Structural, transport and electrochemical properties of LiNi0.5-yCuyMn1.5O4-δ spinel cathode materials

被引：17
|
作者：
Milewska, A. [1 ]
Kondracki, L. [1 ]
Molenda, M. [2 ]
Bakierska, M. [2 ]
Molenda, J. [1 ]
机构：
[1] AGH Univ Sci & Technol, Fac Energy & Fuels, Dept Hydrogen Energy, PL-30059 Krakow, Poland
[2] Jagiellonian Univ, Fac Chem, PL-30060 Krakow, Poland
来源：
SOLID STATE IONICS | 2014年 / 267卷
关键词：
Li-ion batteries; Cathode material; Spinel; Cu doping; Ni doping; Transport properties; MANGANESE SUBLATTICE; 3D SUBSTITUTIONS; LITHIUM; BATTERY; CONDUCTIVITY; ELECTRODES; LIMN2O4; PHASE; NI;
D O I：
10.1016/j.ssi.2014.09.004
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：
In this paper structural, transport and electrochemical characterization of series of LiNi0.5-yCuyMn1.5O4 (y = 0, 0.02 and 0.05) cathode materials synthesized using sol-gel method are presented. We observed influence of annealing temperature on the lattice constant length, related to degree of oxygen nonstoichiometry. We found a correlation between activation energy of electrical conductivity and the lattice constant parameter. Among the analyzed materials the best electrical conductivity revealed LiNi0.48Cu0.02Mn1.5O4 annealed at 800 degrees C. Charge curves of the cells exhibited 4.7 V-plateau related to oxidation of Ni2+ to Ni4+ and 4 V region related to oxidation of Mn3+ to Mn4+. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：27 / 31
页数：5
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