Template synthesis and lithium storage performances of hollow spherical LiMn2O4 cathode materials

被引：21
作者：
Chen, Penghui [1 ]
Wu, Hao [1 ]
Huang, Sisi [1 ]
Zhang, Yun [1 ]
机构：
[1] Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610064, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2016年 / 42卷 / 08期
关键词：
LiMn2O4; Template synthesis; Ca2+/Mn2+ ratio; Cathode materials; Lithium-ion batteries; ION BATTERIES; SPINEL; CELLS; CAPABILITY; NANOWIRES; DISCHARGE; NANOTUBE;
D O I：
10.1016/j.ceramint.2016.03.081
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Hollow-structured LiMn2O4 microspheres were successfully prepared via a template strategy, in which xMnCO(3)center dot yCaCO(3) spheres, obtained by a co-precipitation method, served as hard templates for synthesizing hollow spherical LiMn2O4 cathode materials. The effects of Ca2+/Mn2+ ratio of raw materials on the morphology and electrochemical performances of the resultant LiMn2O4 were investigated. SEM results indicated that the LiMn2O4 sample prepared at a Ca2+/Mn2+ ratio of 3:2 exhibited a well formed hollow spherical morphology with minor collapse in the structure, thus enabling larger capacity (125 mA h g(-1) at 1 C), higher rate capability (94.4 mA h g(-1) at 5 C), and better cycling stability (90% capacity retention after 100 cycles) compared to other LiMn2O4 samples. This template method provides a viable and inexpensive route to mass production of LiMn2O4-based cathode materials for lithium-ion batteries. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：10498 / 10505
页数：8
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