Forthcoming High Performance All-Solid-State Pouch Cell

All-solid-state batteries (SSB) (Generation 4) emerge as a promising candidate to exceed the performance of conventional lithium ion batteries (LIB) due to their improved energy density, durability and safety. Solid hybrid electrolytes (SHE) that combine the advantages of solid polymer electrolytes (SPE) and inorganic ceramic electrolytes (ICE) present acceptable ionic conductivity, high mechanical strength, and favorable interfacial contact with electrodes, which greatly improve the electrochemical performance of all-solid-state batteries compared to single SPE and ICE. Generation 4 pouch cell has been prepared using a SHE composed of LLZO particles and PEO/PVDF–HFP polymer matrix which shows a significantly improved ionic conductivity up to 2.7× 10⁻⁴ S cm⁻¹, which is favorable for fast ionic transport. As a result, this SSB pouch cell exhibits a capacity of 1 Ah operating well at rates of 0.2 C at 60°C over a cycle lifespan up to 100 cycles and excellent safety attributed to the improved electrochemical properties, thermal and mechanical stability of the SHE. These promising results may pave the way for industrial development of advanced Generation 4 of SSB towards practical application.