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Boron and Nitrogen Co-Doped Porous Carbon with Ultrahigh Volumetric Performance for Zinc-Ion Hybrid Supercapacitors

SSRN, ISSN: 1556-5068
2024
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Article Description

It is a huge challenge for carbon materials to obtain high volumetric capacitance without sacrificing gravimetric capacitance for supercapacitors with limited space. Herein, B/N/O co-doped porous carbon materials were intended by one-step carbonization method using boric acid as the template and boron source and polyacrylamide as the carbon and nitrogen sources. Boric acid and polyacrylamide can be closely combined by hydrogen bond, so as to not only give full play to the role of boric acid template, but also to achieve high content of nitrogen and boron co doping. Benefiting from the high bulk density (about 1.51 g cm-3), suitable specific surface area (243.2 m2 g-1) and numerous B (7.55 at. %), N (14.38 at. %), O (11.89 at. %) functional groups, the prepared BNPC-700 electrode shows an ultrahigh volumetric specific capacitance of 546 F cm-3 at 0.5 A g-1, excellent rate characteristics and superior electrochemical performance. Furthermore, the combined BNPC-700 symmetric supercapacitor achieves a high volumetric energy density of 31.1 Wh L-1 in 1 M ZnSO4 aqueous electrolyte. More importantly, the assembled Zn//ZnSO4//BNPC-700 hybrid capacitor delivers a remarkable capacity of 210.8 mAh cm-3 and a high volumetric energy density of 147.74 Wh L-1.

Bibliographic Details

Tingting Song; Jiayi Chen; Weijian Chen; Xinyang Zhang; Xiaoliang Wu

Elsevier BV

Multidisciplinary; Heteroatom-doped porous carbon; Supercapacitors; Zinc ion hybrid capacitor; Polyacrylamide

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