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대학/대학원
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연구/산학
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대학생활
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입학/취업
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커뮤니티
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대학소개
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개교 80주년
연구/산학
PKNU Research 1000
New Beginning, New Inspiration
Pukyong National University, the first university in Busan,always paves a new path through specialized and converged research to lead the era of the fourth indutrial revolution.
| Nam-Hyung Kim | Next-Generation All-Solid-State Battery Research | |||
| 작성자 | 대외홍보센터 | 작성일 | 2026-05-04 |
| 조회수 | 47 | ||
| Nam-Hyung Kim | Next-Generation All-Solid-State Battery Research | |||||
 |
대외홍보센터 |  |
2026-05-04 |  |
47 |
Extending Both Lifespan and Output of High-Nickel Cathodes for Next-Generation All-Solid-State Batteries
- Joint research achievement by Pukyong National University and the Korea Institute of Energy Research
- Published in <Energy Storage Materials>, a top 5% international journal in materials science
A new particle design technology that simultaneously improves both the lifespan and output performance of high-nickel cathodes for next-generation all-solid-state lithium-ion batteries is drawing attention.
A research team led by Nam-Hyung Kim, Professor of the Department of Materials System Engineering at Pukyong National University, and a team led by Hyeon-Yeon Cha, Senior Researcher at the Korea Institute of Energy Research, successfully secured both the lifespan and output performance of high-nickel cathodes for all-solid-state batteries through a “multi-scale structural design strategy” that simultaneously designs the nano- and micro-scale structures of particles.
Recently, research on next-generation all-solid-state batteries for realizing high-energy-density batteries, which are essential for electric vehicles and large-scale energy storage systems, has been actively advancing. However, limitations in stability and performance have remained a major challenge.
The research team focused on the issue of rapid performance degradation when applying NCM (lithium nickel cobalt manganese oxide, LiNi？.？Co？.₁Mn？.₁O) cathode materials to all-solid-state batteries.
The study found that while the same cathode material operates without issue in conventional liquid electrolyte environments, its capacity decreases by approximately 20% and reactions within the electrode and particles become uneven when applied to all-solid-state batteries using sulfide-based solid electrolytes.
Conventional polycrystalline high-nickel cathode particles in all-solid-state batteries were unable to achieve sufficient structural changes during the lithium insertion and extraction process in charge？discharge cycles, making it difficult to realize optimal capacity and causing non-uniform reactions, in which only some particles actively reacted. In particular, under the high pressure essential for all-solid-state batteries, limitations arose as particle cracking and uneven contact with the solid electrolyte created large amounts of “dead zones,” where reactions could not occur inside the electrode.
To solve this issue, the research team proposed a “multi-scale structural design strategy” that simultaneously controls both nano- and micro-scale structures. First, they synthesized high-nickel NCM with artificially introduced twin-boundary defects inside the cathode particles, securing internal pathways that allow faster lithium-ion transport.
In addition, instead of the conventional secondary particle structure, in which multiple primary particles are clustered together at the micro scale, the team introduced single-crystal high-nickel NCM, where the entire particle consists of a single crystal. This approach takes advantage of the fact that the single-crystal structure has almost no grain boundaries inside the particle, preventing microcracks even under high-pressure conditions and enabling the long-term maintenance of both particle shape and electrode structure.
When the research team evaluated high-nickel cathodes for all-solid-state batteries using this technology under actual all-solid-state battery conditions, the single-crystal NCM showed an initial discharge capacity of approximately 197 mAh/g and maintained more than 90% of its capacity even after 100 charge？discharge cycles. This demonstrates a lifespan comparable to that of conventional liquid electrolyte batteries.
Professor Nam-Hyung Kim stated, “This study is significant in that it presents a new cathode structure design paradigm optimized for all-solid-state battery environments. Such a multi-scale materials design strategy will serve as an important guideline for the future development of commercial cathodes for next-generation all-solid-state batteries.”
The research findings were published in the paper titled “Synergistic Nano-Micro Structuring Boosts High-Ni Cathode Performance for All-Solid-State Lithium-Ion Batteries” in <Energy Storage Materials>, an international journal ranked in the top 5% of the materials science field. <Pukyong Today>
