The cyclic plummet caused by mechanical-damage-induced particle cracking is one of the key challenges to hinder the practical application of nickel-rich cathodes. Mechanical stress, roughly estimated by Δc resulted from variation of O-(Li)-O propelling forces, could be tuned up by partially deflecting oxygen charges. Herein, we propose a strategy to abate the mechanical stress of LiNi_0.9Co_0.08Mn_0.02O₂ via adjusting electrons’ distribution with appropriate cations substitution. Among the investigated species, Ti- and Al-modifications alleviate the change of lattice c by drawing the neighbor-oxygen charges to transition metal (TM) layers, and Zn-substitution aggrandizes Δc indicating that pushing effect plays the dominant role. Since it renders the largest reduction of lattice c variation, ∼40% less in both regions, Ti-substituted sample retains 93.4% of the initial capacity after 200 cycles, even without particle cracking, although the other samples also deliver ∼220 mAhg^-1 under 0.1 C. Our approaches demonstrate the dependence of mechanical stress on electronic micro-structure, which is viable to develop long-life cathodes for power lithium ion batteries.

机械损伤引起的颗粒开裂引起的循环下降是阻碍富镍阴极实际应用的关键挑战之一。由O-（Li）-O推进力的变化所引起的机械应力（由Δc粗略估算）可以通过部分偏转氧气电荷来调整。在这里，我们提出一种减轻LiNi _0.9 Co _0.08 Mn _0.02 O ₂的机械应力的策略。通过用适当的阳离子取代来调节电子的分布 在所研究的物种中，Ti和Al修饰通过将邻近的氧电荷吸引到过渡金属（TM）层来缓解晶格c的变化，而Zn取代增强了Δc，表明推动作用起主要作用。由于Ti取代的样品最大程度地减少了晶格c的变化，在两个区域中均减少了约40％，即使在没有颗粒破裂的情况下，Ti取代的样品在200个循环后仍保持了93.4％的初始容量，尽管其他样品也提供了约220 mAhg ^-1温度低于0.1C。我们的方法证明了机械应力对电子微结构的依赖性，这对于开发用于动力锂离子电池的长寿命阴极是可行的。