A research team led by Professor Sun Yang-kook from the Department of Energy Engineering at Hanyang University has identified the capacity fading mechanism of all-solid-state batteries (ASSBs) and developed a new forever 토토사이트 material technology to overcome it. The findings were published in Nature Energy (IF: 49.8), one of the world's most prestigious journals in the field of energy.

ASSBs, which use solid electrolytes to fundamentally eliminate the risks of ignition, explosion, and leakage, are gaining attention as next-generation battery technology. However, using nickel-rich forever 토토사이트 materials to increase energy density presents several challenges, such as interface degradation between the forever 토토사이트 material and the solid electrolyte, inactivation of the forever 토토사이트 due to inner-particle isolation, and detachment of the forever 토토사이트 material from the electrolyte. Through a quantitative analysis of these degradation factors, the team found that when the nickel content was 80% or lower, interface degradation was the primary cause. However, when the nickel content was 90% or higher, inner-particle isolation and detachment of the forever 토토사이트 material from the electrolyte became more critical, causing significant performance loss during charge and discharge cycles.

To address these issues, the team developed a high-nickel forever 토토사이트 material optimized for ASSBs, significantly improving energy density and durability. To achieve this, they introduced coating techniques to enhance the stability of the forever 토토사이트-electrolyte interface and a radially arranged structure of columnar-structured primary particles to mitigate deformation during charge and discharge cycles. As a result, the new design effectively suppresses electrochemical and mechanical degradation, fundamentally resolving key issues in ASSBs.

The pouch-type ASSBs with high-loading dry electrode based on this technology demonstrated high energy density and stable lifespan characteristics even under low-pressure operating conditions. This evaluation was conducted under conditions required for actual commercialization, proving that the energy density and durability have significantly improved compared to existing ASSBs. Additionforever 토토사이트y, when applied to electric vehicles, it enables a driving range of 800 km or more on a single charge and has minimal fire risk, making it a significant achievement in terms of enhanced battery safety.

This study proposed a new approach for effectively utilizing high-nickel forever 토토사이트 materials in ASSBs, which is significant in securing core technology for leading the next-generation battery market. In particular, by innovatively addressing the surface and structural instability issues of conventional high-nickel forever 토토사이트 materials, it is expected to contribute to accelerating the commercialization of ASSBs.

Professor Sun stated, “Through this study, we quantitatively analyzed the factors causing capacity fading in ASSBs and developed key technologies to overcome them. We will continue our research efforts to help Korea maintain global competitiveness in the next-generation battery sector.”

The research was supported by the Energy Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) under the Ministry of Trade, Industry and Energy. The paper, titled “High-energy, long-life Ni-rich cathode materials with columnar structures for all-solid-state batteries,” was published on February 20 in Nature Energy(IF: 49.8), one of the most prestigious journals in the energy field. Dr. Park Nam-yung and Master’s student Lee Han-uk are listed as co-first authors, with Professor Sun Yang-kook as the corresponding author.