| abstract |
Provided is a novel cyanoborate compound that can be suitably used as an electrolyte capable of maintaining a high capacity and a stable capacity over a long period of time in an electricity storage device. A cyanoborate compound represented by (1). (M m + represents a proton, a 1 to 3 valent cation, Y represents H, halogen, a hydrocarbon group having a main chain optionally having halogen, a C1-10 hydrocarbon group, a cyano group, -C (O) R. 14 , —S (O) 1 R 14 , —Z (R 14 ) 2, or —XR 14 , R 14 represents H, halogen, or an organic substituent having a main chain of C1 to 10; Z is N or P X represents O or S, l represents 1 to 2, m represents 1 to 3, and n represents an integer of 0 to 10.) [Selection] Figure 1 |