Rice husk-based graphene-like porous carbon material with high bulk ratio capacity and preparation method thereof

The invention discloses a rice husk-based graphene-like porous carbon material with high bulk ratio capacity and a preparation method thereof, comprising the following steps: (1) immersing the rice husk in a nickel salt solution with a mass ratio of nickel element to rice husk being 0.03 to 0.06: 1, stirring, and drying, to obtain a rice husk-nickel salt mixture; (2) carbonizing the rice husk-nickel salt mixture at a temperature of 700 DEG Cto obtain RHNi-700, then soaking with acid solution to remove the nickel salt particles in the RHNi-700, washing, drying, and then obtaining RHNi-700A; (3)dissolving the RHNi-700A and alkali in water with mass ratio of the RHNi-700A to the alkali being 1: to (3to -5), mixing uniformly, drying, heating and activating the dried mixture under an inert gasatmosphere, and then obtaining the rice husk-based graphene-like porous carbon material. The preparation method provided by the invention has the advantages of simple process, various raw materials and low cost, and the obtai