Electrical conductivity of olivine type LiFe0.965Cr0.03B0.005PO4 and LiFe0.965Cr0.03Al0.005PO4 powders (올리빈형 LiFe0.965Cr0.03B0.005PO4 and LiFe0.965Cr0.03Al0.005PO4 분말의 전기전도도)

Chang-Sam Kim (김창삼)

Electrical conductivity of olivine type LiFe0.965Cr0.03B0.005PO4 and LiFe0.965Cr0.03Al0.005PO4 powders

Journal of the Korean Crystal Growth and Crystal Technology
Abbr : J. Korean Cryst. Growth Cryst. Technol.
2010, 20(3), pp.141-146
Publisher : The Korea Association Of Crystal Growth, Inc.
Research Area : Engineering > Materials Science and Engineering

Chang-Sam Kim ¹

¹한국과학기술연구원

Accredited

ABSTRACT

LiFePO4 doped with Cr showed improved electrochemical properties as a cathode material of lithium-ion batteries compared to the undoped. The improvement was thought that the doping would raise the electronic conductivity of the compounds. The electrical conductivity of LiFe0.965Cr0.03B0.005PO4 and LiFe0.965Cr0.03Al0.005PO4 powder was measured in the temperature range from 30 to 80oC. The doped powders were synthesized via mechanochemical milling and subsequent heat treatment at 675~750oC for 5~10 h. The doping enhanced grain growth and electrical conductivity. The electrical conductivity of the LiFe0.965Cr0.03Al0.005PO4 powder at 30oC was 1 × 10−8S/cm, which was higher two orders of magnitude than that of the undoped.

KEYWORDS

Lithium ion battery, Cathode, LiFePO4, Electrical conductivity, Doping

Citation status

* References for papers published after 2023 are currently being built.

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Journal of the Korean Crystal Growth and Crystal Technology 2023 KCI Impact Factor : 0.19