▎ 摘　　要

NOVELTY - Semi-solid lithium ion battery comprises anode, cathode, diaphragm and electrolyte; the active material of the anode is 2,3,5,6-tetrafluoro-7,7',8,8'-tetracyanodimethyl-p-benzoquinone, the electrolyte is solid-liquid mixed electrolyte. The preparation of solid-liquid mixed electrolyte comprises (1) mixing polyethylene oxide, lithium salt and nano-scale oxide particles in solvent to form white sol, and drying the white sol to obtain solid electrolyte membrane; (2) dissolving lithium salt in ionic liquid to obtain ionic electrolyte; (3) dropping the ionic electrolyte obtained in step (2) onto the solid electrolyte membrane obtained in step (1) to obtain the solid-liquid mixed electrolyte. USE - The battery is useful for small mobile devices e.g. mobile phone and computer. ADVANTAGE - The battery: is composed of a solid-liquid mixed electrolyte based on PEO and F4TCNQ organic high-voltage material; can guarantees higher charge-discharge specific capacity in 24V voltage range, and actively inhibits dissolution of F4TCNQ in electrochemical process by introduced PEO-based solid electrolyte; and has greatly improved electrochemical performance, good cycle performance, and higher specific capacity.