Semi-solid electrolyte, semi-solid electrolyte, semi-solid electrolyte layer and secondary battery

摘要

Elution of the electrode current collector is suppressed. A mixed solvent comprising a semi-solid electrolyte solvent and an electrolyte salt, and a first additive, wherein the anion of the first additive is BF 4- or PF 6- , and the cation of the first additive is 100 or more semi-solid electrolytes, semi-solid electrolytes, semi-solid electrolyte layers, and secondary batteries. Preferably, the amount of the first additive added to the mixed solvent is 1 wt% to 20 wt%, and the first additive is NBu 4 PF 6 A semi-solid electrolyte, a semi-solid electrolyte, a semi-solid electrolyte layer, and a secondary battery. Thereby, the elution of an electrode current collector can be suppressed.