Controlled synthesis of lithium-rich layered Li1.2Mn0.56Ni0.12Co0.12O2 oxide with tunable morphology and structure as cathode material for lithium-ion batteries by solvo/hydrothermal methods
Controlled synthesis of lithium-rich layered Li1.2Mn0.56Ni0.12Co0.12O2 oxide with tunable morphology and structure as cathode material for lithium-ion batteries by solvo/hydrothermal methods
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采用溶剂/水热法控制合成形貌和结构可调的富锂层状Li1.2Mn0.56Ni0.12Co0.12O2氧化物作为锂离子电池正极材料
DOI：
10.1016/j.jallcom.2014.08.191
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发表时间：
2015-01-05
影响因子：
6.2
通讯作者：
Yao, Jiannian
中科院分区：
文献类型：
--
作者：
Fu, Fang;Huang, Yiyin;Yao, Jiannian
采用溶剂热法和水热法制备了不同形貌的富锂层状正极材料Li1.2Mn0.56Ni0.12Co0.12O2（0.5Li（2）MnO（3）中心点0.5Li（1.2）Mn（0.4）Ni（0.3）Co（0.3）O（2））。结果表明，溶剂在形成各种形状和尺寸的前驱体和最终产物中起着至关重要的作用。作为锂离子电池正极材料，溶剂热法制备的样品具有较高的放电容量、良好的循环性能和优异的倍率容量。在0.2 C下的放电容量为306.9 mA h g（-1），在5.0 C的高倍率下的放电容量为118.6 mA h g（-1）。溶剂热法制备的样品具有良好的有序结构和明确的形貌，粒径较小，分布均匀，是其优异性能的主要原因。本研究为制备高性能层状富锂电池正极材料提供了新的思路和方法。(C)2014爱思唯尔有限公司版权所有。
A Li-rich layered cathode material Li1.2Mn0.56Ni0.12Co0.12O2 (0.5Li(2)MnO(3)center dot 0.5Li(1.2)Mn(0.4)Ni(0.3)Co(0.3)O(2)) with different morphologies has been successfully prepared by solvothermal and hydrothermal methods. The result demonstrates that the solvent plays a crucial role in the formation of the precursor and final product with various shapes and sizes. When tested as the cathode material for lithium ion batteries, the sample prepared by solvothermal method exhibits higher discharge capacity, better cycling performance, and more excellent rate capacity. It delivers a discharge capacity of 306.9 mA h g(-1) at 0.2 C and 118.6 mA h g(-1) even at a high rate of 5.0 C. The outstanding performance of the sample prepared by solvothermal method can be attributed to the well-ordered structure and well-defined morphology with smaller particle size and uniform distribution. The current study paves a new concept and applicable way to prepare high performance Li-rich layered cathode material for LIBs. (C) 2014 Elsevier B.V. All rights reserved.