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Carbon-selenium composite material, positive pole of lithium-selenium battery, and application of positive pole

A technology of composite materials and self-supporting electrodes, applied in battery electrodes, non-aqueous electrolyte battery electrodes, secondary batteries, etc., can solve the problems of low energy density, achieve the effect of strengthening capillary action, reducing mass, and promoting tight bonding

Inactive Publication Date: 2018-09-07
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, in today's battery technology, aluminum foil is mostly used as a current collector, which accounts for more than 80% of the mass, and the active material is often mixed with conductive carbon and binder, so the actual energy density is low

Method used

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  • Carbon-selenium composite material, positive pole of lithium-selenium battery, and application of positive pole
  • Carbon-selenium composite material, positive pole of lithium-selenium battery, and application of positive pole
  • Carbon-selenium composite material, positive pole of lithium-selenium battery, and application of positive pole

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Weigh 0.12g Triton X-100, 0.78g of aniline and 0.56g of pyrrole, the molar ratio of aniline and pyrrole is 1:1, dissolve in 120ml of deionized water, mix well and pre-cool at 0°C, then Add 1.9 g of ammonium persulfate as an oxidant, stir and react at 0° C. for 12 hours, wash and dry to obtain a product, and carbonize the obtained product in a tube furnace for 10 hours to obtain a nanoporous carbon material.

[0050] After mixing the product and simple selenium in a mass ratio of 1:1.5, weigh 100 mg of the mixed material, grind it fully in a mortar for 20 minutes, then press it into tablets, fill it in a container, and fill the carbon-selenium mixed material with sodium chloride Press the upper and lower sides of the tablet, after sealing, heat the mixture at 260°C for 20 hours under an argon atmosphere, collect the product, weigh 35mg of carbon-selenium composite material and add it to 10ml of water, and mix it with 3ml (3.8mg / ml) graphene oxide Suspension liquid is pre...

Embodiment 2

[0053] Weigh 0.12g Triton X-100, 0.39g of aniline and 0.28g of pyrrole, the molar ratio is 1:1, dissolve in 60ml of deionized water, mix well and pre-cool at 0°C, then add 1.9g of over Ammonium sulfate is the oxidizing agent, stirred and reacted at 0°C for 12 hours, washed and dried to obtain the product. The obtained product was carbonized in a tube furnace for 10 hours to obtain a nanoporous carbon material.

[0054] After mixing the product and simple selenium at a mass ratio of 1:1.5, weigh 100 mg of the mixed material, grind it fully in a mortar, then press it into tablets, fill it in a container, and fill the carbon-selenium mixed material with sodium chloride for tableting. After sealing the upper and lower sides, heat the mixture at 260°C for 20 hours in an argon atmosphere, collect the product, weigh 35mg of carbon-selenium composite material and add it to 10ml of water, and fully ultrasonicate it with 3ml (3.8mg / ml) graphene oxide Finally, it is made into a suspensi...

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Abstract

The invention belongs to the field of energy storage, and particularly relates to a carbon-selenium composite material, a positive pole of a lithium-selenium battery, and an application of the positive pole. The carbon-selenium composite material is of an amorphous crystal phase, has a uniform structure, and consists of hollow porous nano carbon spheres and amorphous selenium distributed in the inner pore channels of the hollow porous nano carbon spheres. In the carbon-selenium composite material provided by the invention, selenium can enter the porous channels of the porous carbon as much aspossible, so that selenium cannot run off from the positive pole in an electrode reaction, so that higher utilization rate and reversibility can be achieved in an electrochemical reaction.

Description

technical field [0001] The invention belongs to the field of energy storage, and in particular relates to a carbon-selenium composite material, a positive electrode of a lithium-selenium battery and applications thereof. Background technique [0002] At present, the energy density of lithium-ion batteries is largely limited by the positive electrode materials. With the continuous progress of society, the commercialized lithium cobalt oxide materials have been unable to meet the further requirements of modern society for lithium-ion batteries due to insufficient capacity and other reasons. . Due to the high theoretical capacity of sulfur, it is regarded as the positive electrode material of a new generation of high-energy lithium batteries. The preparation of various forms of positive electrode materials for lithium batteries is the main direction of the current development of power lithium secondary batteries. At present, there are A large number of literature reports relat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82Y30/00H01M4/36H01M4/38H01M4/587H01M4/62H01M4/66H01M10/0525H01M4/13
CPCB82Y30/00H01M4/13H01M4/362H01M4/38H01M4/587H01M4/62H01M4/625H01M4/663H01M10/0525Y02E60/10
Inventor 李昱戴欣董文达陈浩宋建平邹伟刘洋王洪恩陈丽华阳晓宇苏宝连
Owner WUHAN UNIV OF TECH
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