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Preparation method of rare earth composite biomass-based capacitor carbon material

A technology of rare earth compounding and biomass raw materials, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, carbon compounds, etc., to achieve the effects of reducing costs, improving mass specific capacitance, and concentrating distribution

Active Publication Date: 2020-11-20
NANCHANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of this, the object of the present invention is to provide a method of rare earth composite biomass-based capacitor carbon material to solve the problems of energy density, cycle stability and specific capacitance

Method used

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  • Preparation method of rare earth composite biomass-based capacitor carbon material
  • Preparation method of rare earth composite biomass-based capacitor carbon material
  • Preparation method of rare earth composite biomass-based capacitor carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: according to figure 1 The process shown, (1) Carbonization: dry the iron leaf raw material at 120 °C for 24 h, then mechanically pulverize, pass through a 100-mesh sieve, weigh 10 g of biomass powder and place it in a porcelain boat, and place it in a tube furnace Carbonization was carried out in 500 °C, the heating rate was 10 °C / min, argon was used as the protective gas, and the carbonization time was 60 min to obtain black carbon powder.

[0034] (2) Impurity removal: add 100 mL of pre-configured 4% H 2 SO 4 Solution, then add 10g of black carbon powder into the three-necked bottle, soak for 24h, then heat and stir to reflux, the reaction time is 2h, then filter, wash, and dry at 120°C for 24h, you can get carbon precursor.

[0035] (3) Synergistic coupling activation: Grind the carbon precursor, pass through a 100-mesh sieve, weigh 10 g of the carbon precursor, put it in a crucible, add a pre-configured 8 wt% sodium hydroxide solution for impregnati...

Embodiment 2

[0041] Embodiment 2: Change the biomass raw material to be rice husk, and the activation temperature is raised to 850 o C, other conditions are as embodiment 1. The specific surface area and pore volume of the prepared carbon material are 651 m 2 / g and 0.43 cm 3 / g. The mass specific capacitance is 167.32 F / g, and the volume specific capacitance is 179.91 F / cm 3 , The capacitance retention rate is 99.92%.

Embodiment 3

[0042] Embodiment 3: change the concentration of activator to be the NaOH solution of 10 wt%, the activation temperature is raised to 850 o C, other conditions are as embodiment 1. The specific surface area and pore volume of the prepared carbon material are 685 m 2 / g and 0.36 cm 3 / g, the specific capacitance value is 176.92 F / g, and the volume specific capacitance is 205.72 F / cm 3 , The capacitance retention rate is 99.70%.

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Abstract

The invention discloses a preparation method of a rare earth composite biomass-based capacitor carbon material, which comprises the following steps: by using rice husk, straw, straw, folium cycas andbamboos as raw materials, and carrying out low-temperature carbonization, alkali liquor low-temperature impregnation, alkali liquor etching activation and rare earth high-temperature compounding by using a chemical activation method to prepare the rare earth composite capacitor carbon material. By mastering the action mechanism of rare earth ions or rare earth compounds and adopting trace doping compounding, the capacitor carbon material is modified, and the specific capacitance, cycle life and other properties of the capacitor carbon are further improved. Finally, the advantages of the rare earth material are utilized to the maximum extent, the cost is reduced, and the application prospect of the rare earth material in the future energy storage field is wider. According to the method, agricultural and forestry waste biomass resources which are rich in reserves, cheap and easy to obtain are used as raw materials, the biomass resources are reasonably utilized, and the method has great significance in stabilizing agricultural ecological balance, improving the energy structure and relieving environmental pressure.

Description

technical field [0001] The invention relates to a preparation method of a rare earth composite biomass-based capacitor carbon material, belonging to the field of biomass functional materials. Background technique [0002] With the increasing development of human society, the consumption of fossil resources has reached the limit, which has led to serious environmental pollution and depletion of non-renewable resources. Vigorously developing green and renewable energy is the primary issue to solve the harmonious and sustainable development of human society. Green renewable energy such as wind energy, water energy, solar energy, and tidal energy all have problems such as geographical restrictions, discontinuity, instability, and difficulty in control. Therefore, it is necessary to vigorously develop new energy technologies and high-performance energy storage devices to resolve this contradiction, and realizing effective storage and utilization of energy has become the key to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/34H01G11/86H01G11/24H01G11/30H01G11/26C01B32/336C01B32/324C01B32/348
CPCH01G11/34H01G11/86H01G11/24H01G11/30H01G11/26C01B32/336C01B32/348C01B32/324Y02E60/13
Inventor 隋光辉程岩岩
Owner NANCHANG NORMAL UNIV
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