Rapidly packaged double-sided soft lithium-air battery and preparation method thereof

A lithium-air battery, fast technology, applied in the direction of battery electrodes, battery pack parts, battery box/coating, etc., can solve the problem of reducing the gas exchange rate between oxygen and air positive electrodes, the regional capacity cannot be effectively utilized, and the positive electrode reaction is uneven To avoid the use of heat sealing process, prevent volatilization and penetration of external water vapor, and reduce the exposure time

Active Publication Date: 2017-05-31
CHINA AUTOMOTIVE BATTERY RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current studies have not considered the impact of stratification between the gas-permeable membrane and the air positive electrode on the uniform reaction and capacity of the air positive electrode. Due to the oxidation of the discharge product at the air positive electrode to generate oxygen during charging, the lithium negative electrode will be damaged in the presence of moisture. A hydrogen evolution reaction will occur to generate hydrogen gas, which is easy to accumulate between the gas-permeable membrane and the positive air electrode, resulting in stratification between the gas-permeable membrane and the positive air electrode, resulting in uneven gaps, which in turn make it difficult for oxygen to pass through during subsequent reactions. The film evenly reaches the positive electrode of the air, which eventually leads to uneven reaction of the positive electrode, and the capacity of some areas cannot be effectively utilized; at the same time, the gap between the layers reduces the rate of gas exchange between the oxygen and the air positive electrode

Method used

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  • Rapidly packaged double-sided soft lithium-air battery and preparation method thereof
  • Rapidly packaged double-sided soft lithium-air battery and preparation method thereof
  • Rapidly packaged double-sided soft lithium-air battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) The surface of one side of the breathable membrane is evenly coated with a pressure-sensitive adhesive layer: Coat the polytetrafluoroethylene emulsion on the glass fiber cloth, after drying and sintering, activate the one side, and apply a coating on the activated surface. The cloth machine is coated with a silicone pressure-sensitive adhesive layer, and the thickness of the silicone pressure-sensitive adhesive layer is 10 μm;

[0036] (2) Positive electrode current collector loaded positive electrode material: configure Super P: PTFE slurry with a mass ratio of 8:2, spray the slurry on the surface of one side of the 55 μm thick aluminum mesh by spraying, and control the carbon load to 10 mg / cm 2 , put it into the muffle furnace after rolling, and keep it warm at 350°C for 30min;

[0037] (3) The air-permeable film and the positive electrode current collector are bonded through the pressure-sensitive adhesive layer: the sides of the upper and lower air-permeable fi...

Embodiment 2

[0042] (1) The surface of one side of the breathable membrane is uniformly coated with a pressure-sensitive adhesive layer: select a 100 μm thick polytetrafluoroethylene single-stretched film, activate one side, and coat the activated surface with a coating machine. Silicone pressure-sensitive adhesive layer, the thickness of the silicone pressure-sensitive adhesive layer is 15 μm;

[0043] (2) Positive electrode current collector loaded positive electrode material: configure carbon nanotubes: PTFE slurry with a mass ratio of 9:1, use the coating method to spray the slurry on one side of the 90 μm thick carbon paper, and control the carbon load to 5mg / cm 2 , after being hot-pressed at 200°C 10Mpa, put it into the muffle furnace, and keep it at 350°C for 30min;

[0044] (3) The air-permeable film and the positive electrode current collector are bonded through the pressure-sensitive adhesive layer: the sides of the upper and lower air-permeable film coated with the pressure-se...

Embodiment 3

[0049] (1) Evenly coat the pressure-sensitive adhesive layer on one side of the gas-permeable membrane: first, activate the 150 μm polyvinylidene fluoride membrane on one side, and apply a butyl acrylate pressure-sensitive adhesive layer on the activated surface with a coating machine , the thickness of the adhesive layer is 30 μm;

[0050] (2) Current collector loaded positive electrode material: configure graphene: PTFE slurry with a mass ratio of 9:1, use the coating method to evenly coat the slurry on one side of the 90 μm thick carbon paper, and control the carbon load to 3mg / cm 2 , put it into the muffle furnace after being hot-pressed at 200°C 10Mpa, and keep it warm at 350°C for 30 minutes, then put the pole piece into the condensation sputtering apparatus, load gold nanoparticles by sputtering deposition method, and the current size is controlled at 10mA, deposition time is 80s;

[0051] (3) The air-permeable film and the positive electrode current collector are bo...

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Abstract

The invention discloses a rapidly packaged double-sided soft lithium-air battery and a preparation method thereof. An upper gas-permeable membrane, an upper pressure sensitive adhesive layer, an upper anode current collector, a first anode material, a first diaphragm, a lithium cathode, a second diaphragm, a second anode material, a lower anode current collector, a lower pressure sensitive adhesive layer and a lower gas-permeable membrane are sequentially laminated, filled with electrolyte and packaged to form the battery. Compared with the prior art, the battery is rapidly packaged by directly adhering the edge of the upper pressure sensitive adhesive layer with the edge of the lower pressure sensitive adhesive layer without heat sealing. In addition, the gas-permeable membranes and the anode current collectors are closely fitted together, so that the lithium-air battery has the advantages of uniform reaction, high specific energy, good consistency and the like.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a rapidly packaged double-sided soft-packed lithium-air battery and a preparation method thereof. Background technique [0002] Lithium-air battery is a kind of high specific energy chemical power source with metal lithium or lithium-containing alloy as the negative electrode and oxygen in the air as the positive electrode reactant. advantage. As a promising new battery system, the technology roadmaps of various countries clearly regard lithium-air batteries as one of the key directions for the research and development of new battery systems in the future. It has broad application prospects in many fields. [0003] Since the positive electrode reactant of the lithium-air battery is oxygen in the air, when the battery is discharged, oxygen enters from the outside to the positive electrode to undergo an oxygen reduction reaction (ORR); when the battery is charged, oxygen is pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M4/36H01M4/62H01M4/66H01M12/08
CPCH01M4/366H01M4/621H01M4/667H01M12/08H01M50/116H01M50/124Y02E60/10
Inventor 赵尚骞张立孙浩博张刚宁李久铭杨容唐玲庄卫东李永伟卢世刚
Owner CHINA AUTOMOTIVE BATTERY RES INST CO LTD
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