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Super capacitor electrode material and preparation method thereof

A technology of supercapacitors and electrode materials, applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., can solve the problem of lower energy density than batteries, and achieve high oxygen species mobility, low binding energy and high rate capability. Effect

Pending Publication Date: 2022-08-05
YANGZHOU POLYTECHNIC INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the invention: the carbon material has good electrical conductivity, high specific surface area, low density, controllable pore structure, cheap price, and good chemical corrosion resistance, but its energy density is less than one-tenth of that of batteries

Method used

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  • Super capacitor electrode material and preparation method thereof
  • Super capacitor electrode material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] The ammoniated porous carbon fiber is prepared by the following steps:

[0028] A1. Preheat 15g pitch to 220°C and blow air for 30min, heat to 350°C and hold for 4h, add 3g of PVP and spin into fiber, then heat up to 600°C under argon flow and carbonize for 30min to obtain carbon fiber;

[0029] A2. Mix 1g of carbon fiber with 1g of KOH and activate it under argon flow to 800°C for 1h, and use 5mL of HNO with a concentration of 5M 3 Oxidize at 80 °C for 1 h, then in NH with a flow rate of 50 mL / min and a volume ratio of 1:10 3 and argon atmosphere at 400 ℃ for 1 h to obtain ammoniated porous carbon fibers.

Embodiment 2

[0031] The ammoniated porous carbon fiber is prepared by the following steps:

[0032] A1. Preheat 18g pitch to 220°C and blow air for 30min, heat to 350°C and hold for 4h, add 4g of PVP and spin into fiber, then heat up to 600°C under argon flow and carbonize for 30min to obtain carbon fiber;

[0033] A2. Mix 1 g of carbon fiber with 1 g of KOH and activate it under argon flow to 800 °C for 1 h, and use 8 mL of HNO with a concentration of 5M 3 Oxidize at 80 °C for 1 h, then in NH with a flow rate of 50 mL / min and a volume ratio of 1:10 3 and argon atmosphere at 400 ℃ for 1 h to obtain ammoniated porous carbon fibers.

Embodiment 3

[0035] The ammoniated porous carbon fiber is prepared by the following steps:

[0036] A1. Preheat 20g pitch to 220°C and blow air for 30min, heat to 350°C and hold for 4h, add 5g of PVP and spin into fiber, then heat up to 600°C under argon flow for 30min carbonization to obtain carbon fiber;

[0037] A2. Mix 1g of carbon fiber with 1g of KOH and activate it under argon flow to 800°C for 1h, and use 10mL of HNO with a concentration of 5M 3 Oxidize at 80 °C for 1 h, then in NH with a flow rate of 50 mL / min and a volume ratio of 1:10 3 and argon atmosphere at 400 ℃ for 1 h to obtain ammoniated porous carbon fibers.

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Abstract

The invention relates to a supercapacitor electrode material and a preparation method thereof, and belongs to the technical field of new energy, and the preparation method comprises the following steps: adding cellulose nanocrystal powder into a polyamic acid solution, heating and annealing in a tubular furnace under a nitrogen atmosphere, and cooling to room temperature; ultrasonically dispersing the carbonized polyimide and ammoniated porous carbon fibers in an ethanol solution to obtain a carbonized polyimide / cellulose-porous carbon fiber composite material; performing ultrasonic dispersion on the mixed solution, a MnSO4 solution and ammonium persulfate in N, N-dimethylformamide to obtain an electrode active material; an electrode active material, carbon black and polytetrafluoroethylene are dispersed in an ethanol solution to form paste, then a foamed nickel current collector is coated with the mixture, and the supercapacitor electrode material is obtained through pressing and drying. The porosity of the material is increased by compounding ammoniated porous carbon fibers on carbonized polyimide / cellulose, and gamma-MnO2 is deposited in situ, so that the energy density of the electrode material is greatly increased.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a supercapacitor electrode material and a preparation method thereof. Background technique [0002] Supercapacitor is a new type of energy device between rechargeable batteries and capacitors, which has both the high power density of traditional capacitors and the similar energy density of batteries. It has the advantages of small size, large capacity, fast charging speed, long cycle life, high discharge efficiency, wide operating temperature range, good reliability and pollution-free maintenance. It can be used as a high-power pulse power supply in data memory storage systems, portable instruments Instruments, backup power supplies, communication equipment, computers, electric welding machines, magnetizers, flashers, hybrid power supplies for electric vehicles and other fields have broad application prospects. [0003] The performance of the supercapacitor is rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/36H01G11/40H01G11/34
CPCH01G11/86H01G11/24H01G11/40H01G11/36H01G11/34Y02E60/13
Inventor 王万川房瑜静单丹
Owner YANGZHOU POLYTECHNIC INST
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