N/B codoped porous carbon electrode and electrolyte derived from amino acid based deep eutectic solvent for high capacitive performance

•Amino acid based DES was used as carbon precursor and electrolyte simultaneously.•The obtained N/B co-doped porous carbon possesses high N (11.51 at%) and B (7.01 at%) contents.•The optimized material exhibits excellent capacitive performances in amino acid based DES electrolyte. In this work, N/B...

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