Kim Hyun-ji
Overview
Kim Hyun-ji (born March 15, 1980) is a South Korean materials engineer and professor in the Department of Materials Science and Engineering at KAIST. She has gained international fame for research on nanomaterial-based energy storage and conversion devices, particularly achieving innovative results in next-generation all-solid-state batteries and hydrogen production catalysts. In 2023, she published a paper as the sole corresponding author in the world-renowned journal Nature, elevating the status of Korean female scientists.
Main Content
Education and Early Career
Kim Hyun-ji graduated from the Department of Materials Science and Engineering at Seoul National University and earned a master's degree from the same graduate school. She subsequently obtained a Ph.D. from the Massachusetts Institute of Technology (MIT) in the United States and worked as a postdoctoral researcher at the California Institute of Technology (Caltech). In 2012, she was appointed as a professor in the Department of Materials Science and Engineering at KAIST.
Major Research Fields
1. All-Solid-State Batteries: She led research that replaces the liquid electrolyte of conventional lithium-ion batteries with a solid, dramatically improving safety and energy density. In particular, she developed a technology that enhances the ionic conductivity of sulfide-based solid electrolytes by more than tenfold.
2. Hydrogen Production Catalysts: She designed low-cost metal-based catalysts (nickel-iron composites) that can replace expensive platinum, achieving over 90% efficiency in water electrolysis.
3. Nanomaterial Synthesis: Using atomic layer deposition (ALD) technology, she developed large-area synthesis methods for two-dimensional nanomaterials (graphene, transition metal dichalcogenides).
Major Awards and Achievements
- 2020: 'Young Engineer Award' from the National Academy of Engineering of Korea
- 2022: 'Female Scientist and Engineer of the Year Award' (Ministry of Science and ICT)
- 2023: Published Nature paper 'Ultrahigh ionic conductivity in sulfide solid electrolytes'
- 2024: Selected as a 'Young Global Leader' by the World Economic Forum (WEF)
- 2025: Elected as a Fellow of the Materials Research Society (MRS)
Social Contributions
Kim Hyun-ji is actively involved in fostering female scientists and engineers. She founded the 'Women in Engineering Network' at KAIST and operates a science camp for middle and high school students called 'Dreaming Lab.' She also serves as an advisory committee member for the government's 'Carbon Neutral Technology Development Roadmap,' emphasizing the importance of technologies to address the climate crisis.
Latest Trends
As of 2024–2025, Kim Hyun-ji's research team is conducting joint research with Samsung SDI, LG Energy Solution, and others with the goal of commercializing all-solid-state batteries. In early 2025, they attracted attention by unveiling a prototype of an all-solid-state battery capable of over 1,000 charge-discharge cycles at room temperature. Additionally, she has begun research on discovering new materials using artificial intelligence (AI), developing a platform that predicts candidate solid electrolyte materials based on machine learning. Recently, she announced a technology that reduces the cost of green hydrogen production to below $3 per kilogram to revitalize the hydrogen economy.
Related Topics
- [[KAIST]]
- [[All-solid-state battery]]
- [[Hydrogen economy]]
- [[Female scientists and engineers]]
- [[Nanomaterials]]
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