| abstract |
Disclosed is a composition that retains a solid electrolyte while maintaining ionic conductivity and has good processability. A lithium ion conductive solid electrolyte comprising at least one element selected from phosphorus, silicon, germanium, and boron, lithium and sulfur, and R 1 —O—C (═O) —O—R. 2 (wherein R 1 and R 2 are each a group having 2 or more carbon atoms), R 3 —O—R 4 —O—R 5 (wherein R 3 , R 5 is a group having at least 2 carbon atoms, respectively, R 4 is a group of one or more carbon atoms.) ether compound represented by, in R 6 -CN (wherein, R 6 is 2 or more groups having a carbon number And one or more kinds of compounds selected from nitrile compounds represented by the formula: [Selection] Figure 1 |