High-performance supercapacitor electrode materials and preparation method thereof

A technology of supercapacitors and electrode materials, applied in the field of chemistry, can solve the problems of poor conductivity and inevitable reduction, and achieve the effects of low cost, low price and simple process

Inactive Publication Date: 2019-07-05
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although large π-conjugated organic molecules can effectively increase the conductivity, their lower density of redox active sites inevitably reduces the gravimetric and volumetric capacitances.
Small molecules can leave enough space for redox-active metals, but have the disadvantage of poor conductivity

Method used

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  • High-performance supercapacitor electrode materials and preparation method thereof
  • High-performance supercapacitor electrode materials and preparation method thereof
  • High-performance supercapacitor electrode materials and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: Ni-based two-dimensional MOF supercapacitor electrode material

[0037] Step1: At room temperature, weigh 200mg Ni(NO 3 ) 2 ·6H 2 O and 100 mg of 1,4,5,8-naphthalene tetracarboxylic dianhydride were mixed to obtain a mixture.

[0038] Step2: Add the above mixture into a 20ml autoclave equipped with a mixed solvent consisting of 5ml N,N'-dimethylformamide, 5ml ethanol and 5ml water, and stir for 0.5h to obtain a uniformly mixed solution.

[0039] Step3: Heat the homogeneously mixed solution above at 120°C for 24h.

[0040] Step4: Heat the above heat-treated solution at 15°C·h -1 Cool down at the cooling rate until it cools down to room temperature.

[0041] Step5: Filter the mother liquor, wash the obtained solid with ethanol several times, and finally heat and dry to obtain a powder. This powder is the Ni-based two-dimensional MOF supercapacitor electrode material, which is recorded as Ni-MOF.

Embodiment 2

[0042] Embodiment 2: Co-based two-dimensional MOF supercapacitor electrode material

[0043] Step1: At room temperature, weigh 200mg Co(NO 3 ) 2 ·6H 2 O and 100 mg of 1,4,5,8-naphthalene tetracarboxylic dianhydride were mixed to obtain a mixture.

[0044] Step2: Add the above mixture into a 20ml autoclave equipped with a mixed solvent consisting of 5ml N,N'-dimethylformamide, 5ml ethanol and 5ml water, and stir for 0.5h to obtain a uniformly mixed solution.

[0045] Step3: Heat the homogeneously mixed solution above at 120°C for 24h.

[0046] Step4: Heat the above heat-treated solution at 15°C·h -1 Cool down at the cooling rate until it cools down to room temperature.

[0047] Step5: Filter the mother liquor, wash the obtained solid with ethanol several times, and finally heat and dry to obtain a powder. This powder is the Co-based two-dimensional MOF supercapacitor electrode material, which is denoted as Co-MOF.

Embodiment 3

[0048] Embodiment 3: Ni-Co doped two-dimensional MOF supercapacitor electrode material

[0049] Step1: At room temperature, weigh 100mg Co(NO 3 ) 2 ·6H 2 O, 100mgNi(NO 3 ) 2 ·6H 2 O and 100 mg of 1,4,5,8-naphthalene tetracarboxylic dianhydride were mixed to obtain a mixture.

[0050] Step2: Add the above mixture into a 20ml autoclave equipped with a mixed solvent consisting of 5ml N,N'-dimethylformamide, 5ml ethanol and 5ml water, and stir for 0.5h to obtain a uniformly mixed solution.

[0051] Step3: Heat the homogeneously mixed solution above at 120°C for 24h.

[0052] Step4: Heat the above heat-treated solution at 15°C·h -1 Cool down at the cooling rate until it cools down to room temperature.

[0053] Step5: Filter the mother liquor, wash the obtained solid with ethanol several times, and finally heat and dry to obtain a powder. The powder is Ni-Co doped two-dimensional MOF supercapacitor electrode material, which is recorded as Ni-Co-MOF.

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Abstract

The invention discloses high-performance supercapacitor electrode materials and a preparation method thereof. The high-performance supercapacitor electrode materials are Ni-MOF, Co-MOF and Ni-Co-MOF,the three electrode materials are made by taking Ni(NO3)2.6H2Oor / and Co(NO3)2.6H2O and naphthalene-1,4,5,8-tetracarboxylic acid as raw materials by employing a hydrothermal method at a low temperature. Ni and Co are taken as raw materials and are rich on the earth, and the cost is low; the hydrothermal method at low temperature is employed, the process is simple, the condition requirement is low,the cost is low, and the repeatability is good; the preparation Ni-MOF is high in capacitance, and the new electrode material has enormous potential applied to the efficient energy storage device material; and moreover, the prepared CO-MOF is good in capacitance cycle stability, the prepared Ni-Co-MOF is high in capacitance and good in capacitance cycle stability, and the two new electrode materials have enormous potentials applied to the sustainable and efficient energy storage device materials.

Description

technical field [0001] The invention relates to an electrode material and a preparation method thereof, in particular to a high-performance supercapacitor electrode material and a preparation method thereof, and belongs to the field of chemical technology. Background technique [0002] With the depletion of fossil energy, the energy crisis is approaching. The urgent need for reliable and robust energy sources has greatly facilitated the development of new materials for sustainable and efficient energy storage devices. [0003] Supercapacitors (i.e., electrochemical capacitors) are the most promising class of devices for energy storage systems, mainly due to their good properties, such as high energy density, fast charge / discharge speed, and long cycle life. long wait. However, the energy density of supercapacitors is generally lower than that of batteries, so the energy density of supercapacitors needs to be further developed. [0004] Classified according to the energy s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/46H01G11/86
CPCH01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 房贞兰徐宜秀鞠强赵丽娜刘美丽田云徐文龙黄维
Owner NANJING UNIV OF TECH
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