Recent extensive studies revealed t

Recent extensive studies revealed the progressiveness of carbon materials in energy conversion and storage devices because of their significant advantages, including high conductivity, large specific surface area, light weight, and easy-to-control pore structure. For instance, Ketjen Black,[7] super P,[8] carbon nanotubes (CNT),[9-12] graphene,[13] have been successfully introduced into CO2 batteries to increase discharge capacity and extend cycle-life. Besides, doping heteroatoms (such as N and S) into the carbon framework can lead to uneven charge distribution and enforce the nearby carbon atoms positively charged, which is conducive to CO2 conversion[14-15]. Through heteroatom-doping, the overpotential of Li-CO2 battery is obviously reduced, and cycling performance is increased from 30 cycles using graphene to 200 cycles using B,N co-doping grapheme cathode[16]. However, most of carbon materials available on the market do not easily find applications due to their complicated production methods and relatively high cost. In particular, certain carbonaceous materials, derived from economical, green, and abundant regenerated biomass precursors, have been recently utilized as electrode materials. Biomass resources-derived carbon materials are considered as one of the most promising candidates, as they are economic, green, and easy to promote.