Method for manufacturing carbon-sulfur composite, carbon sulfur composite manufactured thereby, and electrochemical device including same

A composite, carbon-sulfur technology

Inactive Publication Date: 2015-01-07
IUCF HYU (IND UNIV COOP FOUND HANYANG UNIV)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the problem with these existing technologies is that the capacity performance and life performance of lithium-sulfur batteries cannot be greatly improved.

Method used

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  • Method for manufacturing carbon-sulfur composite, carbon sulfur composite manufactured thereby, and electrochemical device including same
  • Method for manufacturing carbon-sulfur composite, carbon sulfur composite manufactured thereby, and electrochemical device including same
  • Method for manufacturing carbon-sulfur composite, carbon sulfur composite manufactured thereby, and electrochemical device including same

Examples

Experimental program
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Effect test

Embodiment 2

[0045] Preparation of carbon-sulfur complex

[0046] In order to fill the hollow carbon spheres with sulfur, the hollow carbon spheres obtained in Example 1 and sulfur were subjected to the first heat treatment at 600° C. for 4 hours in a Y-shaped glass tube in a vacuum state at a mass ratio of 1:5, Thus producing carbon-sulfur complexes.

Embodiment 3

[0047] Preparation of electrodes and batteries

[0048] The carbon-sulfur composite prepared in Example 2-1, the carbon black conductive material and the polyethylene oxide binder were mixed in an acetonitrile solvent at a ratio of 60:20:20 to prepare a slurry. The prepared slurry was coated on aluminum foil to a thickness of 40 μm, rolled, and then dried at 50° C. to remove residual solvent.

[0049] A lithium-sulfur battery was fabricated using the obtained positive plate and lithium foil negative electrode. At this time, the LiSO 3 CF 3 A solution prepared by dissolving in tetraethylene glycol dimethyl ether (TEGDME) at a ratio of 4:1 was used as the electrolyte solution.

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Abstract

The present invention relates to a method for manufacturing a carbon-sulfur composite, a carbon-sulfur composite manufactured by the method, and an electrochemical device including the same. Since the carbon-sulfur composite manufactured by the carbon-sulfur composite manufacturing method of the present invention is evenly distributed by filling up sulfur inside a hollow carbon ball, the sulfur content increases, and thus the capacity increases. The composite also has stable life cycles since the electrode structure is not destroyed even if the sulfur becomes a liquid state during a charge / discharge process.

Description

technical field [0001] The invention relates to a preparation method of a carbon-sulfur compound, the carbon-sulfur compound thus prepared and an electrochemical device containing the same. Background technique [0002] With the rapid development of mobile electronic devices, the demand for secondary batteries is increasing. In particular, batteries with high energy density are urgently required to meet the trend of reducing the size, weight, and thickness of mobile electronic devices, and the batteries need to meet the requirements of cheapness, safety, and environmental protection. [0003] A lithium-sulfur battery is a secondary battery that uses a sulfur-based compound with a sulfur-sulfur combination as the positive electrode active material and a carbon-based material as the negative electrode active material. Alkali metals such as lithium or metal ions such as lithium ions Intercalation or extraction is performed in the carbon-based material. They store and generate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/583H01M4/38H01M10/36
CPCH01M4/583H01M10/36H01M4/38H01M4/36H01M4/13H01M4/625H01M2300/0028C01P2004/62C01B32/05H01M10/052H01M10/0568H01M10/0569Y02E60/10H01M4/04H01M4/364
Inventor 宣良国李东柱朴主源
Owner IUCF HYU (IND UNIV COOP FOUND HANYANG UNIV)
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