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rgo-lioh microspring/wood composite electrode material and its preparation method and application

A composite electrode and micro-spring technology, which is used in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, can solve problems such as no reports, and achieve the effects of reducing internal resistance, high specific surface area, and increasing load capacity.

Active Publication Date: 2021-06-29
西安执唯诺威电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, it is expected to prepare an electrode material with high specific capacitance, high elasticity, high porosity and high specific surface area by using the above-mentioned electric double layer characteristics and arched structure pores of carbonized wood, but there is no report in this regard yet.

Method used

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  • rgo-lioh microspring/wood composite electrode material and its preparation method and application
  • rgo-lioh microspring/wood composite electrode material and its preparation method and application

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preparation example Construction

[0035] A kind of preparation method of the elastic electrode material that the rGO-LiOH micro-spring of the present invention is a kind of 3D and wood compound comprises the following steps:

[0036] Step 1, prepare 100ml of 1-3mol / L lithium carbonate solution, take 0.1-0.5g of self-made graphene oxide, add 50-300ml of deionized water and disperse it with an ultrasonic cell pulverizer for 10-30min, at -50--5℃ freeze-dried for 2-4 hours to obtain LiCO 3 and GO airgel;

[0037] Ultrasonic cell pulverizer fully mixes graphene oxide and lithium carbonate, and pulverizes large pieces of graphene oxide so that it can enter wood pores; working frequency is 20-24KHz, ultrasonic power is 200-600W, temperature: 25-40°C ;

[0038] Step 2, the LiCO 3 Put the airgel with GO into a tube furnace for temperature programming, and raise the temperature to 130-300°C in the air at room temperature at a rate of 2-15°C / min for 2-4 hours to remove moisture;

[0039] Then raise the temperature to...

Embodiment 1

[0047] A kind of 3D rGO-LiOH miniature spring of the present invention and the preparation method of the composite elastic electrode material of wood comprise the following steps,

[0048] Step 1, prepare 150ml of 1mol / L lithium carbonate solution, take 0.1g of self-made graphene oxide, add them to 50ml of deionized water, disperse with ultrasonic cell pulverizer for 30min, and freeze-dry at -50°C for 3h to obtain LiCO 3 and GO airgel;

[0049] The working frequency of the ultrasonic cell pulverizer is 20KHz, the ultrasonic power is 300W, and the temperature is 30°C;

[0050] Step 2, the LiCO 3 Put the aerogel with GO into a tube furnace, heat up the temperature program, keep it at room temperature at 5°C / min to 150°C for 2 hours, and then keep it at 10°C / min to 1000°C for 2 hours. After the temperature drops to room temperature, take out the material and place it in a dry place. In the device, the rGO microspring supported by LiOH is obtained;

[0051] Step 3, cut a wood c...

Embodiment 2

[0055] A kind of 3D rGO-LiOH miniature spring of the present invention and the preparation method of the composite elastic electrode material of wood comprise the following steps,

[0056] Step 1, prepare 200ml of 1.5mol / L lithium carbonate solution, take 0.15g of self-made graphene oxide, add them to 50ml of deionized water, disperse them with an ultrasonic cell pulverizer for 20min, and freeze-dry them at -20°C for 4h to obtain LiCO 3 and GO airgel;

[0057] The working frequency of the ultrasonic cell pulverizer is 22KHz, the ultrasonic power is 250W, and the temperature is 32°C;

[0058] Step 2, the LiCO 3 The airgel with GO was put into a tube furnace, and the temperature was raised by program. The temperature was kept at 7°C / min to 180°C for 4 hours, and then kept at 15°C / min to 1100°C for 2.5 hours. After the temperature dropped to room temperature, the material was taken out and placed in a In the desiccator, the rGO microspring supported by LiOH is obtained;

[00...

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Abstract

The present invention provides rGO-LiOH micro-spring / wood composite electrode material and its preparation method and application. The method includes step 1, ultrasonically pulverizing lithium carbonate, graphene oxide and deionized water and then freeze-drying to obtain LiCO 3 and GO airgel; step 2, the LiCO 3 After the moisture in the airgel with GO is removed, heat it at 1000-1200°C for 2-5 hours in nitrogen or inert gas to obtain rGO-LiOH micro-springs; step 3, blow the rGO-LiOH micro-springs into the carbonized In the pores of lignin wood, an electrode material with three-dimensional high specific capacitance, high elasticity, high porosity and high specific surface area is obtained. The electrode material can be further assembled into elastic capacitors or wearable capacitors, which can drive any electronic device within the range of the capacitor.

Description

technical field [0001] The invention belongs to the technical field of biomass energy, specifically rGO-LiOH microspring / wood composite electrode material, preparation method and application. Background technique [0002] Supercapacitors have the advantages of flexible capacity configuration, easy modular design, long cycle life, wide operating temperature range, environmental friendliness, and maintenance-free, which make them more suitable for harsh working environments. In recent years, with the development of carbon nanotechnology, the manufacturing cost of supercapacitors has been continuously reduced, while its power density and energy density have been continuously improved, which will further expand and accelerate the application of supercapacitors in new electric energy storage. [0003] Among the supercapacitor electrode materials, carbon electrode materials have become the most widely used electrode materials due to their porous, high specific surface area structu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30H01G11/32H01G11/44
CPCH01G11/24H01G11/30H01G11/32H01G11/44H01G11/86
Inventor 熊传银李冰冰李萌瑞杨祺党伟华段超
Owner 西安执唯诺威电子科技有限公司
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