Carbon-lithium peroxide anode for lithium-air battery and preparation method of carbon-lithium peroxide anode

A lithium-air battery, lithium peroxide technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low stability and cycle performance of lithium-air batteries, and achieve the effects of facilitating promotion, promoting crystallization, and simple preparation process

Inactive Publication Date: 2013-12-25
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a carbon-lithium peroxide positive electrode for lithium-air batteries and a preparation method thereof, so as to effectively solve the problems of low stability and cycle performance of current lithium-air batteries

Method used

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  • Carbon-lithium peroxide anode for lithium-air battery and preparation method of carbon-lithium peroxide anode
  • Carbon-lithium peroxide anode for lithium-air battery and preparation method of carbon-lithium peroxide anode
  • Carbon-lithium peroxide anode for lithium-air battery and preparation method of carbon-lithium peroxide anode

Examples

Experimental program
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Effect test

Embodiment 1

[0038] The ratio of raw materials is 9 grams of carbon, 0 grams of lithium peroxide, 1 gram of polytetrafluoroethylene, and 30 grams of N-methylpyrrolidone (the volume is about 5 times the volume of the mixture of carbon, lithium peroxide and polytetrafluoroethylene) . Firstly, using porous conductive carbon as raw material, it was manually ground with agate mortar or ball mill for 4 hours to make the porous conductive carbon particles uniform, and preliminarily make the pore size distribution reasonable, the material conductivity good and uniform, and the obtained Li 2 o 2Toner with a mass fraction of 0%. Disperse carbon powder into N-methylpyrrolidone (NMP) dispersant, then add polytetrafluoroethylene (PTFE) with a mass of 1 gram, and blend for 4 hours at a temperature of 40-80 ° C in a magnetic heating stirrer to form Viscous suspension containing all positive electrode coating materials. Disperse the viscous suspension evenly on one side of the carbon paper placed on th...

Embodiment 2

[0040] The ratio of raw materials is 7.2 grams of carbon, 1.8 grams of lithium peroxide, 1 gram of polytetrafluoroethylene, and 30 grams of N-methylpyrrolidone. First, use porous conductive carbon and lithium peroxide as raw materials, and use agate mortar to manually grind or ball mill for 4 hours to make the porous conductive carbon and lithium peroxide evenly mixed, and preliminarily make the pore size distribution reasonable and the material conductivity better And uniform, the obtained Li 2 o 2 A homogeneous mixture with a mass fraction of 20%. Disperse the mixture into N-methylpyrrolidone (NMP) dispersant, add polytetrafluoroethylene (PTFE) with a mass of 1 g, and blend for 4 hours at a temperature of 40-80 ° C in a magnetic heating stirrer to form a A viscous suspension of all positive electrode coating materials. Disperse the viscous suspension evenly on one side of the carbon paper placed on the vacuum plate, use strong wind to heat and be driven by an automatic co...

Embodiment 3

[0042] The ratio of raw materials is 5.4 grams of carbon, 3.6 grams of lithium peroxide, 1 gram of polytetrafluoroethylene, and 30 grams of N-methylpyrrolidone. First, use porous conductive carbon and lithium peroxide as raw materials, and use agate mortar to manually grind or ball mill for 4 hours to make the porous conductive carbon and lithium peroxide evenly mixed, and preliminarily make the pore size distribution reasonable and the material conductivity better And uniform, the obtained Li 2 o 2 A homogeneous mixture with a mass fraction of 40%. Disperse the mixture into N-methylpyrrolidone (NMP) dispersant, add polytetrafluoroethylene (PTFE) with a mass of 1 g, and blend for 4 hours at a temperature of 40-80 ° C in a magnetic heating stirrer to form a A viscous suspension of all positive electrode coating materials. Disperse the viscous suspension evenly on one side of the carbon paper placed on the vacuum plate, use strong wind to heat and be driven by an automatic co...

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Abstract

The invention relates to a carbon-lithium peroxide anode for a lithium-air battery and a preparation method of the carbon-lithium peroxide anode. The carbon-lithium peroxide anode comprises a carbon paper current collector and a coating layer on the carbon paper current collector, wherein the coating comprises porous electric-conduction carbon, lithium peroxide and polytetrafluoroethylene. The preparation method comprises the following steps: mixing and grinding the porous electric-conduction carbon and the lithium peroxide so as to obtain a mixture of the carbon and the lithium peroxide; mixing the mixture of the carbon and the lithium peroxide with the polytetrafluoroethylene so as to obtain a mixture I, then dispersing the mixture I in N-Methyl pyrrolidone, heating, stirring, and blending so as to obtain mixed coating slurry; coating the mixed coating slurry on one side of carbon paper, and drying so as to obtain the carbon-lithium peroxide anode for the lithium-air battery. After the anode is assembled to the battery, the primary measurement can proves that the battery can be cycled for hundreds of times, and the stability, the cycle performance and the practicability of the lithium-air battery can be improved basically. The anode can be cut in an arbitrary shape according to needs, the preparation technology is simple, the production cost is low, and the application is wide.

Description

technical field [0001] The invention relates to the technical field of lithium-air batteries, in particular to a carbon-lithium peroxide positive electrode for lithium-air batteries and a preparation method thereof. Background technique [0002] At present, conventional batteries closely related to lithium-air batteries include several types of high-energy batteries such as hydrogen-oxygen fuel cells, lithium-ion batteries, and metal-air batteries. The development of hydrogen-oxygen fuel cells cannot be widely promoted due to the high cost of noble metal catalysts and the difficulty of storing hydrogen. Lithium-ion batteries have been gradually industrialized, and are now the main power source for portable electronic devices such as mobile phones and computers, and are widely used in many fields such as electric vehicles and medical equipment. The positive electrode active material of the lithium-air battery is directly derived from the oxygen of the surrounding air, so it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88
CPCY02E60/50
Inventor 罗仲宽王芳梁春生徐扬海陈静刘东
Owner SHENZHEN UNIV
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