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Method for preparing supercapacitor electrode material by grapes
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A technology of supercapacitors and electrode materials, applied in the field of supercapacitor electrode materials, using grapes to prepare supercapacitor electrode materials, can solve the problems of high process cost and inability to fully control, achieve broad development prospects, strong repeatability, high The effect of specific capacitance
Inactive Publication Date: 2019-08-16
NANJING FORESTRY UNIV
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[0005] The preparation of supercapacitor electrode materials is to mix carbon materials containing active substances with conductive agents and binders to make sauces, and then smear and press to form; As a three-dimensional structure, it is not fully controllable
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Embodiment 1
[0036] A kind of method utilizing grape to prepare supercapacitor electrode material, comprises the following steps:
[0037] S1. After washing the grapes with ethanol and deionized water respectively, dry them at 95° C. for 12 hours;
[0038] S2. Mix the dried grapes with KOH at a mass ratio of 1:2, add 100mL deionized water, and stir magnetically at 25°C for 3h. After the solution is evenly mixed, place it in a crucible and place it in a muffle furnace For pre-carbonization, the temperature was raised to 200°C at a heating rate of 5°C / min, and then to 300°C at a heating rate of 2°C / min, and carbonized for 1 hour to obtain grape-based biomass carbon;
[0040] S4, the grape-based biomass carbonpowder in 3 is placed in the tube furnace, N 2 As a protective gas, the temperature was raised to 400°C at a heating...
Embodiment 2
[0043] A kind of method utilizing grape to prepare supercapacitor electrode material, comprises the following steps:
[0044] S1. After washing the grapes with ethanol and deionized water respectively, dry them at 95° C. for 12 hours;
[0045] S2, combine the dried grapes with H 3 PO 4 According to 8g:40mL, add 100mL deionized water, stir magnetically at 25°C for 3h, mix the solution evenly, place it in a crucible, and place it in a muffle furnace for pre-carbonization, and raise the temperature to 200°C at a heating rate of 5°C / min. ℃, and then heated up to 300°C at a heating rate of 2°C / min, and carbonized for 1 hour to obtain grape-based biomass carbon;
[0046] S3. After the grape-based biomass carbon is ground into powder, it is sieved with a 400-mesh stainless steel sieve to obtain grape-based biomass carbon powder;
[0047] S4, the grape-based biomass carbon powder in 3 is placed in the tube furnace, N 2 As a protective gas, the temperature was raised to 400°C at a ...
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Abstract
The invention discloses a method for preparing supercapacitorelectrode material by grapes. The grapes are used as a carbon material precursor, the electrode material with a three-dimensional multi-stage pore structure and a graphene-like structure is quickly prepared by adding different modifiers and combining low-temperature pre-carbonization with high-temperature carbonization activation, and the cycling performance of the electrode material is enhanced through three-dimensional net structure and the graphene-like structure and different capacitor specific capacitance can be realized. The common biomass grape in life is used as the raw material, the grape is rich in source and low in price, the preparation method has the advantages of simple operation, high repeatability and no pollution to the environment and meets the requirements of sustainable development and environmental protection and can effectively reduce the cost of preparing the electrode material. The prepared biomass grape-based electrode material has high specific capacitance and good cycling stability and is an ideal supercapacitorelectrode material and has a broad development prospect.
Description
technical field [0001] The invention relates to a method for supercapacitor electrode materials, in particular to a method for using grapes to prepare supercapacitor electrode materials, and belongs to the technical fields of electrochemistry and new energy materials. Background technique [0002] In recent years, with the rapid development of the economy, the problem of energy shortage has become increasingly prominent, and high-performance energy storage devices are of great significance to the development of eco-friendly renewable energy. [0003] Supercapacitor is a new type of energy storage device, which can be widely used in energy storage devices due to its advantages such as fast charge and discharge speed, high energy density, high specific power, and long cycle life. Supercapacitors are divided into electric double layer supercapacitors and pseudocapacitive supercapacitors. Electric double layer supercapacitors are based on the electric double layer formed by the ...
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