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Polymer protective coatings at the cathode interface

A major challenge in solid-state batteries is electrochemical degradation at the electrode-electrolyte interface, especially when using high-energy cathode materials such as LiNi1−x−yCoxMnyO2 (NCM) or silicon anodes, along with sulfide-based electrolytes such as Li6PS5Cl. The unstable interface leads to capacity fading during cycling. To address this, research is focusing on three parts: (a) to create reliable coating methods to obtain uniform coatings on NCM and silicon particles; (b) to explore novel polymer coatings to improve the performance of NCM and silicon in solid-state batteries, aiming to enhance cycling stability; (c) to examine the role of polymer coatings in solid-state batteries, providing direction for future polymer coating designs.