Biomass activated carbon coated germanate composite material as well as preparation method and application thereof

The invention provides a biomass activated carbon coated germanate composite material as well as a preparation method and application thereof, and belongs to the field of electrochemistry. The material is prepared by the following steps: putting lotus seedpods and alkali liquor into a reaction kettle for reaction to obtain a raw material subjected to hydrothermal treatment; calcining the raw materials subjected to hydro-thermal treatment, and performing grinding and ultrasonic treatment to obtain a biomass activated carbon material; and finally, preparing the biomass activated carbon material into a biomass activated carbon solution, adding GeO2 for dissolving, then adding acetate for mixing, and putting the obtained mixed solution into a high-pressure reaction kettle for reaction to obtain the biomass activated carbon coated germanate composite material. The invention also provides the biomass activated carbon coated germanate composite material obtained by the preparation method. The invention also provides