Synthesis and electrochemical properties of lithium non-stoichiometric Li1+x(Ni1/3Co1/3Mn1/3)O2+δ prepared by a spray drying method

被引：36

作者：

Kim, Jung-Min ^{[1
]}

Kumagai, Naoaki ^{[1
]}

Kadoma, Yoshihiro ^{[1
]}

Yashiro, Hitoshi ^{[1
]}

机构：

[1] Iwate Univ, Dept Frontier Mat & Funct Engn, Grad Sch Engn, Morioka, Iwate 0208551, Japan

来源：

JOURNAL OF POWER SOURCES | 2007年 / 174卷 / 02期

关键词：

battery; positive electrode; LiNi1/3Co1/3Mn1/3O2; spray drying; lithium excess;

D O I：

10.1016/j.jpowsour.2007.06.183

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：

Lithium non-stoichiometric Li[Li-x(Ni1/3Co1/3Mn1/3)(1-x)]O-2 materials (0 <= x <= 0.17) were synthesized using a spray drying method. The electrochemical properties and structural stabilities of the synthesized materials were investigated. The synthesized materials exhibited a hexagonal structure in all the x-value and the lattice parameters of the materials were gradually decreased with increasing x-value due to an increasing amount of W, ions for charge compensation. The capacity retention ability and rate capability of the stoichiometric Li(Ni1/3Co1/3Mn1/3)O-2 material were improved by increasing x-value, the so-called overlithiation. We found that the overlithiated materials could keep more structural integrity than the stoichiometric one during electrochemical cyclings, which could be one of reasons for a better electrochemical properties of the overlithiated materials. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：473 / 479

页数：7

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