Layered LT-LiNi1-yCoyO2 (0.3≤y≤0.7) Cathodes for Rechargeable Lithium Cells Synthesized by Co-precipitation Method

被引：5

作者：

Julien, C. ^{[1
]}

Michael, S. S. ^{[1
]}

机构：

[1] Univ Paris 06, CNRS, Lab Milieux Desordonnes & Heterogenes, UMR 7603, F-75252 Paris 05, France

来源：

IONICS | 1998年 / 4卷 / 3-4期

关键词：

Pyrolysis; Oxalic Acid; Cathode Material; Dicarboxylic Acid; LiPF6;

D O I：

10.1007/BF02375944

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 nickel-cobalt oxides were synthesized at low temperature using a precipitation method involving dissolution of metal acetates and Li(COOCH3) in oxalic acid (dicarboxylic acid). Pyrolysis of the precipitate at 400-600 degrees C produced single phase LiNi1-yCOyO2 (0.3 <= y <= 0.7) with submicron-sized particles. Oxalic acid acted as a fuel, decomposed the homogeneous precipitate of metal complexes at low temperature, and yielded the free impurity LiNi1-yCoyO2 compounds. The physicochemical properties of synthesized products were investigated by structural (XRD, SEM), spectroscopic (FTIR and Raman) and thermal (DTA/TG) analyses. The electrochemical properties of the LiNi1-yCoyO2 cathode materials were evaluated in rechargeable Li cells by employing a nonaqueous organic electrolyte mixture of 1M LiPF6 in EC+DMC. The cells maintained excellent cyclability at moderate charge-discharge rates.

引用

页码：181 / 190

页数：10

共 35 条

[1] THE USE OF ACETATES AS PRECURSORS FOR THE LOW-TEMPERATURE SYNTHESIS OF LIMN2O4 AND LICOO2 INTERCALATION COMPOUNDS [J].