Abstract Controlling hierarchical structure assembled by nanoplates with exposed {010} active planes is essential to optimize the electrochemical performance of nickel-rich layered oxide cathode materials. In this work, nickel-rich layered oxide cathodes with various degrees of packing and surface area of exposed {010} facets were synthesized via a simple continuous co-precipitation method and a stepwise calcination process. The effects of structure and morphology on the Li+ transport kinetics of LiNi0.58Co0.25Mn0.17O2 were systematically evaluated by physical and electrochemical characterizations. The results show that the enhanced growth of {010} active facets, namely, the lateral plane of the primary nanoplates can facilitate the Li+ intercalation/deintercalation and thus improve the rate capability. Meanwhile, the compact micro-sized secondary particle guarantees the structural stability of the Ni-rich cathodes. The LiNi0.58Co0.25Mn0.17O2 material with optimized structure manifests high discharge capacities (185 mAh g−1 at 0.1 C), outstanding high-rate capability (106 mAh g−1 at 50 C) and excellent long cycle life (capacity retention of 78% after 500 cycles at 5 C).

中文翻译：

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具有优先暴露{010}活性面的富镍层状氧化物阴极的可控合成，用于高倍率和长循环稳定锂离子电池

摘要 控制由具有暴露的 {010} 活性平面的纳米板组装的分级结构对于优化富镍层状氧化物正极材料的电化学性能至关重要。在这项工作中，通过简单的连续共沉淀法和逐步煅烧工艺合成了具有不同堆积程度和暴露 {010} 面表面积的富镍层状氧化物阴极。通过物理和电化学表征系统地评估了结构和形态对 LiNi0.58Co0.25Mn0.17O2 的 Li+ 传输动力学的影响。结果表明，{010}活性面的增强生长，即初级纳米片的横向平面可以促进Li+的嵌入/脱嵌，从而提高倍率性能。同时，紧凑的微米级二次粒子保证了富镍正极的结构稳定性。具有优化结构的 LiNi0.58Co0.25Mn0.17O2 材料具有高放电容量（0.1 C 时为 185 mAh g-1）、出色的高倍率容量（50 C 时为 106 mAh g-1）和优异的长循环寿命（容量保持率）在 5°C 下 500 次循环后为 78%）。