▎ 摘　　要

NOVELTY - A graphite alkene/prussian blue complex composite aerogel comprises three-dimensional network structure by graphene sheet layers, where prussian blue complex particle is in nanolevel which is attached to graphite layer. USE - Graphite alkene/prussian blue complex composite aerogel for electrochromic device (claimed). ADVANTAGE - The aerogel has large specific surface area, low density, and excellent conductivity. It has excellent hydrogen storage performance, hydrogen peroxide catalytic reduction performance and electrochromic performance. The method has simple operation and low cost, and is suitable for industrial production in large scale. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of the graphite alkene/prussian blue complex composite aerogel which comprises adding metal cyanide in graphene oxide suspension and dispersing to obtain suspension A; adding metal salt in aqueous solution containing reducing agent to obtain solution B; and ultrasonically and uniformly mixing suspension A and solution B, standing to obtain composite hydrogel, drying to obtain composite aerogel. Metal salt is iron ion (Fe3+, Fe2+), cobalt ion (Co2+), copper ion (Cu2+), nickel ion (Ni2+), zinc ion (Zn2+), manganese ion (Mn2+), gallium ion (Ga2+), iridium ion (Ir3+), or cadmium ion (Cd2+). Soluble metal salt is sulfate, nitrate, phosphate or chloride. The reducing agent is sodium borohydride, urea, sodium sulfide, hydroiodic acid, vitamin C, sodium bisulfite or amino acid.