Research

Pohang University of Science and Technology

Research Topic

Ecofriendly, Cost-Effective Materials
for Li-ion Batteries:
LiFePO4 / SiO anode / Li-air battery

LiFePO4 cathode material is composed of non-toxic materials, it poses far less risk to the environment than other materials. SiO anode material has high research value due to its high capacity and low cost compared to graphite. Li-air battery is the ultimate goal for ensuring long-range-EVs while performing as green and lightweight energy storage system.

  • LiFePO4 cathode material is composed of non-toxic materials, it poses far less risk to the environment than other materials. SiO anode material has high research value due to its high capacity and low cost compared to graphite. Li-air battery is the ultimate goal for ensuring long-range-EVs while performing as green and lightweight energy storage system.

  • Fe-based cathode materials (LiFe1-xMxPO4, LiFeSO4F)

    Understanding material properties

    Improving material performance through structural transformation & new synthesis method

  • High Initial Coulombic Efficiency of SiO

    Crystallization reaction of the a-SiO2 matrix

    Crystallized SiO2 matrix in SiO

    Increase the Initial Coulombic Efficiency

  • Air-breathing batteries: Lithium-air batteries

    Mechanisms of Li-air batteries while charge & discharge

    Comparison of theoretical energy density with various types of LIBs

  • Related Paper

    1. B. Kang and G. Ceder, "Battery Materials for Ultrafast Charging and Discharging", Nature , 458, pp. 190-193 (2009)
    2. Kim, Minkyu, Yongjo Jung, and Byoungwoo Kang. "High electrochemical performance of 3.9 V LiFeSO 4 F directly synthesized by a scalable solid-state reaction within 1 h." Journal of Materials Chemistry A 3.14 (2015): 7583-7590.
    3. Kim, Minkyu, et al. "High rate li-ion batteries with cation-disordered cathodes." Joule 3.4 (2019): 1064-1079.
    4. Choi,Geunho; Kim,Jeonghan; Kang,Byoungwoo​, "High Initial Coulombic Efficiency of SiO Enabled by Controlling SiO2 Matrix Crystallization​", ACS Applied Materials & Interfaces, (2022)
    5. Geunho Choi+, Jeonghan Kim+ and Byoungwoo Kang, "Understanding limited reversible capacity of SiO electrode during 1st cycle and its effect on initial coulombic efficiency " Chemistry of Materials, (2019)​
    6. Minkyung Kim, Seongsu Lee, and Byoungwoo Kang,"Fast rate capable electrode material with higher energy density than LiFePO4:4.2V LiVPO4F synthesized by scalable single-step solid-state reaction", Advanced Science, (2015) invited paper