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A kind of silica-modified fluorocarbon material and preparation method thereof

A silicon dioxide and nano silicon dioxide technology, applied in electrical components, battery electrodes, circuits, etc., can solve problems such as insignificant effects, and achieve the effects of improving high-rate performance, increasing the discharge voltage platform, and reducing internal resistance

Active Publication Date: 2017-12-15
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(References Groult H, Julien C M, Bahloul A, et al. Improvements of the electrochemical features of graphite fluorides inprimary lithium battery by electrodeposition of polypyrrole [J]. Electrochemistry Communications, 2011, 13 (10): 1074-1076.) The above The improved method has improved the performance of lithium fluoride batteries to a certain extent, but the effect is not obvious, so it has not been applied in practice

Method used

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  • A kind of silica-modified fluorocarbon material and preparation method thereof
  • A kind of silica-modified fluorocarbon material and preparation method thereof
  • A kind of silica-modified fluorocarbon material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A certain amount of surfactant was added to deionized water, then carbon fluoride was added, and stirred for 4 hours to obtain a uniform mixture. Each 10ml of water corresponds to 0.01g of surfactant and 0.2g of carbon fluoride.

[0022] Spherical nano silicon dioxide and carbon fluoride are added to the mixed solution obtained in step 3 according to a certain ratio, and stirred for 2 hours to obtain a mixed solution.

[0023] The mixture solution was filtered and washed to form a mixture.

[0024] The mixture powder was placed in an atmosphere furnace. Under an inert atmosphere, the temperature of the atmosphere furnace was raised to a constant temperature of 500° C. at a rate of 5° C. / min, and the mixture powder was calcined for 1 hour at the constant temperature. Cool down to room temperature to obtain silica-modified carbon fluoride.

[0025] Described surfactant is sodium lauryl sulfate.

[0026] The mass of the spherical nano silicon dioxide is 3% of the carbon ...

Embodiment 2

[0033] A certain amount of surfactant was added to deionized water, then carbon fluoride was added, and stirred for 4 hours to obtain a uniform mixture. Each 10ml of water corresponds to 0.01g of surfactant and 0.2g of carbon fluoride.

[0034] Spherical nano silicon dioxide and carbon fluoride are added to the mixed solution obtained in step 3 according to a certain ratio, and stirred for 2 hours to obtain a mixed solution.

[0035] The mixture solution was filtered and washed to form a mixture.

[0036] The mixture powder was placed in an atmosphere furnace, and under an inert atmosphere, the temperature of the atmosphere furnace was raised to a constant temperature of 500° C. at a rate of 5° C. / min, and the mixture powder was calcined for 1 hour at the constant temperature. Cool down to room temperature to obtain silica-modified carbon fluoride.

[0037] Described surfactant is cetyltrimethylammonium bromide.

[0038] The mass of the spherical nano silicon dioxide is 3% o...

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Abstract

The invention discloses a silicon dioxide modified carbon fluoride material and a preparation method thereof and belongs to the technical field of batteries. The preparation method comprises processes as follows: (1) a certain quantity of surfactants is added to deionized water, carbon fluoride is added and stirred for 4 h, and a uniform mixed solution is obtained; (2) spherical nanosilicon dioxide and carbon fluoride are added to the mixed solution obtained in the step (1) in a certain proportion and stirred for 2 h, and a mixture solution is obtained; (3) the mixture solution is filtered through suction, washed and dried, and mixture powder is obtained; (4) the mixture powder is calcined in the inert atmosphere; (5) a product is cooled to the room temperature, and the silicon dioxide modified carbon fluoride material is obtained. The discharge voltage platform of a lithium / carbon fluoride battery is improved by utilizing silicon dioxide modified carbon fluoride, the internal resistance is reduced, the high-rate performance is improved, and voltage delay is reduced. Therefore, a primary battery with high discharge capability in the high rate can be provided, and the silicon dioxide modified carbon fluoride material has high industrial and commercial value.

Description

technical field [0001] The invention belongs to the technical field of batteries, in particular to a silica-modified carbon fluoride material and a preparation method thereof. Background technique [0002] Lithium battery is a new type of battery developed gradually after the 1970s. It has the advantages of high capacity, long cycle life, low consumption, small self-discharge, no pollution, no memory effect, small internal resistance, and less pollution. At present, lithium primary batteries mainly include lithium manganese dioxide batteries, lithium thionyl chloride batteries, lithium fluoride batteries, etc. Among them, lithium fluoride batteries have the highest theoretical specific energy among solid batteries, about 2180Wh / kg, and have It has the advantages of long storage life, wide operating temperature range, and environmental friendliness, and has a good application prospect. At present, it is mainly used in military industry, aerospace, precision medicine and othe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/583
CPCH01M4/5835Y02E60/10
Inventor 张丽娟祝艳磊赵惠慧王雪付予
Owner BEIJING UNIV OF TECH
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