| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Research on Electrochemical Properties of Ni-MOF/GNS@Ni/Mn-LDH Electrode Materials |
| MA Yingxia1,2,*, LI Jing1,2, MENG Tianli1,2, CHANG Shifan1,2, LI Wenjing1,2
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1 State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China 2 School of Materials Science & Engineering, Lanzhou University of Technology, Lanzhou 730050, China |
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Abstract Metal-organic frameworks (MOFs) have attracted much attention as electrode materials due to the structural controllability, large specific surface area, and high porosity. However, MOFs have intrinsically low electrical conductivity, tendency to agglomerate, and structural instability, which limit their application as electrode materials. Graphite nanosheets (GNS) as one of carbon materials have the advantages of good conductivity and stable structure. By in situ growth of nickel MOFs (Ni-MOFs) on GNS, the electrical conductivity, dispersibility and structural stability of Ni-MOFs were improved. Nevertheless, the specific capacity and power density are relatively low. Layered double hydroxides (LDH) have good oxidation-reduction activity and anion exchange performance, which could provide high specific capacities and power densities. Hence, in this work, Ni/Mn-LDH was introduced into Ni-MOFs/GNS to construct a series of Ni-MOF/GNS@Ni/Mn-LDH nanohybrid materials using solvothermal method by adjusting the molar ratio of Ni(NO3)2·6H2O to Mn(NO3)2·4H2O, reaction temperature, and time length. The results showed that the Ni-MOF/GNS@Ni/Mn-LDH obtained at the optimal conditions exhibited a specific capacity of 1 102.0 C/g at the current density of 1.0 A/g. The asymmetric supercapacitors assembled by the aforementioned Ni-MOF/GNS@Ni/Mn-LDH and activated carbon had a power density of 800.0 kW/kg and an energy density of 15.3 Wh/kg.
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Published: 25 November 2025
Online: 2025-11-14
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