Lithium sulfur battery positive electrode material with high sulfur load as well as preparation method and application thereof

A cathode material and a technology for sulfur batteries, which are applied to cathode materials of high-sulfur-loaded lithium-sulfur batteries, cathode materials of lithium-sulfur batteries, and application fields of lithium-sulfur batteries, can solve the problems of low sulfur load and the like, and achieve low cost of raw materials and high operation efficiency. The effect of strong performance and simple preparation method
CN108232171AActive Publication Date: 2018-06-29CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2018-06-29

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Abstract

The invention discloses a lithium sulfur battery positive electrode material with high sulfur load as well as a preparation method and application thereof. The preparation method of the lithium sulfurbattery positive electrode material with high sulfur load comprises the following step of performing hydrothermal reaction on dispersion liquid containing g-C3N4, graphene oxide, sodium thiosulfate and inorganic acid, thereby obtaining a sulfur / graphene composite material with sulfur load amount of 60-88%. The method is simple to operate, is low-cost, is beneficial for industrial production; andthe composite material is taken as the lithium sulfur battery positive electrode material for preparing a lithium sulfur battery, so that circulating stability is good and specific discharge capacityis high.
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Description

technical field

[0001] The invention relates to a lithium-sulfur battery cathode material, in particular to a high-load sulfur lithium-sulfur battery cathode material, and the use of g-C 3 N 4 The invention relates to a method for synthesizing a high-load sulfur lithium-sulfur battery cathode material as a template agent, and also relates to the application of the lithium-sulfur battery cathode material in preparing a lithium-sulfur battery with excellent electrochemical performance, and belongs to the technical field of lithium-sulfur batteries. Background technique

[0002] The active material of the positive electrode material of the lithium-sulfur battery is sulfur, and the negative electrode is metallic lithium. The theoretical specific capacity of elemental sulfur as a cathode material for lithium-sulfur batteries is as high as 1675mA h g -1 , the theoretical energy density is 2600Wkg -1 At the same time, the price of elemental sulfur is low, safe and non-toxic, and...

Claims

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