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A kind of preparation method of lithium sulfide/carbon composite material

A carbon composite material and lithium sulfide technology, which is applied in the preparation/purification of carbon, alkali metal sulfide/polysulfide, electrochemical generator, etc., can solve the problem of increasing the preparation process, not being easy to industrialized production, and increasing the preparation cost, etc. problems, to achieve the effects of reducing the preparation process, easy industrial production, and low cost

Active Publication Date: 2019-10-18
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two types of methods need to prepare lithium sulfide first, and then carry out carbon coating, which not only increases the preparation process but also greatly increases the preparation cost. These methods are not easy for industrial production

Method used

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  • A kind of preparation method of lithium sulfide/carbon composite material
  • A kind of preparation method of lithium sulfide/carbon composite material
  • A kind of preparation method of lithium sulfide/carbon composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Under an argon atmosphere, 0.0625 mol of lithium hydride and 0.066 mol of carbon disulfide were added to the reactor and sealed. The mixture was heated to 350 °C at a rate of 1 °C / min and kept for 12 h. After the reaction is finished and cooled, the gas in the reactor is collected first, and then the solid product is taken out of the reactor under the protection of an argon atmosphere, and the lithium sulfide / carbon composite material is obtained.

Embodiment 2

[0028] Under a nitrogen atmosphere, 0.05 mol of lithium hydride and 0.166 mol of carbon disulfide were added to the reactor and sealed. The mixture was heated up to 200 °C at a rate of 2 °C / min and kept for 6 h. After the reaction is completed and cooled, the gas in the reactor is collected first, and then the solid product is taken out of the reactor under the protection of a helium atmosphere, and the lithium sulfide / carbon composite material is obtained.

Embodiment 3

[0030] Under a nitrogen / argon mixed atmosphere, 0.125 mol lithium hydride and 0.05 mol carbon disulfide were added to the reactor and sealed. The mixture was heated to 450 °C at a rate of 5 °C / min and kept for 1 h. After the reaction is completed and cooled, the gas in the reactor is collected first, and then the solid product is taken out of the reactor under the protection of a mixed atmosphere of helium / argon to obtain a lithium sulfide / carbon composite material.

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Abstract

The invention discloses a method of preparing a lithium sulfide / carbon composite material in situ. Lithium hydride and carbon disulfide are adopted as raw materials of the lithium sulfide / carbon composite material; the method comprises the steps of mixing lithium hydride with carbon disulfide at the molar ratio of 1:(0.25-10), putting into a reactor, heating the mixture to 50-800 DEG C at the heating rate of 0.1-50 DEG C / min and reacting for 0-12h; and after reacting and cooling, collecting gas in the reactor, taking a solid product out of the reactor under the protection of inert atmosphere to obtain the lithium sulfide / carbon composite material. The lithium sulfide / carbon composite material is generated by using the lithium hydride and the carbon disulfide under the heating condition in situ, so that one-step in situ preparation of the lithium sulfide / carbon composite material is achieved and the preparation process is greatly reduced.

Description

[0001] (1) Technical field [0002] The invention relates to a preparation method of lithium sulfide / carbon composite material. [0003] (2) Background technology [0004] At present, there are two main methods for synthesizing lithium sulfide / carbon composite materials: the first method is to first coat the organic matter on the surface of lithium sulfide, and then calcine the organic matter at high temperature under the protection of atmosphere to carbonize the organic matter to obtain lithium sulfide / carbon composite material. (L. M. Suo, Y. J. Zhu, F. D. Han, T. Gao, C. Luo, X. L. Fan, Y. S. Hu, C. S. Wang, Carbon cage encapsulating nano-cluster Li 2 S by ionic liquidpolymerization and pyrolysis for high performance Li–S batteries, NanoEnergy., 2015, 13:467-473 ); the second method is to place lithium sulfide in a tube furnace, and then coat the surface of lithium sulfide by vapor deposition A layer of carbon (C. Nan, Z. Lin, H. Liao, M. Song, Y. Li, E.J. Cairns, Durable C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/587H01M4/62H01M10/0525C01B17/22C01B32/05
CPCC01B17/22C01P2002/72C01P2004/03C01P2004/04C01P2004/80H01M4/362H01M4/5815H01M4/587H01M4/625H01M10/0525Y02E60/10
Inventor 张文魁梁升梁初陈云夏阳黄辉甘永平张俊陶新永
Owner ZHEJIANG UNIV OF TECH