Expansion graphite anode material for lithium capacitors impregnated with lithium expansion graphite

摘要

The present invention relates to a negative electrode material for lithium ion capacitors in which expanded graphite and expanded graphite are impregnated with lithium in a vacuum and further used as an aqueous polyacrylate binder. Specifically, the steps of expanding graphite, atomizing expanded graphite, Impregnating fine expanded graphite with lithium hydroxide and lithium cobalt oxide (Li ₆ CoO ₄ ) in a vacuum, dissolving the expanded graphite and polyacrylate, an aqueous binder, in distilled water as a solvent, solution Slurrying using a binder to form a sheet to form a negative electrode for a lithium-ion capacitor, and to expand the graphite and impregnated the lithium compound between the layers of the expanded graphite and doped the negative electrode material and manufacturing process To provide. Therefore, the lithium ion capacitor of the present invention is a negative electrode material for simultaneously satisfying the high power and long life characteristics of a supercapacitor and the high energy density characteristics of a lithium ion battery, using low-cost raw materials, doping of a simplified and uniformized lithium source, and an environmentally friendly aqueous binder. It is to invent and provide use.