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Capacitor carbon and preparation method thereof

A capacitance carbon and specific capacitance technology, applied in the field of capacitance carbon, can solve the problems of high cost, long operation process, and long preparation process route, and achieve the effects of low cost, simplified process flow, and excellent electrochemical performance

Active Publication Date: 2021-08-03
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, each step in the conventional preparation method of biomass-based capacitor carbon materials needs to be carried out step by step, which makes the preparation process long, the operation process is long, and the cost is high.

Method used

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  • Capacitor carbon and preparation method thereof
  • Capacitor carbon and preparation method thereof
  • Capacitor carbon and preparation method thereof

Examples

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preparation example Construction

[0041] The main technological process of the preparation method of the capacitance carbon that the embodiment of the present invention proposes is as follows figure 1 As shown, it mainly includes impregnating additives and calcining steps; the specific steps are as follows:

[0042] 1) Clean the biomass raw material.

[0043] The biomass raw material of the present invention mainly uses agricultural and forestry waste biomass, preferably corn leaves, straw, rice husks, and fruit husks, but not limited thereto.

[0044] 2) Step of impregnating additives: crushing and sieving the cleaned biomass raw materials, then immersing them in the additive solution for impregnation treatment, and then drying the impregnated biomass raw materials to obtain the biomass impregnated with additives raw material.

[0045]Wherein, the additive is selected from one or both of ammonium dihydrogen phosphate and diammonium hydrogen phosphate. The mass ratio of the biomass raw material to the addit...

Embodiment 1

[0056] The present embodiment prepares a kind of capacitor carbon, and specific preparation steps are as follows:

[0057] 1) Cleaning: clean and dry the biomass raw material corn leaves.

[0058] 2) Impregnating additives: crush the corn leaves cleaned in step 1), and then pass through a 60-mesh sieve. Get 10g of sieved corn leaf particles and soak them in the diammonium hydrogen phosphate solution (wherein the mass ratio of corn leaves and diammonium hydrogen phosphate is 1:2; the water content in the diammonium hydrogen phosphate solution ensures that the diammonium hydrogen phosphate solution can immerse corn leaves), stirring and impregnating for 6 hours and then drying to obtain corn leaves impregnated with diammonium hydrogen phosphate.

[0059] 3) Calcination (carbon fixation-carbonization-activation-doping): put the corn leaves impregnated with diammonium hydrogen phosphate into a tube furnace, and calcinate under nitrogen atmosphere; specifically, firstly, at a heat...

Embodiment 2

[0061] This example prepares a capacitor carbon. Compared with example 1, this example differs from step 2), and other steps are the same. Wherein, step 2) of the present embodiment is specifically as follows:

[0062] 2) Impregnating additives: crush the corn leaves cleaned in step 1), and then pass through a 60-mesh sieve. Get 10g of sieved corn leaf and soak in the diammonium hydrogen phosphate solution (wherein, the mass ratio of corn leaf and diammonium hydrogen phosphate is 1:0.1; the water content in the diammonium hydrogen phosphate solution ensures that the diammonium hydrogen phosphate solution can Just immerse the corn leaves), stir and impregnate for 12 hours and then dry to obtain corn leaves impregnated with diammonium hydrogen phosphate.

[0063] The other steps are the same.

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Abstract

The invention relates to capacitor carbon and a preparation method thereof. According to the main technical scheme, the preparation method of the capacitor carbon comprises the following steps: immersing a crushed and sieved biomass raw material into an additive solution for immersion treatment, and then drying the biomass raw material subjected to immersion treatment to obtain an additive-impregnated biomass raw material, the additive being a compound containing nitrogen and phosphorus; calcining the additive-impregnated biomass raw material impregnated in a protective atmosphere, raising the calcining temperature to 100-350 DEG C, preserving heat for a first set time, raising the calcining temperature to 400-1000 DEG C, and preserving heat for a second set time to obtain a calcined product; and washing and drying the calcined product to obtain the capacitor carbon. The four effects of carbon sequestration, carbonization, activation and doping are achieved through the calcination one-step method. The technology has the advantages that raw materials are low in price and easy to obtain, the technological process is short, the operation is easy, the cost is low, the yield is high, and the performance is good. Industrial production and commercial application of the capacitor carbon can be achieved easily.

Description

technical field [0001] The invention relates to the technical field of capacitor carbon, in particular to capacitor carbon and a preparation method thereof. Background technique [0002] Supercapacitor, also known as electrochemical capacitor, is a new green and pollution-free energy storage device. It has the characteristics of fast charging and discharging, long service life, high power density, and high energy conversion efficiency. It is used in electric vehicles, smart grids and Portable electronic equipment and other fields have broad application prospects. Supercapacitors are mainly composed of electrode materials, diaphragms, electrolytes, current collectors and other components. Among them, electrode materials are the key to determining the electrochemical performance of supercapacitors. To realize the commercial application of electrode materials, it is necessary to develop a preparation technology with short process route, low cost, high yield and good performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/342C01B32/324
CPCC01B32/342C01B32/324Y02E60/13
Inventor 袁淑霞周敬杰
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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