Original Article
  • 리튬이온전지 양극용 프러시안블루계 소재 동향

  • Hyunjoon Yoo*, Sang Bok Lee**, Il-Kwon Oh*†

  • * National Creative Research Initiative for Functionally Antagonistic Nano-Engineering, Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Yuseong-gu, Daejeon, Republic of Korea
    ** Department of Chemistry and Biochemistry, Maryland NanoCenter, Institute for Research in Electronics and Applied Physics, Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA

  • Prussian Blue Cathodes for Lithium-Ion Batteries: A Review

  • 유현준* · 이상복** · 오일권*†

  • 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

Prussian blue (PB) and Prussian blue analogues (PBAs) are being revisited as low-cost cathode candidates for lithium-ion batteries (LIBs), owing to their three-dimensional open-framework structures that facilitate favorable ion-diffusion pathways and their compositional tunability using relatively abundant elements such as Fe and Mn. In aqueous electrolytes, their kinetics and power capability can be relatively favorable due to fast ion transport and reduced desolvation barriers, whereas in non-aqueous electrolytes water content and defects, low electronic conductivity, and interfacial reactions often increase polarization and accelerate degradation. This review summarizes Li storage behavior and voltage characteristics of PB based cathodes and compares practical strategies such as defect and water control, compositing, and CEI design. We also discuss remaining challenges from electrolyte selection and electrode engineering perspectives to achieve both high power and stable cycling.


프러시안블루(Prussian blue, PB) 및 프러시안블루 유사체(PBA)는 3차원 개방형 골격 구조를 기반으로 이온 확산 경로가 유리하고, Fe/Mn 등 비교적 풍부한 원소 조합으로 설계가 가능해 저가형 리튬이온전지 양극 후보로 다시 논의되고 있다. 수계 전해질에서는 빠른 이온 이동과 낮은 탈용매화 장벽으로 비교적 고출력/가역 구동이 용이하지만, 유기 전해질에서는 수분과 결함, 낮은 전자전도도, 계면 반응으로 인해 분극과 열화가 커지는 한계가 있다. 본 리뷰는 PB계 양극의 리튬 저장 반응과 전압 특성을 정리하고, 결함과 수분 제어, 복합화, CEI 설계가 성능에 미치는 영향을 비교한다. 또한 출력과 안정성을 함께 확보하기 위해 필요한 전해질 선택과 전극 설계 관점의 과제를 논의한다.


Keywords: 프러시안블루(Prussian blue), 프러시안블루 유사체(Prussian blue analogue), 리튬이온배터리(Lithium-ion battery), 양극(Cathode), 양극 전해질 계면(Cathode electrolyte interphase)

This Article

Correspondence to

  • Il-Kwon Oh

  • * National Creative Research Initiative for Functionally Antagonistic Nano-Engineering, Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Yuseong-gu, Daejeon, Republic of Korea

  • E-mail: ikoh@kaist.ac.kr