LiAlδNi1-δO2 solid solutions as cathodic materials for rechargeable lithium batteries

被引：65

作者：

Wang, GX ^{[1
]}

Zhong, S ^{[1
]}

Bradhurst, DH ^{[1
]}

Dou, SX ^{[1
]}

Liu, HK ^{[1
]}

机构：

[1] Univ Wollongong, Inst Superconducting & Elect Mat, Energy Storage Mat Program, Wollongong, NSW 2522, Australia

来源：

SOLID STATE IONICS | 1999年 / 116卷 / 3-4期

关键词：

LiAl delta Ni1-delta O2 solid solutions; rechargeable lithium batteries; ac impedance spectroscopy;

D O I：

10.1016/S0167-2738(98)00351-8

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：

Layered LiAldeltaNi1-deltaO2 solid solutions were synthesised via a solid-state reaction at 750 degrees C under an oxygen stream. Single phase LiAldeltaNi1-deltaO2 compounds were obtained. The structural integrity of the electrode could be preserved via an inert Al3+ dopant effect to prevent the overcharge of the electrode, which is beneficial for long cycle life of the cell. The LiAldeltaNi1-deltaO2 electrode delivered approximately 150-160 mAh/g discharge capacity between 3 and 4.3 V, which is similar to LiNiO2. A.c. impedance spectroscopy was employed to characterise the kinetic parameters of LiAldeltaNi1-deltaO2 electrodes in lithium cells combined with the galvanostatic intermittent titration technique (GITT). It was found that the Al3+ dopant effect could decrease the charge-transfer resistance (R-CT) and increase the Li-ion diffusion coefficient. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

引用

页码：271 / 277

页数：7

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