Process for preparing lithium sulfur battery modified anode

A lithium-sulfur battery and modification technology, which is applied in the field of electrochemical batteries, can solve the problems of poor cycle stability of lithium-sulfur batteries, achieve the effects of weakening the shuttle effect, improving utilization rate, and improving cycle performance
CN102867940AInactive Publication Date: 2013-01-09WUHAN INSTITUTE OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN INSTITUTE OF TECHNOLOGY
Publication Date
2013-01-09
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention relates to a preparation for a lithium sulfur battery modified anode material. The preparation includes mixing sublimed sulfur and a conductive agent according to a mass ratio of 6:3, adding absolute ethyl alcohol, performing ball milling for 6 hours, drying in a vacuum drying box for 12 hours at the temperature of 50 DEG C to 80 DEG C to obtain a mixture, mixing the mixture and hollow nickel fiber tubes according to a mass ratio of (5-9):1, adding an adhesive, dispersing in a dispersing agent, stirring to obtain slurry, coating the slurry on a metal aluminum foil which is subjected to acetone ultrasonic cleaning, and drying in the vacuum drying box for 12 hours at the temperature of 60 DEG C to obtain the lithium sulfur battery anode material. The preparation for the lithium sulfur battery modified anode material has the advantages that electrochemistry performances of battery cyclicity and the like are improved, and the performances and cyclic service life of the battery can be improved.
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Description

technical field

[0001] The invention belongs to the field of electrochemical batteries, in particular to the preparation of a lithium battery modified cathode material. Background technique

[0002] As a positive electrode material, elemental sulfur has the advantages of high specific capacity, low price, and low toxicity. The theoretical specific capacity of elemental sulfur is 1675mAh / g, and the theoretical specific energy is 2600Wh / kg, which is the currently known cathode material (LiCoO 2 , LiNiO 2 , LiMn 2 o 4 The theoretical specific capacity is 275mAh / g, 274mAh / g, 148mAh / g), which is the highest among the specific capacities, far greater than the lithium secondary batteries that have been commercialized at the present stage, and is a positive electrode material with broad application prospects.

[0003] However, the poor electrochemical activity and cycle stability of sulfur limit its commercial practical application. Sulfur is an electronic and ion insulator (co...

Claims

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