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Binary metal organic framework material applied to super capacitor and preparation method for binary metal organic framework material

A technology of supercapacitors and binary metals, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, hybrid capacitor collectors, etc., can solve the problems of poor specific capacity cycle stability and low specific capacity cycle stability, etc. Achieve the effect of large specific surface area

Inactive Publication Date: 2015-10-21
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
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Problems solved by technology

Therefore, MOFs are widely used as adsorption materials, catalytic materials, magnetic materials, optical materials and energy storage materials, especially the application of MOFs in the field of energy storage has attracted the attention of many scholars, and in recent years more and more MOFs materials are applied to lithium-ion batteries and supercapacitor electrode materials (Journal of Solid State Chemistry 223 (2015) 109–121), we found that the MOFs directly used as supercapacitor electrode materials are mainly Ni-based MOFs and Co-based MOFs, and Ni-based MOFs show high specific capacity and poor cycle stability (Chinese Chemical Letters 25 (2014) 957–961), Co-based MOFs show low specific capacity and good cycle stability (Microporous and Mesoporous Materials 153( 2012) 163–165), it is precisely because of the defects of one kind or another in single metal organic framework materials that limit its application

Method used

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  • Binary metal organic framework material applied to super capacitor and preparation method for binary metal organic framework material
  • Binary metal organic framework material applied to super capacitor and preparation method for binary metal organic framework material
  • Binary metal organic framework material applied to super capacitor and preparation method for binary metal organic framework material

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Embodiment 1

[0025] A stable binary metal-organic framework electrode material, which is composed of binary metal ions and organic ligands through self-assembly, the binary metal is Co-Ni, and the organic ligand is trimesic acid, The molar ratio of Co: Ni: trimesic acid is 2:8:5.

[0026] The preparation method of the above-mentioned binary metal-organic framework electrode material, the specific steps are as follows: Weigh 0.006mol Co(NO 3 ) 2 ·6H 2 O, 0.004mol Ni(NO 3 ) 2 ·6H 2 O and 0.005mol trimesic acid, with 65mL mixed solvent (N, N-dimethylformamide (DMF): ethanol (C 2 h 5 OH): distilled water (H 2 (0)=1:1:1) dissolved, stirred at room temperature with a magnetic stirrer until evenly mixed; poured the mixed solution into a polytetrafluoroethylene-lined hydrothermal reaction kettle, and kept it at a constant temperature of 100°C for 30h , the reaction system was slowly cooled to room temperature, and the resulting mixed solution was poured out from the reactor for suction fil...

Embodiment 2

[0029] A binary metal-organic framework material applied to supercapacitors, which is composed of two metal ions and organic ligands through self-assembly, the two metal ions are Co-Ni, and the organic ligand is trimesene Formic acid, the molar ratio of Co:Ni:trimesic acid is 6:4:5.

[0030] The preparation method of the above-mentioned binary metal-organic framework material, the specific steps are as follows: Weigh 0.006mol Co(NO 3 ) 2 ·6H 2 O, 0.004mol Ni(NO 3 ) 2 ·6H 2 O and 0.005mol trimesic acid, with 65mL mixed solvent (N, N-dimethylformamide (DMF): ethanol (C 2 h 5 OH): distilled water (H 2 (2)=1:1:1) dissolves, stirs to mix with magnetic stirrer at room temperature; The solution that mixes is poured in the hydrothermal reactor of polytetrafluoroethylene liner, after putting into baking oven, with 5 ℃min -1 The heating rate was increased to 85°C and kept at a constant temperature for 20h, the reaction system was slowly cooled to room temperature, the resulting...

Embodiment 3

[0033] A stable binary metal-organic framework electrode material, which is composed of binary metal ions and organic ligands through self-assembly, the binary metal is Co-Ni, and the organic ligand is trimesic acid, The molar ratio of Co: Ni: trimesic acid is 8:2:5.

[0034] The preparation method of the above-mentioned binary metal-organic framework electrode material, the specific steps are as follows: Weigh 0.006mol Co(NO 3 ) 2 ·6H 2 O, 0.004mol Ni(NO 3 ) 2 ·6H 2 O and 0.005mol trimesic acid, with 65mL mixed solvent (N, N-dimethylformamide (DMF): ethanol (C 2 h 5 OH): distilled water (H 2 (0)=1:1:1) dissolved, stirred at room temperature with a magnetic stirrer until uniformly mixed; poured the mixed solution into a polytetrafluoroethylene-lined hydrothermal reaction kettle, and kept it at a constant temperature of 120°C for 40h , the reaction system was slowly cooled to room temperature, and the resulting mixed solution was poured out from the reactor for suction ...

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Abstract

The invention belongs to the field of super capacitors and particularly relates to a binary metal organic framework material applied to a super capacitor and a preparation method for the binary metal organic framework material. The binary metal organic framework material is formed of two types of metal ions and an organic ligand using a solvothermal method in a self assembly coordination manner. The two types of metal ions are Co-Ni, Co-Fe, Co-Mn, Ni-Mn or Ni-Cu. The organic ligand is trimesic acid, terephthalic acid, 2,6-naphthalene acid, 4,4'-biphenyl diacid or 2-methylimidazole. The binary metal organic framework material is advantaged by having multiple holes, large specific surface area and an adjustable structure, and being varied in structure. The cooperative effect between the two types of metal ions in the binary metal organic framework material (MOFs) is utilized, so that when the binary metal organic framework material is applied to the electrode material of a super capacitor, excellent cycling stability and high specific discharge capacity are achieved.

Description

technical field [0001] The invention belongs to the field of supercapacitors, and in particular relates to a binary metal-organic framework material applied to supercapacitors and a preparation method thereof. Background technique [0002] A supercapacitor is a new type of energy storage element whose performance is between that of a traditional capacitor and a battery. It has both the high energy density of a battery and the high power density of a traditional capacitor. Supercapacitor has the advantages of simple principle and structure, safety and reliability, wide application range, high power density, short charging time, long service life, energy saving and environmental protection, etc. Its excellent pulse discharge performance and large-capacity energy storage performance make it promising It plays an extremely important role in many fields such as mobile communications, electric vehicles and aerospace, and has broad application prospects. At present, the specific c...

Claims

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Application Information

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IPC IPC(8): H01G11/70H01G11/84
CPCY02E60/13H01G11/24H01G11/26H01G11/30H01G11/48H01G11/86
Inventor 周成冈闫允璠周吟韩波冀转吴金平
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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