Cathode material used for lithium sulfur battery, preparation and application thereof

A cathode material, lithium-sulfur battery technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of sulfur electrochemical inertness and poor cycle stability, reduced battery charge and discharge efficiency, and low electrode capacity utilization, etc. The effect of cycle stability, good selectivity, good catalytic activity
CN105322189AActive Publication Date: 2016-02-10DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2016-02-10

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Abstract

The invention relates to a cathode material used for a lithium sulfur battery, preparation and an application thereof. The cathode material employs one or more than two carbides or nitrides of metal elements from transition metal as a catalytic component and employs elementary sulfur as an active component. The catalytic component is supported on a carrier firstly and then the active component is supported on the carrier on which the catalytic component is supported. The content of the catalytic component is 2-30% of the total weight of the cathode material and the content of the sulfur is 30-80% of total weight of the cathode material, and the balanced is the carrier. The cathode material, when being used as a cathode in the lithium sulfur battery, has excellent selectivity on reduction of elementary sulfur and reduces reaction energy barrier required for sulfur reduction, reduces reaction polarization and increases discharge voltage platform. The cathode material is environment-friendly, is low in cost and is abundant in resources.
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Description

technical field

[0001] The invention relates to a positive pole of a lithium-sulfur battery, in particular to a positive pole material and its preparation and application. Background technique

[0002] In recent years, with the continuous advancement of science and technology and the rapid development of various electronic products, the chemical power sources used are required to have the characteristics of light weight, small size, and large capacity. In order to meet the needs of society and greatly increase the energy density of batteries, the development of new materials and new systems is necessary.

[0003] The lithium-sulfur secondary lithium battery is one of the battery systems with a relatively high theoretical discharge capacity among known lithium-ion batteries. Among the cathode materials for batteries, elemental sulfur is abundant, cheap and environmentally friendly. The density of elemental sulfur is 1.96g / cm 3 , with a theoretical specific capacity of 1675...

Claims

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