Synthesis of LiNi0.5Mn1.5O4 by solid-state reaction with improved electrochemical performance

被引：69

作者：

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

Shen, C. ^{[1
]}

Fang, X. ^{[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：

JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 08期

基金：

美国国家科学基金会;

关键词：

Lithium nickel manganese oxide; Cycling performance; Rate capability; Raman spectroscopy; Cyclic voltammetry; LITHIUM ION BATTERIES; CATHODE MATERIAL; INSERTION PROPERTIES; SPINEL LIMN2O4; COMBUSTION; CO;

D O I：

10.1016/j.jallcom.2010.12.116

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：

LiNi0.5Mn1.5O4 spinel samples were synthesized by a two-step solid-state reaction method. Manganese acetate and nickel acetate were mixed together in a molar ratio of 3:1 and reacted at 500 degrees C to form a mixed Ni-Mn oxide, which reacted subsequently with lithium acetate at 900 degrees C to form a LiNi0.5Mn1.5O4 powder. For comparison, manganese acetate, nickel acetate and lithium acetate were mixed together in a molar ratio of 3:1:2 and directly reacted in one-step at 900 degrees C. The LiNi0.5Mn1.5O4 powder synthesized from the two-step process shows enhanced conductivity and improved rate performance. X-ray diffraction and Raman spectroscopy analyses indicate that the two-step sample has a space group of Fd (3) over barm while the one-step sample has a space group of P4(3)32. The cyclic voltammetry test has confirmed that lithium-ion cells with the two-step sample in the positive electrode exhibit lower impedance than those with the one-step sample. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：3623 / 3626

页数：4

共 21 条

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