Articles
  • Electrochemical and structural properties of carbon-coated LiFe0.2Mn0.8PO4 cathode

  • Ung Jae Jeona,†, Tae-Yeon Shima,†, In-Ho Imc,*, Kyong-Nam Kimb,* and Seung-Hwan Leea,*

  • aDepartment of Battery Convergence Engineering, Kangwon National University, Chuncheon 24341, Republic of Korea
    bDepartment of Semiconductor Engineering, Daejeon University, Daejeon 34520, Republic of Korea
    cDepartment of Electrical Engineering, Shinansan University, Ansan 15435, Republic of Korea

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Olivine-structured LiFePO4 is anticipated as a promising cathode material for lithium-ion batteries and lithium polymer batteries. In our research group, we synthesized homogeneous and fine particles of LiFePO4 and LiFe0.2Mn0.8PO4 using mechanical alloying (MA) to address the low electrical conductivity and lithium ion diffusion rate of LiFePO4. LiFe0.2Mn0.8PO4 exhibited similar structural characteristics to LiFePO4, yet it demonstrated superior electrochemical properties. It achieved a capacity of 159.4 mAh/g, an electrical conductivity of 4.9 × 10-7 S/cm, excellent cycle and rate performance, and a lithium ion diffusion coefficient of 2.1 × 10-14 cm2 S-1. These findings highlight the effectiveness of mechanical alloying in enhancing the electrochemical performance of LiFePO4-based materials, paving the way for their application in advanced lithium-ion battery technologies.


Keywords: LiFePO4, LiFe0.2Mn0.8PO4, Electrical conductivity, Lithium ion diffusion coefficient.

This Article

  • 2024; 25(6): 937-940

    Published on Dec 31, 2024

  • 10.36410/jcpr.2024.25.6.937
  • Received on Mar 29, 2024
  • Revised on Nov 2, 2024
  • Accepted on Dec 15, 2024

Correspondence to

  • In-Ho Im c, Kyong-Nam Kim b and Seung-Hwan Lee a

  • aDepartment of Battery Convergence Engineering, Kangwon National University, Chuncheon 24341, Republic of Korea
    bDepartment of Semiconductor Engineering, Daejeon University, Daejeon 34520, Republic of Korea
    cDepartment of Electrical Engineering, Shinansan University, Ansan 15435, Republic of Korea
    Tel : +82-33-250-6265

  • E-mail: iminho@sau.ac.kr, knam1004@dju.kr, shlee@kangwon.a