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Carbon fluoride composite positive electrode and preparation method thereof

A composite positive electrode, carbon fluoride technology, applied in the direction of primary battery electrodes, battery electrodes, electrical components, etc., can solve the problems of not significantly improving the discharge platform of lithium fluoride carbon batteries, uneven dispersion of CFx, etc., to reduce hydrophilicity and hydrophilicity. The effect of poor oiliness, high current efficiency and stable structure

Inactive Publication Date: 2015-03-25
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, none of the above methods can solve the problem of uneven dispersion of CFx, so the discharge platform of lithium carbon fluoride batteries has not been significantly improved.

Method used

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  • Carbon fluoride composite positive electrode and preparation method thereof
  • Carbon fluoride composite positive electrode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Pure aluminum foil with a thickness of 0.01 mm is used as the substrate, fluorinated graphite with a fluorocarbon atomic ratio of 1.03 and a particle size of 5-10 μm is used as the raw material, carbon nanotubes are used as the carbon conductive agent, and polyvinylidene fluoride is used as the binder. The integrated carbon fluoride positive electrode is prepared by the following process:

[0050] (1) Clean fluorocarbon and carbon conductive agent

[0051]Add fluorinated graphite and carbon conductive agent to the mixed solution of ethanol and water with a volume ratio of 1:1, and wash under the condition of temperature of 40°C and stirring speed of 200 rpm, with the oscillating frequency of 30kHz ultrasonic wave 10min;

[0052] (2) Preparation of composite coating

[0053] After the fluorinated graphite and carbon conductive agent washed in step (1) are uniformly mixed with the binder, they are added to N-methylpyrrolidone (NMP) and stirred for 6 hours at a stirring ...

Embodiment 2

[0068] Pure aluminum foil with a thickness of 0.02mm is used as the substrate, fluorinated carbon nanotubes with a fluorocarbon ratio of 0.85 and a particle size of 10-15 μm are used as raw materials, acetylene black is used as a carbon conductive agent, and polyvinylidene fluoride is used as a binder. The integrated carbon fluoride positive electrode is prepared by the following process:

[0069] (1) Clean fluorocarbon and carbon conductive agent

[0070] Add fluorinated carbon nanotubes and carbon conductive agent to the mixed solution of ethanol and water with a volume ratio of 1:2. Under the condition of temperature of 40°C and stirring speed of 200 rpm, the ultrasonic wave was assisted by an oscillation frequency of 30kHz. Wash for 10 minutes;

[0071] (2) Preparation of composite coating

[0072] After mixing the fluorinated carbon nanotubes and carbon conductive agent and the binder after step (1) washing, they were added to N-methylpyrrolidone (NMP) and stirred for 8...

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Abstract

The invention discloses a carbon fluoride composite positive electrode and a preparation method of the carbon fluoride composite positive electrode. According to the carbon fluoride composite positive electrode, an aluminum foil is used as a substrate, and the surface of the substrate sequentially comprises a composite coating containing carbon fluoride, carbon conductive and adhesives and a nickel-containing plating layer from bottom to top. The preparation method comprises the following steps: adding carbon fluoride, carbon conductive and adhesives into organic solvents for stirring uniformly to obtain mixed slurries; coating the surface of the aluminum foil by the obtained mixed slurries; drying and forming the compound coating on the surface of the aluminum foil; plating the nickel-containing plating layer on the surface of the composite coating by means of chemical nickel plating; performing thermal treatment and rolling; cutting into electrode positive electrodes. The preparation method is easy to operate, mild in process conditions and low in cost; the prepared composite positive electrode is stable in structure and high in conductivity and can be used for preparing a lithium carbon fluoride battery with high specific capacity and high current efficiency.

Description

technical field [0001] The invention relates to a carbon fluoride composite positive electrode and a preparation method thereof, belonging to battery positive electrode materials. Background technique [0002] Lithium is the primary battery with the largest theoretical specific energy (2180Wh / kg), and has the advantages of environmental protection and pollution-free, high safety, wide temperature range (-30-80°C), stable working voltage, etc., and has a good application prospect. [0003] At present, the application of lithium fluoride carbon battery is less, the main reasons are as follows: (1) fluoride carbon is relatively expensive, which leads to the high price of lithium fluoride carbon battery; (2) the poor conductivity of fluoride carbon leads to lithium fluoride The discharge efficiency of carbon batteries is low; (3) the surface energy of carbon fluoride is low, resulting in uneven dispersion of carbon fluoride positive electrode materials, poor hydrophilic and lipo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/136H01M4/1397
CPCH01M4/06H01M4/366H01M4/582H01M6/14
Inventor 潘勇朱岭潘俊安李磊田槟铖周洁
Owner XIANGTAN UNIV
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