Sb2O3-modified LiNi1/3Co 1/3Mn1/3O2 material with enhanced thermal safety and electrochemical property

Zenghui Han, Jinpeng Yu, Hui Zhan, Xingjiang Liu, Yunhong Zhou

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The layered LiMO2 (M = Ni, Co and Mn) materials LiNi 1/3Co1/3Mn1/3O2 and LiNi 0.4Co0.2Mn0.4O2 are synthesized by rheological phase method. Sb2O3-modified phases are further obtained by mechanical ball milling treatment. The structure and morphology of the bare and modified samples are characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Charge/discharge tests indicate that the modified phases all improve cycling stability, rate capability and thermal safety. Careful comparison of the charge/discharge profiles reveals that the serious polarization increment in cycling is suppressed in the Sb2O3-modified LiMO 2 electrodes. AC impedance shows that Sb2O 3/LiNi1/3Co1/3Mn1/3O2 electrode has smaller Rct and Rf value. Further analysis proves that Sb2O3 hinders the reaction between electrolyte and cathode during charge/discharge process and helps to stabilize the SEI. Other experiments prove that using Sb2O3-coated separator can achieve similar positive effect on layered LiMO2 cathode.

Original languageEnglish
Pages (from-to)106-111
Number of pages6
JournalJournal of Power Sources
Volume254
DOIs
Publication statusPublished - 2014 May 15

Keywords

  • Antimony oxide
  • Electrochemical performance
  • Layered material
  • Lithium ion battery
  • Thermal safety

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Physical and Theoretical Chemistry

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