Synthesis, Characterization, and Thermal Stability of Li[Ni1/3Mn1/3Co1/3-z(MnMg)z/2]O2

被引：64

作者：

Luo, Wenbin ^{[1
,2
]}

Li, Xinhai ^{[2
]}

Dahn, J. R. ^{[1
]}

机构：

[1] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 3J5, Canada

[2] Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Hunan, Peoples R China

来源：

CHEMISTRY OF MATERIALS | 2010年 / 22卷 / 17期

基金：

加拿大自然科学与工程研究理事会;

关键词：

LITHIUM INSERTION MATERIAL; ELECTROCHEMICAL PROPERTIES; CATHODE MATERIALS; LICO1/3NI1/3MN1/3O2; ELECTROLYTE; X=0;

D O I：

10.1021/cm1017163

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：

LiNi1/3Mn1/3Co1/3-z(MnMg)(z/2)O-2(0 <= z <= 1/3) samples were prepared from hydroxide precursors. The hydroxide precursors were heated with Li2CO3 at 900 degrees C for 3 h to prepare the oxides. The XRD results show single phase LiNi1/3Mn1/3Co1/3-z(MnMg)(z/2)O-2 samples can be prepared for 0 <= z <= 1/3. Rietveld refinements of XRD data show that when Mn and Mg substitute for Co in NMC there is an increase in the amount of transition metal in the Li layer. Electrochemical studies of the LiNi1/3Mn1/3Co1/3-z(MnMg)(z/2)O-2 (0 <= z <= 1/3) samples were used to measure the rate of capacity reduction with z, found to be about 250 (mAh/g)/(z = 1) charging to 4.3 V and 150 (mA h/g)/ (z = 1) charging to 4.6 V. The impact of Mn and Mg cosubstitution on the thermal stability of charged LiNi1/3Mn1/3Co1/3-z(MnMg)(z/2)O-2 (0 <= z <= 1/3) samples in electrolyte was studied using accelerating rate calorimetry. The thermal stability of LiNi1/3Mn1/3Co1/3-z(MnMg)(z/2)O-2 is independent of z for the samples studied.

引用

页码：5065 / 5073

页数：9

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