Abstract Li-rich layered oxide has been consistently studied especially due to its high lithium storage capability. Here, Fe-based Li-rich cathode material (Li[Li0.1Fe0.18Ni0.27Mn0.45]O2) with a novel proportion has been successfully synthesized by a simple basic molten salt method using an eutectic mixture of LiNO3-LiOH·H2O. Compared to solution chemistry (co-precipitation method), the molten salt environment leads to fine particles with a well-defined layered structure. The prepared material delivers a reversible specific capacity of 220.1 mA h g−1 after 43 cycles in the voltage range of 2–4.8 V at 20 mA g−1, which is much higher than that of the other reported Fe-containing Li-rich cathode materials. Such superior charge-discharge capacity can be mainly attributed to the gradually activation of electrochemical reactions below 3.5 V and over 4.2 V during cycling. These Li-rich materials prepared by molten salt method are considered promising cathode materials for high-capacity lithium-ion batteries.

中文翻译：

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新型铁基富锂锂离子电池正极材料的电化学活化

摘要 富锂层状氧化物因其高储锂能力而受到持续研究。在这里，使用LiNO3-LiOH·H2O的共晶混合物通过简单的碱性熔盐法成功合成了具有新比例的Fe基富锂正极材料（Li[Li0.1Fe0.18Ni0.27Mn0.45]O2） . 与溶液化学（共沉淀法）相比，熔盐环境产生具有明确分层结构的细颗粒。所制备的材料在 20 mA g-1 下在 2-4.8 V 的电压范围内循环 43 次后可提供 220.1 mA hg-1 的可逆比容量，远高于其他报道的含铁富锂正极材料。这种优异的充放电容量主要归因于电化学反应在 3.5V 以下和 4V 以上逐渐激活。骑车时为 2 V。这些通过熔盐法制备的富锂材料被认为是有前途的高容量锂离子电池正极材料。