Nitrogen doped layered porous carbon derived from peanut shell for high volumetric performance supercapacitors

Herein, the N doped layered porous carbons (NLPCs) were synthesized from biomass waste. The NLPCs present high compaction density, layered structures and moderate content of N, O elements. Owing to the synergistic effect of merits, the NLPC presents excellent volumetric performance when used as electrode for supercapacitor (SC), e.g. high volumetric capacitance of 317.3 F cm(-3) at 0.1 A g(-1), and high energy density of 10.9 Wh L-1. Moreover, the capacitance retention of NLPC4-based supercapacitor is 105.2% after 10,000 charge/discharge cycles. The results show the excellent application prospects of NLPC in high volumetric performance supercapacitors. This study also provides a universal method for the preparation of NLPC for SCs.

Automated summary

In this study, N-doped layered porous carbons (NLPCs) were synthesized from biomass waste. The NLPCs showed high volumetric capacitance and energy density when used as electrodes for supercapacitors. Furthermore, the capacitance retention of the NLPC4-based supercapacitor was over 100% after 10,000 charge/discharge cycles. These results demonstrate the promising application prospects of NLPCs in high volumetric performance supercapacitors.