Synthesis of single-crystalline octahedral LiMn2O4 as high performance cathode for Li-ion battery

被引：37
作者：
Jin, Guanhua [1 ]
Qiao, Hang [1 ]
Xie, Hualin [2 ]
Wang, Haiyan [1 ]
He, Kejian [3 ]
Liu, Ping [1 ]
Chen, Jiajie [1 ]
Tang, Yougen [1 ]
Liu, Suqin [1 ]
Huang, Chenghuan [4 ]
机构：
[1] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China
[2] Yangtze Normal Univ, Sch Chem & Chem Engn, Fuling 408100, Peoples R China
[3] Cent S Univ, Adv Res Ctr, Changsha 410083, Hunan, Peoples R China
[4] Hunan Changyuan Lico Co Ltd, Changsha 410205, Hunan, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2014年 / 150卷
基金：
中国博士后科学基金;
关键词：
Li-ion battery; Spinel lithium manganese oxide; Octahedron morphology; Electrochemical performance; N; N-dimethyl formamide; RECHARGEABLE LITHIUM BATTERIES; HIGH-RATE CAPABILITY; ULTRASONIC SPRAY-PYROLYSIS; ELECTROCHEMICAL PERFORMANCE; MN3O4; NANOCRYSTALS; NANOWIRES; NANORODS; POWER; GROWTH; ELECTRODES;
D O I：
10.1016/j.electacta.2014.10.140
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
In this paper, we reported the synthesis of single-crystalline octahedral LiMn2O4 particles by a two-step method in which well-shaped octahedral Mn3O4 was easily obtained by the hydrothermal reaction of KMnO4 in water/N,N-dimethyl formamide (DMF) mixed solution and then transferred to LiMn2O4 by the solid-state lithiation process. High crystallinity and phase purity were also observed. When used as a cathode for Li-ion battery, the octahedral LiMn2O4 particles have demonstrated superior electrochemical properties in comparison with the LiMn2O4 particles by sol-gel method. A high initial discharge capacity of 122.7 mAh g(-1) was exhibited at 1C-rate and 104 mAh g(-1) maintained after 200 cycles for octahedral LiMn2O4. And good rate capability has also been achieved. The excellent electrochemical properties should be mainly attributed to the special octahedral morphology, single crystalline nature and high crystallinity. (C) 2014 Elsevier Ltd. All rights reserved.
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页码：1 / 7
页数：7
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