The wide applications of Ni‐rich LiNi_1‐x‐yCo_xMn_yO₂ cathodes are severely limited by capacity fading and voltage fading during the cycling process resulting from the pulverization of particles, interfacial side reactions, and phase transformation. The canonical surface modification approach can improve the stability to a certain extent; however, it fails to resolve the key bottlenecks. The preparation of Li(Ni_0.4Co_0.2Mn_0.4)_1‐xTi_xO₂ on the surface of LiNi_0.8Co_0.1Mn_0.1O₂ particles with a coprecipitation method is reported. After sintering, Ti diffuses into the interior and mainly distributes along surface and grain boundaries. A strong surface and grain boundary strengthening are simultaneously achieved. The pristine particles are fully pulverized into first particles due to mechanical instability and high strains, which results in serious capacity fading. In contrast, the strong surface and the grain boundary strengthening can maintain the structural integrity, and therefore significantly improve the cycle stability. A general and simple strategy for the design of high‐performance Ni‐rich LiNi_1‐x‐yCo_xMn_yO₂ cathode is provided and is applicable to surface modification and grain‐boundary regulation of other advanced cathodes for batteries.

中文翻译：

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调节富镍层状阴极的表面和晶界结构以实现超高循环稳定性

富镍LiNi _{1 -x-y} Co _x Mn _y O ₂阴极的广泛应用受到循环的影响，这是由于微粒的粉碎，界面副反应和相变而导致的容量衰减和电压衰减。规范的表面改性方法可以在一定程度上提高稳定性。但是，它无法解决关键瓶颈。在LiNi _0.8 Co _0.1 Mn _0.1 O表面上制备Li（Ni _0.4 Co _0.2 Mn _0.4）_{1- x} Ti _x O ₂据报道有_2种颗粒具有共沉淀法。烧结后，Ti扩散到内部，主要沿表面和晶界分布。同时实现了强大的表面和晶界强化。由于机械不稳定性和高应变，原始颗粒被完全粉碎成第一颗粒，这导致严重的容量衰减。相反，强表面和晶界强化可以保持结构完整性，从而显着提高循环稳定性。对于高性能镍富利尼设计的一般和简单的策略_{1 X - Ÿ}有限公司_X锰_ÿ Ø ₂ 提供了正极，适用于电池的其他高级正极的表面改性和晶界调节。