Structural Properties of LiNi1-yCoyO2 (0≤y≤1) Synthesized Wet Chemistry via Malic Acid-Assisted Technique

被引：11

作者：

Mazas-Brandariz, D. ^{[1
]}

Senaris-Rodriguez, M. A. ^{[1
]}

Castro-Garcia, S. ^{[1
]}

Camacho-Lopez, M. A. ^{[2
]}

Julien, C. ^{[2
]}

机构：

[1] Univ A Coruna, Dept Quim Fundamental & Ind, La Coruna 15071, Spain

[2] Univ Paris 06, LMDH, UMR7603, F-75252 Paris, France

来源：

IONICS | 1999年 / 5卷 / 5-6期

关键词：

Titration; FTIR Spectroscopy; Calcination; Lattice Constant; Single Phase;

D O I：

10.1007/BF02375998

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：

We have synthesized LiNi1-yCOyO2 powders by a sol-gel method using malic acid as a chelating agent. The dependence of physico-chemical properties of the powders (crystallinity, lattice constants, grain size) has been investigated by changing the malic acid quantity and the calcination temperature for the different LiNi1-yCOyO2 oxides in the composition range 0 <= y <= 1. Structural studies show that a layered single phase was obtained for the y values 0.2 <= y <= 1.0. The local cationic environment has been studied by Raman and FTIR spectroscopy. Using acid-assisted LiNi1-yCOyO2 powders (with compositions y = 0.8 and y = 0.6) calcined at 800 degrees C, Li//LiNi1-yCOyO2 cells were assembled and tested by galvanostatic titration. These cells had an initial capacity of 140 mAh/g in the voltage range 2.8-4.2 V and showed attractive charge-discharge profiles upon cycling.

引用

页码：345 / 350

页数：6

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