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A Ni-doped Mn-MOF decorated on Ni-foam as an electrode for high-performance supercapacitors

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Abstract

In this work, a one-step hydrothermal method is used to synthesize Ni-doped Mn-based organic framework material (Ni-doped Mn-MOF) on NF with 1,4,5,8-naphthalenetetracarboxylic acid (NTC) as ligand. Ni doping results in a more unique structure combining nanoblocks and nanosheets, which facilitates the contact between active sites and electrolyte ions and enhances electrochemical performance. Acting as the electrode material of supercapacitors, Ni-doped Mn-MOF shows a specific capacity of 779.6 C g−1 and a specific capacitance of 1676.6 F g−1 at 1 A g−1. Besides, the retention rate reaches as high as 75.9% after 10,000 cycles at 10 A g−1. Meanwhile, the as-prepared Ni-doped Mn-MOF//AC device shows a high specific capacitance of 361 C g−1 (225.6 F g−1) at 8 A g−1. By the way, the device exhibits an energy density of 74.75 Wh kg−1 at a power density of 7985.16 W kg−1 with 70.6% specific capacitance retention after 10,000 consecutive charge–discharge cycles at 10 A g−1. The ease of composite manufacturing demonstrates that Ni-doped Mn-MOF has potential applications as electrode materials for supercapacitor.

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Funding

This work was supported by the National Natural Science Foundation of China (No. 22004002), the University Natural Science Research Project of Anhui Province (No. KJ2018A0107), and the Open Fund of Anhui Laboratory of Functional Coordinated Complexes for Materials Chemistry and Application (LFCCMCA-08, LFCCMCA-10).

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Correspondence to Rongmei Liu or Xiandong Zhu.

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Liu, X., Zhang, X., Liu, R. et al. A Ni-doped Mn-MOF decorated on Ni-foam as an electrode for high-performance supercapacitors. J Nanopart Res 24, 23 (2022). https://doi.org/10.1007/s11051-022-05411-9

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  • DOI: https://doi.org/10.1007/s11051-022-05411-9

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