Rational and precise control of the structure and dimension of electrode materials is an efficient way to improve their electrochemical performance. In this work, solvothermal or co-precipitation method is used to synthesize lithium-rich layered oxide materials of Li_1.2Mn_0.56Co_0.12Ni_0.12O₂ (LLO) with various morphologies and structures, including microspheres, microrods, nanoplates, and irregular nanoparticles. These materials exhibit strong structure-dependent electrochemical properties. The porous hierarchical structured LLO microrods exhibit the best performance, delivering a discharge capacity of 264.6 mAh g⁻¹ at 0.5C with over 91% retention after 100 cycles. At a high rate of 5C, a high discharge capacity of 173.6 mAh g⁻¹ can be achieved. This work reveals the relationship between the morphologies and electrochemical properties of LLO cathode materials, and provides a feasible approach to fabricating robust and high-performance electrode materials for lithium-ion batteries.

中文翻译：

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锂离子电池中富锂层状氧化物的结构依赖性电化学性能

合理而精确地控制电极材料的结构和尺寸是提高其电化学性能的有效方法。在这项工作中，使用溶剂热或共沉淀法合成具有各种形态和结构的Li _1.2 Mn _0.56 Co _0.12 Ni _0.12 O ₂（LLO）的富锂层状氧化物材料，包括微球，微棒，纳米板和不规则纳米颗粒。这些材料表现出很强的结构依赖性电化学性能。多孔的分层结构化LLO微棒表现出最佳性能，放电容量为264.6 mAh g ^-1在0.5C下100次循环后保留率超过91％。在5C的高速率下，可以实现173.6mAh g ^-1的高放电容量。这项工作揭示了LLO阴极材料的形态与电化学性能之间的关系，并为制造用于锂离子电池的坚固而高性能的电极材料提供了一种可行的方法。