Examining 'Jeongoche Battery' at the Nanoscale Level

[Asia Economy Reporter Junho Hwang] Domestic researchers have developed a technology to analyze the compositional distribution of battery electrodes at the nanoscale. As major domestic companies embark on developing all-solid-state batteries for electric vehicles, this technology is expected to serve as a crucial tool for the development of all-solid-state batteries.

KAIST announced on the 19th that a research team led by Professor Seungbeom Hong of the Department of Materials Science and Engineering has developed an imaging technique to identify the compositional distribution of battery electrodes using atomic force microscopy (AFM).

The research team successfully observed composite electrodes with dispersed lithium-ion conductors by utilizing various functions of atomic force microscopy, such as electrochemical displacement microscopy and lateral force microscopy. By analyzing the correlation between nanoscale ion reactivity intensity distribution and friction force intensity distribution, they identified the impact of binder composition ratios on ion reactivity.

Schematic Diagram of Atomic Force Microscopy Analysis Technology Utilizing Various Functions

The research team expects this technology to serve as a key tool for developing all-solid-state batteries using solid electrolytes in the future. In conventional lithium-ion batteries, the electrolyte is liquid, posing risks of fire or explosion. Accordingly, major domestic companies are developing all-solid-state batteries for next-generation electric vehicles.

Professor Seungbeom Hong stated, "The analysis technique developed using atomic force microscopy is advantageous for quantitatively understanding the role each component in composite materials plays in the final properties of the material. It can suggest design directions for next-generation all-solid-state batteries from various perspectives and lay the foundation for innovation in the manufacturing processes of other electrochemical materials."

The research results were published in the international journal 'ACS Applied Energy Materials.'

Dr. Kim Hong-jun (left) and Professor Hong Seung-beom

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