Heteroatoms co-doped porous carbons from amino acid based polybenzoxazine for superior CO2 adsorption and electrochemical performances

•A new strategy to synthesis bio-based polybenzoxazine was proposed by choosing amino acid as amine source.•Thermal properties of the amino acid-containing bio-based benzoxazine have highly been enhanced.•The obtained carbon materials from amino acid-containing bio-based benzoxazines possessed CO2 capacity of 6.78 mmol/g and specific capacitance of 310 F/g.