Preparation and electrochemical properties of layer-structured LiNi1/3Co1/3Mn1/3-yAlyO2

被引：30

作者：

Lin, Yu-Kai ^{[1
]}

Lu, Chung-Hsin ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Chem Engn, Elect & Electroopt Ceram Lab, Taipei 10764, Taiwan

来源：

JOURNAL OF POWER SOURCES | 2009年 / 189卷 / 01期

关键词：

Layered structure; Sol-gel; Cathode materials; Lithium-ion batteries; ION; INTERCALATION; BATTERIES; OXIDES;

D O I：

10.1016/j.jpowsour.2008.08.072

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Layer-structured LiNi(1/3)Co(1/3)Mn(1/3-y)AlyO(2) has been synthesized via a sol-gel method. The lattice constants of LiNi1/3Co1/3Mn1/3-yAlyO2 decrease with the concentration of aluminum ions. XANES analysis further confirms that the valence of cobalt ion is 3+, and that of Ni is between 2+ and 3+ in LiNi1/3Co1/3Mn1/3-yAlyO2. With doping aluminum ions, the redox centers for the electrochemical reaction change from nickel ions alone to both nickel and cobalt ions. The amounts of de-intercalatable lithium ions are affected by the concentration of aluminum ions; however, the extracting efficiency of lithium ions is improved by doping aluminum ions. Among all the samples, LiNi1/3Co1/3Mn0.23Al0.1O2 exhibits the best capacity retention and the least irreversible capacity. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：353 / 358

页数：6

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