Air electride

An air electrode and gas permeable layer technology, applied in the field of electrochemistry, can solve the problems of electrolyte leakage or volatilization, affecting battery performance, electrolyte carbonation, etc. Effect

Inactive Publication Date: 2007-03-07
长春天成新电动车改装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The air electrode with this structure has problems such as poor mechanical strength, leakage or volatilization of the electrolyte, and carbonation of the electrolyte, which affects the performance of the battery and limits its application.

Method used

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  • Air electride
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Examples

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Effect test

Embodiment 1

[0018] After mixing 200 grams of tetraphenylporphyrin cobalt and 1000 grams of activated carbon, heat at 700 ° C for 5 hours under the protection of inert nitrogen, then add 20% polytetrafluoroethylene binder and 10 kg of water and stir for 3 hours, at 10Mpa Rolled into a catalytic membrane with a thickness of about 0.1mm. The current collector uses a conductive nickel mesh. The water-repellent air-permeable layer is coated with a mixture of carbon black and 20% polytetrafluoroethylene on the uniaxially stretched nylon film and dried. The leak-proof sealing layer uses a Teflon film perpendicular to the stretching direction of the hydrophobic and air-permeable layer. Put glycerin-free cellophane in the sheeting film, put in the leak-proof sealing layer, water-repellent and breathable layer, conductive skeleton and catalytic membrane in sequence, then cover the catalytic membrane with cellophane, heat at 260°C and pressurize at 10Mpa. , cut into an area of ​​100cm 2 air elect...

Embodiment 2

[0020] After mixing 300 grams of manganese nitrate and 200 grams of activated carbon, heat at 900 ° C for 8 hours under the protection of inert nitrogen to obtain 280 grams of carbon powder containing manganese oxide, then add 250 grams of TritonX-100 binder and 5 kg of water and stir for 3 Hours, rolled into a catalytic membrane with a thickness of about 0.15mm at 8Mpa. The current collector uses a conductive nickel mesh. The hydrophobic air-permeable layer is a unidirectionally stretched Teflon film, and the leak-proof sealing layer uses a Teflon film perpendicular to the stretching direction of the hydrophobic air-permeable layer. Put glycerin-free cellophane in the sheeting film, put in the leak-proof sealing layer, water-repellent and air-permeable layer, conductive skeleton and catalytic membrane in turn, then cover the catalytic membrane with cellophane, heat at 260°C and pressurize at 8Mpa. , cut into an area of ​​100cm 2 air electrode. Polarization test was perform...

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Abstract

An air electrode is composed of a catalytic activity layer, a slip ring, a stretched hydrophobic air pervious layer and leakage proof sealing layer vertical to the direction of the air pervious layerby applying roll to process it with simple structure, good mechanical strength, controllable air flow pass to reduce the loss of electrolyte and influence of Co2 to further increase metal-air batterylife time.

Description

Technical field: [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to an air electrode applied in a metal-air battery. Background technique: [0002] Metal-air batteries use metals with negative electrode potentials such as magnesium, aluminum, zinc, cadmium, iron, etc. as the negative electrode, and oxygen or pure oxygen in the air as the active material of the positive electrode. electrolyte solution. If lithium, sodium, calcium, etc. with more negative electrode potentials are used as negative electrodes, only non-aqueous organic electrolytes or inorganic electrolyte solutions can be used. [0003] The main features of the metal-air battery are: First, because the active material used in the air electrode is the inexhaustible oxygen in the air, the specific energy is high. The theoretical specific energy is generally above 1000wh / kg, and the actual specific energy is 100wh. More than / kg, it is a high-energy chemical powe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M12/06
CPCY02E60/50Y02E60/128
Inventor 刘杰高成和
Owner 长春天成新电动车改装有限公司
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