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Metal hydroxide coated carbon and sulfur lithium-sulfur battery positive electrode material, and preparation method and application thereof

A hydroxide and lithium-sulfur battery technology, applied in battery electrodes, nanotechnology for materials and surface science, secondary batteries, etc., can solve the problems of cumbersome preparation process, high price, and difficulty in industrialization, and achieve Simple process, low price, and good electrochemical performance

Active Publication Date: 2015-12-02
杭州亿昇达新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, whether it is graphene, graded porous carbon or polymer polymers, the preparation process of these materials is relatively cumbersome, requires strict control of temperature, pH value, atmosphere, etc., and is expensive, and it is still difficult to achieve industrialization.

Method used

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  • Metal hydroxide coated carbon and sulfur lithium-sulfur battery positive electrode material, and preparation method and application thereof
  • Metal hydroxide coated carbon and sulfur lithium-sulfur battery positive electrode material, and preparation method and application thereof
  • Metal hydroxide coated carbon and sulfur lithium-sulfur battery positive electrode material, and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Uniformly grind sublimated sulfur and conductive carbon black in a mortar with a mass ratio of 3:2, heat-treat and melt mix at 155°C for 12 hours in an argon protective atmosphere, and grind to obtain sulfur-carbon black composite powder after cooling;

[0038] 2) Co(NO 3 ) 2 ·6H 2 O, hexamethylenetetramine is dissolved in water, then add polyvinylpyrrolidone and the sulfur carbon black composite powder in step 1), vigorously stir and ultrasonically form a black mixed solution, the concentration of cobalt salt in the black mixed solution is 0.05mol / L, the concentration of hexamethylenetetramine is 0.025mol / L, the concentration of polyvinylpyrrolidone is 0.1g / L, the concentration of sulfur carbon black composite powder is 10g / L, this black mixed solution is poured in the reactor, Hydrothermal reaction at 90°C for 2 hours, after cooling, centrifuge with deionized water, and dry in air at 60°C for 24 hours to obtain a lithium-sulfur battery cathode material coated wi...

Embodiment 2

[0044] 1) Uniformly grind sublimated sulfur and conductive carbon black in a mortar with a mass ratio of 3:2, heat-treat and melt mix at 155°C for 12 hours in an argon protective atmosphere, and grind to obtain sulfur-carbon black composite powder after cooling;

[0045] 2) Ni(NO 3 ) 2 ·6H 2 O, hexamethylenetetramine is dissolved in water, then add polyvinylpyrrolidone and the sulfur carbon black composite powder in step 1), vigorously stir and ultrasonic, form black mixed solution, the concentration of nickel salt in the black mixed solution is 0.05mol / L, the concentration of hexamethylenetetramine is 0.025mol / L, the concentration of polyvinylpyrrolidone is 0.1g / L, the concentration of sulfur carbon black composite powder is 10g / L, this black mixed solution is poured in the reactor, Hydrothermal reaction at 100°C for 2 hours, after cooling, centrifuge with deionized water, and dry in air at 60°C for 24 hours to obtain a lithium-sulfur battery positive electrode material co...

Embodiment 3

[0051] 1) Uniformly grind sublimated sulfur and conductive carbon black in a mortar with a mass ratio of 7:3, heat-treat and melt mix at 155°C for 12 hours in an argon protective atmosphere, and grind to obtain sulfur-carbon black composite powder after cooling;

[0052] 2) Co(NO 3 ) 2 ·6H 2 O, hexamethylenetetramine is dissolved in water, then add polyvinylpyrrolidone and the sulfur carbon black composite powder in step 1), vigorously stir and ultrasonically form a black mixed solution, the concentration of cobalt salt in the black mixed solution is 0.05mol / L, the concentration of hexamethylenetetramine is 0.025mol / L, the concentration of polyvinylpyrrolidone is 0.1g / L, the concentration of sulfur carbon black composite powder is 10g / L, this black mixed solution is poured in the reactor, Hydrothermal reaction at 90°C for 2 hours, after cooling, centrifuge with deionized water, and dry in air at 60°C for 24 hours to obtain a lithium-sulfur battery cathode material coated wi...

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Abstract

The invention discloses a metal hydroxide coated carbon and sulfur lithium-sulfur battery positive electrode material, and a preparation method and an application thereof. The preparation method comprises the following steps: uniformly grinding sublimed sulfur and conductive carbon black, and carrying out heat treatment fusion for uniform mixing to obtain sulfur and carbon black composite powder; and dissolving metal salt and hexamethylenetetramine in water, adding polyvinylpyrrolidone and the sulfur and carbon black composite powder, stirring, carrying out ultrasonic treatment to obtain a black mixed liquor, carrying out hydrothermal treatment on the black mixed liquor at 80-100DEG C for 2-5h, cooling, centrifuging, and drying to obtain the material. The metal hydroxide coated carbon and sulfur lithium-sulfur battery positive electrode material prepared in the invention inhibits the shuttle effect of polysulfide, improves the conductive performance of sulfur, and improves the cycle performances of batteries. The metal hydroxide coated carbon and sulfur lithium-sulfur battery positive electrode material is used to make a lithium-sulfur positive electrode, the lithium-sulfur positive electrode is applied in a lithium-sulfur battery, and the lithium-sulfur battery has high capacity and protruding cycle performances.

Description

technical field [0001] The invention relates to the field of preparation of lithium-sulfur battery positive electrode materials, in particular to a lithium-sulfur battery positive electrode material with metal hydroxide-coated carbon and sulfur, a preparation method and application thereof. Background technique [0002] The crisis of non-renewable energy sources such as fossil fuels is inevitable, and the environmental pollution caused by fossil fuels has become a global problem. Therefore, the development of non-polluting new energy sources is imminent. Energy saving and environmental protection requirements have promoted the development of electric vehicles. The application of electric vehicles requires the power batteries used to have high energy and power density, long service life and acceptable safety performance. Today, lithium-ion batteries have been widely used in portable electronic devices, but traditional lithium-ion batteries, such as commercialized LiCoO 2 The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/38H01M4/625H01M4/628H01M10/0525Y02E60/10
Inventor 王秀丽牛晓青涂江平夏新辉谷长栋
Owner 杭州亿昇达新能源科技有限公司
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