Article
  • Lithium Manganese Oxides Cathodes Functionalized by Ionic Monomer Additive as a Surface Modifier for Lithium-ion Batteries

  • Min Ji Seong, So Young Park*, Tae-Hyun Kim**, Yeong Don Park*,† , and Taeeun Yim†

  • Advanced Batteries Laboratory, Department of Chemistry, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Korea
    *Organic Optoelectronics Laboratory, Department of Energy and Chemical Engineering, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Korea
    **Organic Material Synthesis Laboratory, Department of Chemistry, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Korea

  • 기능성 이온 단량체의 가교를 통하여 표면 개질된 고율 충전용 리튬 망간 산화물 양극 소재

  • 성민지 · 박소영* · 김태현** · 박영돈*,† · 임태은†

  • 인천대학교 화학과 이차전지연구실, *인천대학교 에너지화학공학과 유기광전자 연구실, **인천대학교 화학과 유기재료합성연구실

  • Reproduction, stored in a retrieval system, or transmitted in any form of any part of this publication is permitted only by written permission from the Polymer Society of Korea.

Abstract

In this study, 3-propyl-1-vinylimidazolium tetrafluoroborate (VPI BF4) as an ionic crosslinker is designed and synthesized to improve the high rate capability of lithium manganese oxide (LMO) cathode material. The synthesis of ionic crosslinker is confirmed by 1H nuclear magnectic resonance and 19F nuclear magnectic resonance spectroscopies. It is confirmed that the VPI BF4 is successfully crosslinked through Fourier-transform infrared spectroscopy. The use of VPI BF4 does not compromise with the electrochemical performance of the cell even at high temperature and enhances the rate capability. The analysis of electrodes after electrochemical evaluation proves that VPI BF4 contributes to the improvement of LMO interphase properties.


본 연구에서는 리튬이온전지 양극 소재로 각광받고 있는 lithium manganese oxide(LMO)의 고율 충/방전 특성을 개선하고자 3-propyl-1-vinylimidazolium tetrafluoroborate(VPI BF4)의 구조를 갖는 이온성 가교제를 설계하고 이를 LMO 양극 소재 표면에서 가교하여 표면 특성이 개선된 LMO 양극을 개발하였다. 이온성 가교제는 핵 자기 공명 분광법을 통하여 합성을 확인하였으며 LMO 양극 표면에서의 가교 반응 전후의 푸리에 변환 적외선 분광기 분석을 통해 LMO 양극 소재 표면의 개질이 성공적으로 진행되었음을 확인하였다. 그 결과 VPI BF4으로 개질된 LMO 양극 소재는 안정적인 전기화학적 수명 특성 및 개선된 고율 특성을 나타내었으며, 충/방전이 완료된 전극의 분석을 진행하여 VPI BF4가 계면 특성의 개선에 기여하고 있음을 확인하였다.


Keywords: lithium ion batteries, lithium manganese oxide, uniformity, crosslinking agent, electrochemical performance.

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2022; 46(1): 88-93

    Published online Jan 25, 2022

  • 10.7317/pk.2022.46.1.88
  • Received on Sep 23, 2021
  • Revised on Nov 12, 2021
  • Accepted on Nov 13, 2021

Correspondence to

  • Yeong Don Park*, and Taeeun Yim

  • Advanced Batteries Laboratory, Department of Chemistry, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Korea
    *Organic Optoelectronics Laboratory, Department of Energy and Chemical Engineering, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Korea

  • E-mail: ydpark@inu.ac.kr, yte0102@inu.ac.kr