致对报废 LiCoO _{2回收材料的需求不断增长}(LCO) 电池采用生态高效的方法。在此，我们提出了一种直接且可扩展的方法，通过固体反应修复和稳定受损结构来回收降解的 LCO。所提出的方法在再生的 LCO 颗粒上构建了一个保护层，以抑制 4.55 V 时 O3 到 H1-3 的相变。得益于独特的设计，再生 LCO 实现了卓越的电化学性能，表现出高比容量保持率100次循环后的充电率为85.9%，充电截止电压为4.6 V，倍率性能优异，甚至优于原始商用LCO。此外，与使用原料化学品生产LCO相比，所提出的愈合稳定策略将总能耗降低了68.5%，带来显着的经济效益和环境效益。这项工作不仅为在高压下稳定 LCO 提供了新的认识，而且为 LCO 电池的闭环开发提供了实用的解决方案。