Performance of layered Li(Ni1/3Co1/3Mn1/3)O2 as cathode for Li-ion batteries
Performance of layered Li(Ni1/3Co1/3Mn1/3)O2 as cathode for Li-ion batteries
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DOI：
10.1016/s0013-4686(02)00593-5
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发表时间：
2002-11-21
影响因子：
6.6
通讯作者：
Chowdari, BVR
中科院分区：
文献类型：
--
作者：
Shaju, KM;Rao, GVS;Chowdari, BVR
采用混合氢氧化物法制备了层状Li(Ni1/3CO1/3Mn1/3)O-2，并通过X射线衍射、X射线光电子能谱(XPS)、循环伏安法和充放电循环对其进行了表征。该化合物获得的六方晶格参数为：a = 2.864 和 c = 14.233 埃。 XPS研究表明，化合物中Ni、Co和Mn的主要氧化态分别为2+、3+和4+，其中Ni3+和Mn3+离子含量很少。在2.5-4.4 V范围内和30 mA/g的比电流下获得了160 mAh/g的初始放电容量，其中在40次充放电循环结束时保留了143 mAh/g。在较低电流（10 mA/g）和2.5-4.7 V电压窗口内，可以获得215 mAh/g的放电容量。根据电压分布和循环伏安法，在类似于 3.8 V 和类似于 4.6 V 的电压下发生的氧化还原过程分别归属于 Ni2+/(4+) 和 Co3+/(4+) 对。 (C) 2002 年，爱思唯尔科学有限公司出版。
Layered Li(Ni1/3CO1/3Mn1/3)O-2 was prepared by mixed hydroxide method and characterised by means of X-ray diffraction, X-ray photoelectron spectroscopy (XPS), cyclic voltammetry and charge-discharge cycling. The hexagonal lattice parameters obtained for the compound are: a = 2.864 and c = 14.233 Angstrom. XPS studies show that the predominant oxidation states of Ni, Co and Mn in the compound are 2 +, 3 + and 4 +, respectively with small content of Ni3+ and Mn3+ ions. Initial discharge capacity of 160 mAh/g was obtained in the range 2.5-4.4 V and at a specific current of 30 mA/g of which 143 mAh/g was retained at the end of 40 charge-discharge cycles. At lower current (10 mA/g) and in the voltage window 2.5-4.7 V, discharge capacity of 215 mAh/g is obtainable. From the voltage profile and cyclic voltammetry, the redox processes occurring at similar to 3.8 and similar to 4.6 V are assigned to the Ni2+/(4+) and Co3+/(4+) couples, respectively. (C) 2002 Published by Elsevier Science Ltd.