Electrochemical study of LiMn1.5Ni0.5O4 spinel oxides prepared by two-step process

被引：5
|
作者：
Hanafusa, R. [1 ]
Kotani, K. [1 ]
Ishidzu, K. [1 ]
Oka, Y. [1 ]
Nakamura, T. [1 ]
机构：
[1] Univ Hyogo, Grad Sch Engn, Div Elect Mat & Devices, Dept Elect Engn & Comp Sci, 2167 Shosha, Himeji, Hyogo 6712201, Japan
来源：
SOLID STATE IONICS | 2016年 / 288卷
关键词：
High-voltage cathode; Spinel oxides; Charge-discharge properties; Low-temperature magnetic study; PERFORMANCE;
D O I：
10.1016/j.ssi.2016.01.037
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：
High-voltage cathode material, LiMn1.5Ni0.5O4, was successfully prepared by two-step process: LiMn1.6Ni0.4O4 particles were obtained by the solid state reaction of oxalate precursors at high temperature such as 900 degrees C and then the LiMn1.6Ni0.4O4 particles with Li-acetate di-hydrate and Ni-acetate tetra-hydrate were annealed at low temperature. Both spinel phases are ferromagnetic compounds: LiMn1.5Ni0.5O4 has higher Neel temperature (127 K) and larger magnetization (97 emu/g at 4.2 K) than LiMn1.6Ni0.4O4 does (103 K and 79 emu/g). The obtained LiMn1.5Ni0.5O4 particles had low specific surface area, which may reduce the side reaction with the organic electrolyte, and exhibited electrochemical capacity only at high voltage 4.7 V region. In addition, high reversible capacity as well as good cycle performance was attained. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：180 / 183
页数：4
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