Hanyang University announced on the 28th that a research team led by Professor Seon Yang-guk from the Department of Energy Engineering (photo) has identified the performance degradation mechanism of All-Solid-State Batteries and developed a new cathode material technology to overcome it.
All-Solid-State Batteries are next-generation battery technology that uses solid electrolytes to fundamentally eliminate the risk of fire and explosion. The research team quantitatively analyzed the factors causing performance degradation due to increased nickel content and found that when the nickel content is below 80%, interfacial damage is the main cause. However, at 90% or higher, microcracks and reduced electrolyte contact become more serious issues, leading to rapid performance degradation during charge-discharge cycles.
To address this, the research team introduced methods such as △ strengthening cathode-electrolyte interface stability through coating and △ applying a radial arrangement structure of rod-shaped primary particles to overcome deformation occurring during charge-discharge. The results of this study were published in ‘Nature Energy,’ the world’s most prestigious journal in the energy field. The research is significant in proposing a new approach to effectively use high-nickel cathode materials in all-solid-state batteries. In particular, by solving the surface and structural instability problems of existing high-nickel cathode materials, it is expected to contribute to accelerating the commercialization of all-solid-state batteries.
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