氮掺杂多孔 MOF 衍生碳电极的构筑及其电化学性能

doi:10.12066/j.issn.1007-2861.2020

Abstract

Abstract:

The N-GQDs@cZIF-8 supercapacitor has been fabricated following a two-step process through combining N-doped graphene quantum dots (N-GQDs) with metal-organic framework-derived carbon material (cZIF-8). The N-GQDs@cZIF-8 electrode has a high specific capacitance of 246.6 F · g^-1 at a current density of 0.5 A · g^-1 in 1 mol/L H₂SO₄ electrolyte and has excellent cycle stability with 83.7% capacity retention over 8 000 cycles. At the same time, the N-GQDs@cZIF-8 supercapacitor achieves an excellent energy density of about 8.2 W · h · kg^-1 at a power density of 104.5 W · kg^-1. The outstanding electrochemical performance of the device owes much to its 3D structure with high specific surface area and high nitrogen doping level (10.13%) with high pseudo capacitive activity, which makes this electrode have potential application in the field of supercapacitors and lithium-ion batteries.

Key words: metal organic frameworks (MOF)-derived carbon material, N-doped graphene quantum dots (N-GQDs), supercapacitor

CLC Number:

TQ316.3

Xiang LIU, Ling CAO, Weiwei YAO, Zhen LI, Minghong WU. Fabrication and electrochemical properties of nitrogen doped MOF-derived carbon electrodes[J]. Journal of Shanghai University（Natural Science Edition）, 2020, 26(1): 153-162.

Figures/Tables 8

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References 15

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Fabrication and electrochemical properties of nitrogen doped MOF-derived carbon electrodes

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