Preparation and Cyclic Performance of Li1.2(Fe0.16Mn0.32Ni0.32)O2 Layered Cathode Material by the Mixed Hydroxide Method

被引：6

作者：

Karthikeyan, K. ^{[1
]}

Nam, K. W. ^{[2
]}

Hu, E. Y. ^{[2
]}

Yang, X. Q. ^{[2
]}

Lee, Y. S. ^{[1
]}

机构：

[1] Chonnam Natl Univ, Fac Appl Chem Engn, Kwangju 500757, South Korea

[2] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA

来源：

BULLETIN OF THE KOREAN CHEMICAL SOCIETY | 2013年 / 34卷 / 07期

基金：

新加坡国家研究基金会;

关键词：

Mixed hydroxide method; Lithium Mn oxide; XANES; Layered materials; Lithium batteries; X-RAY-DIFFRACTION; IN-SITU;

D O I：

10.5012/bkcs.2013.34.7.1995

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Layered Li-1.2(Fe0.16Mn0.32Ni0.32)O-2 was prepared by the mixed hydroxide method at various temperatures. X-ray diffraction (XRD) pattern shows that this material has a alpha-NaFeO2 layered structure with R (3) over barm space group and that cation mixing is reduced with increasing synthesis temperature. Scanning electron microscopy (SEM) reveals that nano-sized Li-1.2(Fe0.16Mn0.32Ni0.32)O-2 powder has uniform particle size distribution. X-ray absorption near edge structure (XANES) analysis is used to study the local electronic structure changes around the Mn, Fe, and Ni atoms in this material. The sample prepared at 700 degrees C delivers the highest discharge capacity of 207 mAhg(-1) between 2-4.5 V at 0.1 mAcm(-2) with good capacity retention of 80% after 20 cycles.

引用

页码：1995 / 2000

页数：6

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