▎ 摘　　要

NOVELTY - Electrolyte comprises a first electrolyte salt and a non-aqueous organic solvent, where the first electrolyte salt comprises sodium sulfamate and sodium bis-fluorosulfonimide. USE - The electrolyte is useful for sodium ion battery. ADVANTAGE - The electrolyte inhibits the anode of the transition metal element, prevents the decomposition of the passivation layer, and improves the high voltage stability of the battery, improves the low temperature discharge of battery, high temperature circulation and high temperature storage performance, and inhibits the gas production of battery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a sodium ion battery comprising an anode, a cathode and the electrolyte.