Articles
  • Enhanced electrochemical performance of peony flower-like carbon-coated γ-Ga2O3 nanosheets for lithium-ion battery anodes

  • Injun Jeona, Jin Hyun Hwanga, Tae Gyun Kima, Linghong Yina, Hyung Woo Leea,b, Jong Pil Kimc, Hyung Soo Ahnd and Chae Ryong Choa,b,*

  • aDepartment of Nano Fusion Technology, Pusan National University, Busan 46241, S. Korea
    bDepartment of Nanoenergy Engineering, Pusan National University, Busan 46241, S. Korea
    cBusan Center, Korea Basic Science Institute, Busan 46742, S. Korea
    dDepartment of Electronic Materials Engineering, Korea Maritime and Ocean University, Busan 49112, S. 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

Peony flower-like γ-Ga2O3 nanosheets (γ-Ga2O3 NSs) were synthesized and carbon layers were coated on their surfaces using a simple hydrothermal process with subsequent carbonization. The γ-Ga2O3 NSs comprised ultrathin layers, which are tens of nanometers in thickness. The carbon-coated γ-Ga2O3 NS (γ-Ga2O3@C NS) electrode exhibited a specific capacity of 598 mAh g-1 at 200 cycles, at a current density of 0.5 A g-1, higher than that of γ-Ga2O3 NSs (60 mAh g-1). Furthermore, a specific capacity of 100 mAh g-1 at 5 A g-1 was achieved owing to the low charge transfer resistance through the carbon layers. This study suggests that two-dimensional γ-Ga2O3@C NSs with both large specific area and high charge carrier transport are promising active materials for lithium-ion battery anodes with better electrochemical performance


Keywords: Lithium-ion battery, Anode, γ-Ga2O3, Carbon coating, Electrochemical performance

This Article

  • 2021; 22(2): 192-199

    Published on Apr 30, 2021

  • 10.36410/jcpr.2021.22.2.192
  • Received on Sep 1, 2020
  • Revised on Dec 3, 2020
  • Accepted on Dec 29, 2020

Correspondence to

  • Ryong Cho

  • aDepartment of Nano Fusion Technology, Pusan National University, Busan 46241, S. Korea
    bDepartment of Nanoenergy Engineering, Pusan National University, Busan 46241, S. Korea
    Tel : +82-55-350-5297 Fax: +82-51-514-2358

  • E-mail: crcho@pusan.ac.kr