Improved electrochemical performance of AlPO4-coated LiMn1.5Ni0.5O4 electrode for lithium-ion batteries

Jin Yi Shi, Cheol Woo Yi, Keon Kim

Research output: Contribution to journalArticle

95 Citations (Scopus)

Abstract

LiMn1.5Ni0.5O4 materials coated with AlPO4 are prepared by a sol-gel method with citric acid to improve their electrochemical performance; the physical and electrochemical properties are characterized by various analytical techniques. The coated AlPO4 layer completely covers the surfaces of the LiMn1.5Ni0.5O4 particles and the thickness of the coated layer is ∼15 nm. 1 wt.% AlPO4-coated LiMn1.5Ni0.5O4 has much lower surface and charge-transfer resistances and shows a higher lithium diffusion rate in comparison with the pristine sample. The modified material demonstrates dramatically enhanced electrochemical reversibility and stability under elevated temperature conditions. This is because the coated AlPO4 layer reduces the contact area between the electrode and electrolyte and suppresses the formation of undesirable solid electrolyte interface films.

Original languageEnglish
Pages (from-to)6860-6866
Number of pages7
JournalJournal of Power Sources
Volume195
Issue number19
DOIs
Publication statusPublished - 2010 Oct 1

Fingerprint

electric batteries
lithium
Coated materials
Electrodes
electrodes
Solid electrolytes
Citric acid
Electrochemical properties
Lithium
Citric Acid
Sol-gel process
Electrolytes
Charge transfer
ions
Physical properties
citric acid
solid electrolytes
physical properties
charge transfer
electrolytes

Keywords

  • Cathode
  • Coating
  • Lithium-ion battery
  • Surface modification

ASJC Scopus subject areas

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

Cite this

Improved electrochemical performance of AlPO4-coated LiMn1.5Ni0.5O4 electrode for lithium-ion batteries. / Shi, Jin Yi; Yi, Cheol Woo; Kim, Keon.

In: Journal of Power Sources, Vol. 195, No. 19, 01.10.2010, p. 6860-6866.

Research output: Contribution to journalArticle

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