Electrodes & Interfaces

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    Electrodes & Interfaces

  • Achieving (electro)chemically stable interfaces
    고체전해질과 활물질 계면의 전기화학적 안정성 확보
  • Achieving intimate ionic contacts
    전극의 고체 입자간 밀접한 면접촉을 통한 이온 전달 경로 확보
  • Enabling the adaptation of next-generation cathode materials to all-solid-state batteries
    전고체전지용 차세대 양극소재 개발 및 적용
  • Surface engineering of active materials
    1 J. Power Sources 2015, 274, 1254
  • 1 Chem. Mater. 2018, 30, 8190
  • Inorganic SE materials have narrow intrinsic electrochemical windows, which provokes the need of the passivation of SEs for the reversible operation of all-solid-state batteries. In particular, the adoption of conventional LixMO2 (M = Ni, Co, Mn, Al) cathode materials to all-solid-state Li-ion or Li batteries (ASLBs) suffers from huge interfacial resistances. In-depth understanding on the evolution at the electrode−SE interfaces is required and imperative for the practical development of high performance ASLBs.

  • Ni-rich layered oxide cathode materials
    1 Adv. Energy Mater. 2020, 10, 1903360
  • 1 Han et al. 2020. (Submitted)
  • Ni-rich layered oxide cathode materials (LiMO2, M = Ni, Co, Mn, Al) were susceptible to severe disintergration of the secondary particles even at the 

    initial charge and discharge due to anisotropic volumetric strains, which led to poor electrochemical performance of low ICE and degradation of cycle 

    retention. In this regard, recently emerging research directions for advanced types of cathodes and SEs are highly pursued.

  • Solution processable solid electrolytes
    1 Adv. Mater. 2016, 28, 1874
  • 1 Angew. Chem. Int. Ed. 2016, 55, 9634
  • 1 Nano Lett. 2017, 17, 3013
  • 1 Nano Lett. 2020, 20, 4337
  • Our group develops solution processable SEs for surface coating of active materials in ASBs. The homogeneous SE solutions formed by solution process 

    could be used for direct SE coatings on active materials or the infiltration of slurry-cast porous electrodes used in conventional LIBs. Solution process 

    offers the intimate ionic contacts between active materials and SE, thereby enhanced electrochemical performance of ASBs. Furthermore, solution

    process enables the scalable process of cell fabrication for ASBs.