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University of Ulsan (UOU)
Jung's Group
University of Ulsan (UOU)
All-Solid-State Batteries
All-solid-state battery (ASSB) technology will lead to major scientific breakthroughs in electric vehicles (EVs) by enabling the battery components to be safer than in the Li-ion battery using a liquid electrolyte. Therefore, replacing a liquid electrolyte with a solid-state electrolyte (SSE) and unraveling the fundamental mechanism of electrode-SSE are imperative in the engineering of ASSB, improving performance for making ASSB practicable in the actual car.
Electrochemical Electrode-Electrolyte Interface
All-solid-state Li batteries have the potential to significantly enhance the safety and performance of state-of-the-art Li-ion batteries. Although solid-state electrolytes (SSEs) (e.g., ceramics (garnet-type LLZO and NASICON-type LATP/LAGP), and argyrodite) with high Li+ conductivity have been achieved, the battery performance is still poor, which can be described to high internal resistance at the interfaces (a space charge region) between electrode and SSE. We are interested in inventing a novel protective layer and processing for inserting such an interlayer at the electrode-SSE interface. In addition, we seek to understand the mechanism underlying the principles of improvement at the interfaces.
Thin-film batteries & Microbatteries
In accordance with the fourth industrial revolution (4IR), thin-film all-solid-state batteries (TF-ASSBs) or microbatteries are being revived as the most promising energy source to power small electronic devices. Nevertheless, TF-ASSBs have not yet been realized for actual applications (e.g., wearable devices, low-power internet-of-things (IoT) devices, and army technology) required in our lives. We attribute the limitations to the low electrochemical performance of the battery components and thus focus on understanding the fundamental reaction principle and constructing desirable electrode & electrode-electrolyte interfaces by utilizing a protective layer.
