Electrochemical evaluation of LiZnxMn2-xO4 (x≤0.10) cathode material synthesized by solution combustion method

Wangqiong Xu, Qiling Li, Junming Guo, Hongli Bai, Chang wei Su, Rongsheng Ruan, Jinhui Peng

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The spinel LiZnxMn2-xO4 (x≤0.10) cathode materials have been synthesized by solution combustion method at 600 °C for 3 h. The structure and the morphology of LiZnxMn2-xO4 were characterized by X-ray diffraction (XRD) analysis and scanning electron microscopy (SEM), respectively. All the obtained samples were identified as the spinel structure of LiMn2O4, the lattice parameters of samples decreased and the particle size increased as the Zn content increased. The effects of Zn-doping on the electrochemical characteristics of LiMn2O4 were investigated by galvanostatic charge-discharge experiments, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Among them, LiZn0.05Mn1.95O4 particles presented outstanding cycling stability with a capacity retention of 82.9% at a discharge rate of 1 C (1 C=148 mA h g-1) after 500 cycles. Spinel LiZn0.05Mn1.95O4 had reversible cycling performance, revealing that doping LiMn2O4 with Zn improves its electrochemical performance.

Original languageEnglish (US)
Pages (from-to)5693-5698
Number of pages6
JournalCeramics International
Volume42
Issue number5
DOIs
StatePublished - Apr 1 2016

Bibliographical note

Funding Information:
This work was financially supported by the National Natural Science Foundation of China ( 51262031 , 51462036 ), Program for Innovative Research Team (in Science and Technology) in University of Yunnan Province ( 2011UY09 ), Yunnan Provincial Innovation Team ( 2011HC008 ), and Innovation Program of Yunnan Minzu University ( 2015TX09 , 2015YJCXZ24 , 2015YJCXZ21 ).

Publisher Copyright:
© 2016 Elsevier Ltd and Techna Group S.r.l.

Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.

Keywords

  • Cathode material
  • Li-ion batteries
  • LiMnO
  • Solution combustion method
  • Zn-doping

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