Electrochemical evaluation of LiAl0.05Ni0.05Mn1.9O4 cathode material synthesized via electrospinning method

被引：59
作者：
Ding, Xianan [1 ,2 ]
Zhou, Hongwei [1 ,2 ]
Liu, Guicheng [3 ]
Yin, Zhuang [1 ,2 ]
Jiang, Ying [1 ,2 ]
Wang, Xindong [1 ,2 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Dept Phys Chem, Beijing 100083, Peoples R China
[3] Chinese Acad Sci, Beijing Inst Nanoenergy & Nanosyst, Beijing 100083, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 632卷
基金：
国家高技术研究发展计划(863计划);
关键词：
Lithium ion battery; Lithium manganese oxide; Nanofiber; Electrospinning; Double doping; SPINEL CATHODES; LIMN2O4; PERFORMANCE; ELECTRODES; POWDERS; POWER; NI;
D O I：
10.1016/j.jallcom.2015.01.163
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：
One-dimensional LiAl0.05Ni0.05Mn1.9O4 nanofibers are prepared by an electrospinning method followed by calcination process to investigate the influences of Al/Ni dual-doping on the structural and electrochemical properties of as-prepared cathode materials for Li-ion batteries. X-ray diffraction (XRD) and scanning electron microscope (SEM) characterization results indicate that the as-prepared material have good crystallinity and uniform morphology. Galvanostatic charge-discharge tests demonstrate LiAl0.05Ni0.05Mn1.9O4 has an improved cyclic performance at 25 degrees C and high temperature (55 degrees C), which originates from the enhanced stability by decreasing lattice constant and suppression of Jahn-Teller effect revealed by XPS analysis. Moreover, From the EIS analysis, it is revealed reduced charge transfer resistance of LiAl0.05Ni0.05Mn1.9O4 compared with those of undoped LiMn2O4. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：147 / 151
页数：5
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