抄録
Tetraethylammonium tetrafluoroborate (TEABF4), which is commonly used as the electrolyte for electric double-layer capacitors (EDLCs), has poor solubility in chain carbonates such as dimethyl, ethyl methyl, and diethyl carbonates (DMC, EMC, and DEC, respectively). Triethylmethoxymethylammonium bis(oxalato)borate (TEMMABOB) is a novel quaternary ammonium salt based on a halogen-free chelatoborate anion. TEMMABOB has good solubility in the chain carbonates as well as in propylene carbonate (PC). Electric conductivities of PC-chain carbonate binary solutions of TEMMABOB were slightly lower than that of a PC single solution of TEABF4. However, double-layer capacitances for three-electrode measurement cells using TEMMABOB were comparable to those obtained for TEABF4.
