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Ordered mesoporous carbon-sulphur nano composite positive pole material and preparation method thereof

A nano-composite, cathode material technology, applied in electrode manufacturing, battery electrodes, active material electrodes, etc., can solve the problems of poor cycle performance and low conductivity, and achieve good high electricity, high sulfur utilization, and good cycle retention. Effect

Inactive Publication Date: 2009-10-28
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an ordered mesoporous carbon-sulfur nanocomposite positive electrode material with good electrochemical activity and its preparation method for the shortcomings of low conductivity and poor cycle performance of sulfur single substance positive electrode materials in lithium ion batteries

Method used

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  • Ordered mesoporous carbon-sulphur nano composite positive pole material and preparation method thereof
  • Ordered mesoporous carbon-sulphur nano composite positive pole material and preparation method thereof
  • Ordered mesoporous carbon-sulphur nano composite positive pole material and preparation method thereof

Examples

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Embodiment 1

[0027] Melt 10.0g phenol in a water bath at 40-42°C in a long-necked flask, add 2.13g 20wt% NaOH aqueous solution under stirring, continue stirring for 10min, then add 17.7g formalin (37wt% formaldehyde) dropwise below 50°C 70-75 It was further stirred for 1 h at °C. Cool to room temperature, adjust the pH to about 7.0 with hydrochloric acid, and dry under vacuum at 50°C to remove water. The product was dissolved in ethanol to prepare a 20 wt.% solution to obtain a phenolic resin prepolymer for use.

[0028] At 40°C, 8g F127(EO 106 PO 70 EO 106 ) and 5.0g of 0.2M hydrochloric acid solution were dissolved in 40g of absolute ethanol, stirred to obtain a clear solution, adding .25.0g mass percent concentration of 20wt.% phenolic resin prepolymer and 10.4g tetraethyl orthosilicate (TEOS), Stir for 5 hours to make TEOS hydrolyze and polycondense initially. The solution was transferred to a watch glass, left to volatilize at room temperature for 5-10 hours, and then heated in a...

Embodiment 2

[0030] After grinding and mixing 0.40 g of the ordered mesoporous carbon prepared in Example 1 and 0.10 g of sublimed sulfur, they were put into a closed container and heat-treated at 150° C. for 12 hours to obtain 0.50 g of ordered mesoporous carbon with a sulfur content of 20wt.%. Sulfur nanocomposites.

Embodiment 3

[0032] After grinding and mixing 0.325g of the ordered mesoporous carbon prepared in Example 1 and 0.175g of sublimed sulfur, put it into a closed container, heat treatment at 150°C for 12h, and obtain 0.50g of ordered mesoporous carbon with a sulfur content of 35wt.%- Sulfur nanocomposites.

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Abstract

The invention provides ordered mesoporous carbon-sulphur nano composite positive pole material and preparation method thereof, which relates to nano composite material, especially ordered mesoporous carbon-sulphur composite positive pole suitable for lithium-sulphur secondary battery and preparation method thereof. The invention provides an ordered mesoporous carbon-sulphur nano composite positive pole material with excellent electrochemical activity and preparation method thereof. The material comprises ordered mesoporous carbon and sublimed sulfur, wherein, the content of component sulphur is 20-80 mass percent of ordered mesoporous carbon-sulphur nano composite positive pole material. The method provided by the invention includes the steps: synthesizing ordered mesoporous carbon; mixing prepared ordered mesoporous carbon and sublimed sulfur according to stoichiometric ratio, putting them into an air-tight container, heating for melting and compounding sulphur, and acquiring ordered mesoporous carbon-sulphur nano compound positive pole material.

Description

technical field [0001] The invention relates to a nanocomposite material, in particular to an ordered mesoporous carbon-sulfur composite positive electrode suitable for a lithium-sulfur secondary battery and a preparation method thereof. Background technique [0002] Rechargeable lithium batteries are now widely used in portable electronic devices such as mobile phones, cameras, and PCs. They have important commercial value and are expected to become energy storage devices for electric vehicles and hybrid vehicles that have emerged in recent years. At present, the cathode materials of commercial lithium-ion batteries are oxide cathode materials such as LiCoO 2 , LiMn 2 o 4 and LiFePO 4 Wait for the main. These traditional cathode materials have relatively low theoretical specific capacities, which are far from meeting the requirements of high specific energy batteries. As a cathode material for lithium-ion batteries, sulfur has a very high theoretical specific capacity ...

Claims

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Application Information

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IPC IPC(8): H01M4/02H01M4/38H01M4/66H01M4/04
CPCY02E60/12Y02E60/10
Inventor 孙世刚陈书如赵东元姜艳霞翟赟璞黄令
Owner XIAMEN UNIV
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