Synthesis, structure, and electrochemical characteristics of LiNi1/3Co1/3Mn1/3O2 prepared by thermal polymerization

被引：28

作者：

Ding, C. X. ^{[1
]}

Meng, Q. S. ^{[1
]}

Wang, L. ^{[1
]}

Chen, C. H. ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Mat Sci & Engn, Lab Adv Funct Mat & Devices, Hefei 230026, Anhui, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2009年 / 44卷 / 03期

基金：

美国国家科学基金会;

关键词：

Layered compounds; Ceramics; Chemical synthesis; X-ray diffraction; Electrochemical properties; POSITIVE ELECTRODE MATERIAL; EMULSION DRYING METHOD; LITHIUM-ION BATTERIES; COPRECIPITATION METHOD; CATHODE MATERIAL; LICO1/3NI1/3MN1/3O2; CRYSTAL; LI-1-XCO1/3NI1/3MN1/3O2; LINI1/3MN1/3CO1/3O2; INTERCALATION;

D O I：

10.1016/j.materresbull.2008.08.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A thermal polymerization route was adopted to synthesize layered LiNi1/3Co1/3Mn1/3O2 materials. After annealing the polymer gel containing metal salts at different temperatures from 850 to 1000 degrees C for different time between 6 and 25 h, powders of pure alpha-NaFeO2 phase were obtained. The crystal structure, morphology and electrochemical properties of the products were investigated by XRD, SEM, electrochemical cell cycling and AC impedance spectroscopy. It is found that the powder annealed at 950 degrees C for 15 h shows the best electrochemical property with the first specific discharge capacity of 188 mAh/g at C/10 and 87% retention after 100 cycles. It exhibits good rate capability with the specific capacity of 169 mAh/g at 1 C and 110 mAh/g at 6 C. Adopting a slowly cooling procedure during the powder annealing can improve the electrochemical performance of the LiNi1/3Co1/3Mn1/3O2 powder. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：492 / 498

页数：7

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