Lithium-carbon composite material and preparation method thereof
A carbon composite material and lithium powder technology, used in metal processing equipment, electrodes for primary batteries, non-aqueous electrolyte batteries, etc., can solve the problem of increasing the cost of metal lithium raw materials, the processing cost of negative electrodes, the difficulty in improving product quality, and the extremely high temperature and humidity control requirements. Advanced problems, to achieve the effect of good strength, lower production energy consumption cost, and stable structure
Active Publication Date: 2020-12-25
LONG POWER SYST NANTONG CO LTD
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[0002] Primary lithium-manganese batteries are widely used in the market because of their advantages such as stable voltage platform, long storage time, and wide temperature range. At present, the negative electrode preparation method of traditional lithium-manganese batteries is metal lithium strip and electrode. Ear welding, due to the very active characteristics of lithium metal, makes it very demanding on the temperature and humidity control of the process environment, making it difficult to improve product quality, and at the same time increases the raw material cost and negative electrode processing cost of lithium metal
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[0023] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with the embodiments and accompanying drawings. The embodiments are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.
[0024] The invention provides a preparation method of a lithium-carbon composite material, comprising the following steps:
[0025] S1. Preparation of a micron lithium powder mixed solution: metal lithium is dispersed by liquid phase buoyancy in an organic solvent to obtain a micron lithium powder mixed solution.
[0026] S2, adjusting the solid content of the lithium powder: the micron lithium powder mixed solution in step S1 is left still, and a part of the organic solvent in the micron lithium powder mixed solution is discharged, so that the solid content of the lithium powder in the mixed solution is adjusted. to 25% to 35%.
[0027] S3. Pre...
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The preparation method comprises the following steps: S1, preparing a micron lithium powder mixed solution; S2, adjusting the solid content of lithium powder; S3, preparing a lithium-carbon mixed solution; and S4, preparing a lithium-carbon composite material. The lithium-carbon composite material prepared by an organic solvent liquid-phase buoyancy dispersion process and an organic solvent gas-phase sedimentation coating process is a negative electrode material of a primary lithium-manganese battery, so that the technical problem of metal lithium in practical application is solved; and particularly, the safety risk problem caused by the activity of metal lithium in the negative electrode preparation process of the primary lithium-manganese battery is solved, the processing cost is effectively reduced; and meanwhile, the electrical properties such as the discharge current multiplying power and the energy density of the primary lithium-manganese battery are improved.
Description
Technical field: [0001] The invention relates to the technical field of primary lithium batteries, in particular to a lithium-carbon composite material and a preparation method thereof. Background technique: [0002] Primary lithium-manganese batteries are widely used in the market because of their advantages such as stable voltage platform, long storage time, and wide temperature range. At present, the negative electrode preparation method of traditional lithium-manganese batteries is metal lithium strip and electrode. Ear welding, due to the very active characteristics of lithium metal, makes it very demanding on the temperature and humidity control of the process environment, making it difficult to improve product quality, and at the same time increases the raw material cost and negative electrode processing cost of lithium metal. [0003] Based on this, in order to make up for the deficiencies of the prior art, the present invention provides a lithium-carbon composite ma...
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IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M6/14
CPCH01M4/366H01M4/382H01M4/625H01M6/14B22F1/107B22F1/16B22F2009/042B22F2999/00B22F1/05H01M4/12B22F2201/11C22C1/0408C22C1/05B22F1/12B22F9/06B22F2301/054B22F2302/40
Inventor 黄碧英黄耀泽唐天文
Owner LONG POWER SYST NANTONG CO LTD