MOF derived graphitic carbon nitride/oxygen vacancies-rich zinc oxide nanocomposites with enhanced supercapacitive performance


Supercapacitors with high power density and durability have shown enormous potential for smart electronics. Herein, a novel graphitic carbon nitride (g-C3N4) coated with oxygen vacancies-rich ZnO (OZCN) nanocomposites was prepared from zeolitic imidazolate framework precursor by direct thermal decomposition melamine in air. The as-prepared OZCN nanocomposites exhibited high capacitive performance (3,000 F g-1 at 3 A g-1) and excellent cycling stability due to the synergetic effect of g-C3N4 and oxygen vacancies-rich ZnO. Additionally, the assembled asymmetric supercapacitor displayed an energy density of 100.9 Wh kg-1, while the capacitance retention remained at 86.2% even after 1,000 cycles at 7 A g-1. This study is highlighting a new way for designing metal oxide electrode possessing excellent electronic properties for durable and low-cost energy storage devices.

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We appreciate the help of Prof. Guanyinsheng Qiu.


This study is funded by the National Natural Science Foundation of China (51661008 and 21766032), the Zhejiang Provincial Natural Science Foundation of China (LQ19F040005), Jiaxing Public Welfare Research Program (2018AY11007) and Jiaxing University SRT project (CD8517193136).

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Shen, J., Wang, P., Jiang, H. et al. MOF derived graphitic carbon nitride/oxygen vacancies-rich zinc oxide nanocomposites with enhanced supercapacitive performance. Ionics (2020).

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  • Energy storage
  • Supercapacitor
  • ZIF-8
  • Graphitic carbon nitride
  • Zinc oxide