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Secondary battery based on graphene aerogel/sulphur composite material

A technology of graphene airgel and composite materials, applied in the fields of electrochemistry and new energy products, can solve the problems of easy stacking of graphene, uneven compounding, complicated process, etc., to improve cycle performance, facilitate dispersion, and simple process Effect

Inactive Publication Date: 2014-12-10
NANJING ZHONGCHU NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome defects such as complex process, non-uniform compounding, easy stacking of graphene and disordered structure in the synthesis process of existing graphene-sulfur composite materials, the invention provides a graphene-containing airgel Sulfur-based composite material and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1, preparation of graphene airgel: Use graphene oxide powder and deionized water to configure an aqueous solution with a concentration of 10 mg / ml, ultrasonically oscillate for 5 hours, and then add 100 ml of the configured graphene oxide aqueous solution to the hydrothermal reaction kettle, and heat it at 150 React at ℃ for 24 hours to prepare graphene oxide hydrogel, then put the graphene oxide hydrogel in ammonia water, soak at 150℃ for 24 hours, freeze-dry for 24 hours to obtain graphene oxide aerogel.

[0036]Step 2, preparation of graphene airgel / sulfur composite material: put sulfur and graphene airgel with a mass ratio of 1:10 in a tube furnace, heat to 500°C under nitrogen protection, and keep it warm for 12h, that is Graphene airgel / sulfur composites were obtained.

[0037] Step 3, preparation of secondary aluminum battery: dry and cut the prepared graphene airgel / sulfur composite positive electrode material into 40mm wide × 15mm long 0.33mm thick pole pi...

Embodiment 2

[0040] Step 1, preparation of graphene airgel: Use graphene oxide powder and deionized water to configure an aqueous solution with a concentration of 8 mg / ml, ultrasonically oscillate for 3 hours, then add 200 ml of the configured graphene oxide aqueous solution to the hydrothermal reaction kettle, and heat at 180 React at ℃ for 20 hours to prepare graphene oxide hydrogel, then put graphene oxide hydrogel in ammonia water, soak at 150℃ for 36 hours, freeze-dry for 24 hours to obtain graphene oxide airgel.

[0041] Step 2, preparation of graphene airgel / sulfur composite material: put sulfur and graphene airgel with a mass ratio of 1:10 in a tube furnace, heat to 330°C under nitrogen protection, and keep it warm for 10h, that is Graphene airgel / sulfur composites were obtained.

[0042] The preparation and testing methods of the battery are the same as in Example 1. The measured open-circuit voltage of the battery is 1.76V, the highest discharge capacity is 748mAh, and the disch...

Embodiment 3

[0044] Step 1, preparation of graphene airgel: Use graphene oxide powder and deionized water to configure an aqueous solution with a concentration of 6 mg / ml, ultrasonically oscillate for 4 hours, then add 150 ml of the configured graphene oxide aqueous solution to the hydrothermal reaction kettle, and heat at 200 React at ℃ for 20 hours to prepare graphene oxide hydrogel, then put graphene oxide hydrogel in ammonia water, soak at 150℃ for 20 hours, freeze-dry for 24 hours to obtain graphene oxide aerogel.

[0045] Step 2, preparation of graphene airgel / sulfur composite material: put sulfur and graphene airgel with a mass ratio of 1:10 in a tube furnace, heat to 550°C under nitrogen protection, and keep it warm for 24h, that is Graphene airgel / sulfur composites were obtained.

[0046] The preparation and testing methods of the battery are the same as in Example 1. The measured open-circuit voltage of the battery is 1.80V, the highest discharge capacity is 760mAh, and the disc...

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Abstract

The invention provides a secondary battery based on a graphene aerogel / sulphur composite material. The invention discloses a secondary aluminum which comprises an anode, an aluminum-containing cathode and a non-aqueous electrolyte. The anode is made of the graphene aerogel / sulphur composite material, the cathode is made of metal aluminum or aluminum alloy, and the electrolyte is non-aqueous aluminum-containing electrolyte.

Description

technical field [0001] The invention belongs to the field of electrochemical and new energy products, and relates to a secondary aluminum battery, in particular to a secondary aluminum battery with a graphene airgel / sulfur composite material as the positive electrode. Background technique [0002] With the rapid development of new power sources such as electronic and communication equipment, electric vehicles, wind power and photovoltaic power generation, human beings have higher and higher demands on battery performance for supporting power sources, and there is an urgent need to develop power batteries and energy storage batteries. The theoretical volume specific capacity of aluminum is 8050mAh / cm 3 , is 4 times that of lithium, and the chemical activity is stable, it is an ideal negative electrode material; the theoretical volume specific capacity of sulfur is 3467mAh / cm 3 , is one of the cathode materials with the highest energy density known. Therefore, as positive an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/62H01M10/054
CPCH01M4/362H01M4/62H01M10/054H01M2004/021Y02E60/10
Inventor 赵宇光钟毓娟
Owner NANJING ZHONGCHU NEW ENERGY
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