Novel film improves life of anode-free solid-state battery by 7 times

Researchers at the Korea Research Institute of Chemical Technology (KRICT) have developed a novel molybdenum disulfide (MoS2) thin film coating that significantly enhances the lifespan and stability of anode-free all-solid-state batteries (AFASSBs). By applying MoS2 nanosheets onto stainless steel current collectors via metal-organic chemical vapor deposition (MOCVD), the team created a cost-effective, scalable alternative to expensive noble metal coatings. This MoS2 layer acts as a sacrificial buffer that reacts with lithium during battery cycling, forming a stable interfacial layer of molybdenum metal and lithium sulfide (Li2S). This dynamic interface improves lithium affinity, prevents dendrite formation, and boosts capacity retention by seven times, enabling stable operation for over 300 hours and tripling battery runtime. The innovation addresses key challenges in AFASSBs, which eliminate the anode to reduce cell volume and increase energy density but suffer from interfacial instability and dendrite growth