Articles
  • Sn-modified LiNi0.9Co0.05Mn0.05O2 cathode with extraordinary electrochemical performances

  • Chea-Yun Kang and Seung-Hwan Lee*

  • Department of Materials Science and Engineering, Kangwon National University, Chuncheon 24341, 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

We report the synthesis of Sn-modified LiNi0.9Co0.05Mn0.05O2 cathode via a co-precipitation method. The key factor to enhance the electrochemical performances of lithium ion batteries is to suppress the structural reconstruction because of the irreversibility of the H2-H3 phase transition, resulting in rapid performance decay. The as-prepared Sn-modified LiNi0.9Co0.05Mn0.05O2 cathode delivers an initial discharge capacity of 221.4 mAh g-1 with a high coulombic efficiency of 88.5 %. Moreover, it shows better polarization of 0.33 V and superior cycle stability of 98.8% after 58 cycles. These values are obviously higher than those of pristine LiNi0.9Co0.05Mn0.05O2 cathode. Therefore, we can believe that Sn-modified LiNi0.9Co0.05Mn0.05O2 cathode is one of the effective way for high-performance cathode material in lithium ion batteries


Keywords: Sn-modified LiNi0.9Co0.05Mn0.05O2 cathode, structural reconstruction, H2-H3 phase transition, performance decay

This Article

  • 2022; 23(3): 243-246

    Published on Jun 30, 2022

  • 10.36410/jcpr.2022.23.3.243
  • Received on Jun 3, 2021
  • Revised on Sep 1, 2021
  • Accepted on Sep 25, 2021

Correspondence to

  • Seung-Hwan Lee

  • Department of Materials Science and Engineering, Kangwon National University, Chuncheon 24341, Republic of Korea
    Tel : ++82-42-280-2414

  • E-mail: shlee@dju.kr