Electrochemical properties of nano- and micro-sized LiNi0.5Mn1.5O4 synthesized via thermal decomposition of a ternary eutectic Li-Ni-Mn acetate

被引：50

作者：

Fang, X. ^{[1
]}

Lu, Y. ^{[1
]}

Ding, N. ^{[1
]}

Feng, X. Y. ^{[1
]}

Liu, C. ^{[1
]}

Chen, C. H. ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Anhui, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2010年 / 55卷 / 03期

基金：

美国国家科学基金会;

关键词：

Lithium nickel manganese oxide; Eutectic; Low temperature performance; Capacity retention; Lithium battery; LOW-TEMPERATURE PERFORMANCE; LITHIUM-ION BATTERIES; ASSISTED SYNTHESIS; CATHODE MATERIAL; FILM ELECTRODES; RATE CAPABILITY; SPINEL OXIDES; INSERTION;

D O I：

10.1016/j.electacta.2009.09.046

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Nano- and micro-sized LiNi0.5Mn1.5O4 particles are prepared via the thermal decomposition of a ternary eutectic Li-Ni-Mn acetate. Lithium acetate, nickel acetate and manganese acetate can form a ternary eutectic Li-Ni-Mn acetate below 80 degrees C. After further calcination, nano-sized LiNi0.5Mn1.5O4 particles can be obtained at an extremely low temperature (500 degrees C). When the sintering temperature goes above 700 degrees C, the particle size increases. and at 900 degrees C micro-sized LiNi0.5Mn1.5O4 particles (with a diameter of about 4 mu m) are obtained. Electrochemical tests show that the micro-sized LiNi0.5Mn1.5O4 powders (sintered at 900 degrees C) exhibit the best capacity retention at 25 degrees C, and after 100 cycles, 97% of initial discharge capacity can still be reached. Nano-sized LiNi0.5Mn1.5O4 powders (sintered at 700 degrees C) perform the best at low temperatures; when cycled at -10 degrees C and charged and discharged at a rate of 1 C, nano-sized LiNi0.5Mn1.5O4 powders can deliver a capacity as high as 110 mAhg(-1). (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：832 / 837

页数：6

共 31 条

[1] Structure and insertion properties of disordered and ordered LN0.5Mn1.5O4 spinels prepared by wet chemistry [J].