Surfactant-coassisted sol-gel synthesis to prepare LiNiyMnyCo1-2yO2 with improved electrochemical behavior

被引：11

作者：

Bhuvaneswari, D. ^{[1
]}

Gangulibabu ^{[1
]}

Kalaiselvi, N. ^{[1
]}

机构：

[1] CSIR Cent Elect Res Inst, Karaikkudi 630006, Tamil Nadu, India

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2012年 / 16卷 / 11期

关键词：

Sol-gel method; Surfactant; Layered oxide cathodes; Lithium batteries; Spherical morphology; LITHIUM-ION BATTERIES; LI-ION; CATHODE MATERIALS; PERFORMANCE; LINI1/3CO1/3MN1/3O2; ELECTRODE;

D O I：

10.1007/s10008-012-1810-8

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Layered LiNi (y) Mn (y) Co1 - 2y O-2 [y = 0.5, 0.45, and 0.4] compounds with interconnected spherical particles are synthesized using a novel surfactant-coassisted sol-gel process. A combination of cetyltrimethyl ammonium bromide as surfactant and citric acid as chelating agent results in the formation of hydrophobically nucleated transparent gel, which upon furnace calcination yields phase pure and growth-controlled spherical particles of LiNi (y) Mn (y) Co1 - 2y O-2 [y = 0.5, 0.45, and 0.4] compounds. The compounds containing Co3+ ions, viz., LiNi0.45Mn0.45 C0.1O2 and LiNi0.4Mn0.4Co0.2O2 cathodes, exhibit good cation ordering and better electrochemical performance than LiNi0.5Mn0.5O2 cathode. The study demonstrates the superiority and suitability of LiNi0.4Mn0.4Co0.2O2 cathode over LiNi0.5Mn0.5O2 and LiNi0.45Mn0.45Co0.1O2 cathodes at 1 C rate and up to 4.6 V limit.

引用

页码：3667 / 3674

页数：8

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