Abstract
Lithium-ion batteries are nowadays a mature technology for the energy storage. However, some safety problems have beenidentified during the operation in high power applications such as fire incident in electric vehicles. The most promisingsolution to improve the safety of lithium-ion batteries is replacing current organic liquid based electrolyte with solidelectrolyte. In this context, new solid electrolytes having chemical and electrochemical stability with high ionic conductivityneeds to be discovered. Therefore, in the present study, a new LGPS-type structure domain is highlighted for the Li-B-P-Ssystem. The ionic conductivity of prepared solid electrolytes in the Li-B-P-S system has been achieved upto 10$^{-4}$ S/cm, andhigher stability against lithium metal as compared to Li$_{10}$GeP$_2$S$_{12}$. These solid electrolytes also show better electrochemical characteristics in all solid-state batteries.