rGO-LiOH micro-spring/wood composite electrode material and preparation method and application thereof

Abstract

The invention provides an rGO-LiOH micro-spring / wood composite electrode material and a preparation method and application thereof. The method comprises the steps that 1, lithium carbonate, graphene oxide and deionized water are subjected to ultrasonic smashing and then freeze drying, and aerogel of LiCO3 and GO is obtained; 2, moisture in the aerogel of LiCO3 and GO is removed, then the aerogel is subjected to heat preservation for 2-5 h at the temperature of 1000-1200 DEG C in nitrogen or inert gas, and an rGO-LiOH micro spring is obtained; and 3, the rGO-LiOH micro spring is blown into a pore channel of the carbonized delignified wood to obtain the electrode material with high three-dimensional specific capacitance, high elasticity, high porosity and high specific surface area. The electrode material can be further assembled into an elastic capacitor or a wearable capacitor, so that any electronic equipment within the range of the capacitor can be driven.

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...

Examples

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...

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...

Examples

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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