Improvement of structural integrity and battery performance of LiNi0.5Mn0.5O2 by Al and Ti doping

被引：54

作者：

Myung, ST ^{[1
]}

Komaba, S ^{[1
]}

Hirosaki, N ^{[1
]}

Hosoya, K ^{[1
]}

Kumagai, N ^{[1
]}

机构：

[1] Iwate Univ, Grad Sch Engn, Dept Frontier Mat & Funct Engn, Morioka, Iwate 0208551, Japan

来源：

JOURNAL OF POWER SOURCES | 2005年 / 146卷 / 1-2期

关键词：

lithium-ion battery; cathode; lithium intercalation; emulsion drying method;

D O I：

10.1016/j.jpowsour.2005.03.083

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：

LiNi0.5Mn0.50O2, LiNi0.475Al0.05Mn0.475O2, and LiNi0.5Mn0.45Ti0.05O2 were prepared via the emulsion drying method. The as-prepared materials showed different degrees of cation mixing. Rietveld refinement of X-ray diffraction data revealed that A] and Ti doping in LiNi0.5Mn0.5O2. was significantly effective to decrease the cation mixing in the octahedral Li layers. The cation mixing consequently affected to the charge and discharge capacities. The irreversible capacity was the smallest for the Al doped LiNi(0.5)Nn(0.5)O(2), which showed the smallest cation mixing. Al and Ti doped LiNi0.5Mn0.5O2 delivered a stable capacity of about 175 mAh g(-1) with high reversibility. Such higher capacities were possible to be obtained by the achievement of structural stabilization and enhancement of structural integrity by Al and Ti doping in LiNi(0.5)Nn(0.5)O(2). (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：645 / 649

页数：5

共 13 条

[1]

Ammundsen B, 2001, ADV MATER, V13, P943, DOI 10.1002/1521-4095(200107)13:12/13<943::AID-ADMA943>3.0.CO

[2]

2-J

[3] Structural and electrochemical properties of LiNi0.70Co0.15Al0.15O2 [J].

Guilmard, M ;

Pouillerie, C ;

Croguennec, L ;

Delmas, C .

SOLID STATE IONICS, 2003, 160 (1-2) :39-50

[4] LiAlyCo1-yO2 (R(3)over-bar-m) intercalation cathode for rechargeable lithium batteries [J].

Jang, YI ;

Huang, BY ;

Wang, HF ;

Sadoway, DR ;

Ceder, G ;

Chiang, YM ;

Liu, H ;

Tamura, H .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1999, 146 (03) :862-868

[5] Synthesis, structure, and electrochemical behavior of Li[NixLi1/3-2x/3Mn2/3-x/3]O2 [J].

Lu, ZH ;

Beaulieu, LY ;

Donaberger, RA ;

Thomas, CL ;

Dahn, JR .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2002, 149 (06) :A778-A791

[6] Structural investigation of layered Li1-δMnxCr1-xO2 by XANES and in situ XRD measurements [J].

Myung, ST ;

Komaba, S ;

Hirosaki, N ;

Kumagai, N ;

Arai, K ;

Kodama, R ;

Nakai, I .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2003, 150 (12) :A1560-A1568

[7] Enhanced structural stability and cyclability of Al-doped LiMn2O4 spinel synthesized by the emulsion drying method [J].

Myung, ST ;

Komaba, S ;

Kumagai, N .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2001, 148 (05) :A482-A489

[8] Effects of Al doping on the microstructure of LiCoO2 cathode materials [J].

Myung, ST ;

Kumagai, N ;

Komaba, S ;

Chung, HT .

SOLID STATE IONICS, 2001, 139 (1-2) :47-56

[9] Preparation and electrochemical characterization of LiCoO2 by the emulsion drying method [J].

Myung, ST ;

Kumagai, N ;

Komaba, S ;

Chung, HT .

JOURNAL OF APPLIED ELECTROCHEMISTRY, 2000, 30 (09) :1081-1085

[10]

Ohzuku T, 2001, CHEM LETT, P744

← 1 2 →