The scientific research team at Ulsan University of Science and Technology (UNIST) in South Korea has developed a new type of organic coating material that can extend the service life of all solid-state batteries. This organic coated sulfide based material can achieve stable anode interface in all solid-state batteries.
Sulfide based solid electrolytes have low mechanical deformation and low weight density, making them key materials for commercialization of all solid-state batteries. Due to the influence of external heat, secondary batteries may experience volume changes during repeated charging and discharging processes, which can easily lead to secondary battery rupture. To extend the lifespan of all solid-state batteries, the research team applied organic electrolyte additives as coating materials to the batteries, using difluorobis (oxalate) phosphate ester as an organic additive for the liquid electrolyte in lithium-ion batteries, slowing down the oxidation rate of secondary batteries, while also improving capacity ratio and stability.
Researchers stated that this study provides the possibility and scalability to explore the application of organic coating materials in the field of all solid-state batteries.
