Method for preparing lithium sulfide electrode based on electrochemical means

A lithium sulfide, electrochemical technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low utilization rate of active materials, poor cycle stability, low coulombic efficiency of lithium-sulfur batteries, etc. Achieving the effect of simple process

Pending Publication Date: 2022-04-15
HANGZHOU DIANZI UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

Because with this method, lithium sulfide cannot be uniformly mixed with carbon materials, resulting in low utilization of active materials, low coulombic efficiency of lithium-sulfur batteries, and poor cycle stability

Method used

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  • Method for preparing lithium sulfide electrode based on electrochemical means
  • Method for preparing lithium sulfide electrode based on electrochemical means

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Embodiment Construction

[0025] In order to better illustrate the process and solutions of the present invention, the following inventions will be further described in conjunction with the accompanying drawings and embodiments. The specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0026] The present invention proposes a method for preparing lithium sulfide electrodes based on electrochemical means, see figure 1 shown, including the following steps:

[0027] S1, add 10 to 100 grams of cobalt sulfide or nickel sulfide and 100 grams of phenolic resin into 100 ml of alcohol, and use shear emulsification to mix the materials evenly, and the shear emulsification speed is 5000 to 10000 rpm;

[0028] S2, the mixed material obtained in S1 is vacuum-dried in a box furnace for 12 hours, and the drying temperature is 100 degrees Celsius;

[0029] S3, treating the mixed material of cobalt sulfide or nickel sulfide and phenolic resin obtained...

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Abstract

The invention discloses a method for preparing a lithium sulfide electrode based on an electrochemical means. The method comprises the following steps: S1, adding 10-100g of cobalt sulfide or nickel sulfide and 100g of phenolic resin into 100ml of alcohol; s2, carrying out vacuum drying on the mixed material obtained in S1 in a box-type furnace; s3, the mixed material of cobalt sulfide or nickel sulfide and phenolic resin obtained in S2 is subjected to high-temperature treatment in the argon atmosphere and then naturally cooled, and a mixed material of cobalt sulfide or nickel sulfide and carbon is obtained; s4, mixing the mixed material of cobalt sulfide or nickel sulfide and carbon obtained in S3 with multi-walled carbon nanotubes and polyvinylidene fluoride; s5, aluminum foil is coated with the colloidal material obtained in the step S4 and then dried in a vacuum drying oven; s6, taking the electrode obtained in the step S5 as a positive electrode and a lithium metal sheet as a negative electrode, discharging in the electrolyte in an argon atmosphere, and stopping discharging when the voltage is reduced to 0.02 V; and S7, taking out the positive plate discharged in the step S6 under the protection of argon, cleaning the positive plate in acetone, and carrying out vacuum drying at 100 DEG C to obtain the lithium sulfide electrode.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for preparing lithium sulfide electrodes based on electrochemical means. Background technique [0002] Due to the harm to the environment caused by the extensive use of fossil energy, renewable energy will be the main form of human energy in the future. However, renewable energy has the disadvantage of being unstable. In order to use it more effectively, it is necessary for us to store it. Charge-discharge batteries will play a full role in this field, and the performance of charge-discharge batteries is greatly affected by electrode materials. Lithium sulfide is considered as a next-generation charge-discharge battery material because of its high theoretical specific capacity of 1165mAh / g. [0003] However, to realize the commercialization of lithium sulfide electrodes, there are still some problems, including poor electronic and ionic conduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1397
Inventor 李仕琦冷丹倪瑞黄澳旗朱铧丞
Owner HANGZHOU DIANZI UNIV
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