Ordered LiNi0.5Mn1.5O4 hollow microspheres as high-rate 5 V cathode materials for lithium ion batteries

被引：34
作者：
Wu, W. W. [1 ]
Xiang, H. F. [1 ]
Zhong, G. B. [3 ]
Su, W. [3 ]
Tang, W. [1 ]
Zhang, Y. [1 ]
Yu, Y. [2 ]
Chen, C. H. [2 ]
机构：
[1] Hefei Univ Technol, Sch Mat Sci & Engn, Anhui Prov Key Lab Adv Funct Mat & Devices, Hefei 230009, Anhui, Peoples R China
[2] Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Anhui, Peoples R China
[3] Elect Power Res Inst Guangdong Power Grid Corp, Guangzhou 510080, Guangdong, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2014年 / 119卷
基金：
美国国家科学基金会;
关键词：
Lithium nickel manganese oxide; high-voltage cathode material; lithium-ion batteries; ELECTROCHEMICAL PROPERTIES; PERFORMANCE; SPINEL; ELECTRODE; NI; NANORODS; LIMN2O4; P4(3)32; SPHERES; ARRAYS;
D O I：
10.1016/j.electacta.2013.12.017
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Ordered LiNi0.5Mn1.5O4 hollow microspheres have been synthesized by an impregnation method followed by a simple solid-state reaction, and their electrochemical performance is investigated as cathode material for lithium ion batteries. The morphologies of the LiNi0.5Mn1.5O4 products prepared at different temperatures reveal that the formation for the hollow structure is tightly relative to the temperature for the solid-state reaction. Then ordered LiNi0,.5Mn1.5O4 hollow microspheres are formed under the solid-state reaction temperature of 800 degrees C along with post-annealing at 700 degrees C, but the sample prepared without post-annealing exists at the form of disordered structure. When the ordered LiNi0.5Mn1.5O4 hollow microspheres were applied as the cathode materials for lithium ion batteries, they exhibited superior rate capability (116 mAh g(-1) at 5C, 85 mAh g(-1) at 10 C for charge and discharge) and good cyclability, which are much better than the disordered sample. The durable high-rate capability was attributed to their single-crystal surface configuration that benefits fast Li insertion/extraction kinetics. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：206 / 213
页数：8
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