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Zinc-air cell catalyst, preparation and air electrode manufacturing method

An air battery and air electrode technology, which is applied in the direction of catalyst activation/preparation, battery electrodes, chemical instruments and methods, etc., can solve the problems of low discharge current density of air electrodes, low current density of air electrodes, and poor water resistance of air electrodes, and achieve Avoid ablation failure, high current discharge and pulse discharge performance, good waterproof performance

Inactive Publication Date: 2009-06-10
GUIZHOU MEILING POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the air electrodes of zinc-air batteries produced by the prior art have problems such as low discharge current density, serious "sweating" phenomenon, and short service life, mainly as follows:
[0004] ① The current density of the air electrode is small
The discharge current density of the air electrode is low due to the low catalytic activity of existing catalysts
[0005] ②The phenomenon of "sweating" is serious
The air electrode made according to the traditional method is poor in water resistance. After a short period of use, small droplets will appear on the surface of the air electrode, thereby blocking the passage of oxygen into the interior of the battery. This phenomenon is called "sweating".
Due to the existence of "sweating" phenomenon, the battery's electrical performance will gradually fail

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1 of the present invention: by weight, get C: 73 parts of activated carbon (105#, 380 mesh) material, Pb (NO 3 ) 2 : 8 parts, Mn(NO 3 ) 2 : 9 parts, nickel powder (350 mesh): 10 parts, mix well, mix evenly, under the situation of strong stirring and mixing uniformly, roast at the temperature of 250 ℃ ~ 400 ℃ to obtain C-Pb-Mn-Ni catalyst. The prepared C-Pb-Mn-Ni (carbon-lead-manganese-nickel) catalytic active material: 81-86 parts; binder: 8-12 parts; dispersant: 6-7 parts. Roll the powder prepared according to the above ratio to form a paste pole piece with a thickness of 1 mm to 2 mm, and sinter the rolled pole piece at a temperature range of 250°C to 400°C. The high-performance air electrode is formed by pressing the sintered pole piece on the metal current collector.

Embodiment 2

[0013] Embodiment 2 of the present invention: by weight, get C: 80 parts of activated carbon (105#, 380 mesh) material, Pb (NO 3 ) 2 : 5 parts, Mn(NO 3 ) 2 : 7 parts, nickel powder (350 mesh): 8 parts, mixed uniformly, sintered under the temperature situation of 250 ℃~400 ℃ to obtain C-Pb-Mn-Ni catalytic active material, all the other are the same as embodiment 1.

Embodiment 3

[0014] Embodiment 3 of the present invention: by weight, get C: 77 parts of activated carbon (105#, 380 mesh) material, Pb (NO 3 ) 2 : 6 parts, Mn(NO 3 ) 2 : 8 parts, nickel powder (350 mesh): 9 parts, mixed uniformly, sintered under the temperature situation of 250 ℃~400 ℃ to obtain C-Pb-Mn-Ni catalytic active material, all the other are the same as embodiment 1.

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Abstract

The invention discloses a zinc-air cell catalyst. The catalyst is a C-Pb-Mn-Ni catalytic activity substance which comprises the following compositions by weight portion: 73 to 80 portions of C, 5 to 8 portions of Pb(NO3)2, 7 to 9 portions of Mn(NO3)2 and 8 to 10 portions of Ni; and the compositions are mixed and sintered to form the catalyst. The method for manufacturing an air electrode taking C-Pb-Mn-Ni catalytic activity substance as the catalyst comprises: according to weight portion, 81 to 86 portions of the C-Pb-Mn-Ni catalyst, 8 to 12 portions of adhesive and 6 to 7 portions of dispersant are weighed to manufacture a powder material; the powder material is subjected to sheet rolling; the thickness of a rolled electrode sheet is between 1 and 2 mm; the rolled electrode sheet is sintered and molded within the temperature range between 250 and 400 DEG C; and the sintered electrode sheet is pressed on a metal current collecting body to obtain the air electrode. The zinc-air cell has the advantages of large density of discharge current, good waterproof performance and long service life.

Description

technical field [0001] The invention relates to a zinc-air battery air electrode catalyst, a method for manufacturing the catalyst and an air electrode using the catalyst, and belongs to the technical field of zinc-air batteries. Background technique [0002] Zinc-air batteries have the advantages of high specific energy (theoretical specific energy is as high as 1350Wh / kg, and actual specific energy has reached 220Wh / kg-300Wh / kg), stable working voltage, good safety, and no pollution. [0003] However, the air electrodes of zinc-air batteries produced by the prior art have problems such as low discharge current density, serious "sweating" phenomenon, and short service life, mainly as follows: [0004] ① The current density of the air electrode is small. When the zinc-air battery is working, the positive active material oxygen must be able to freely enter the air electrode, and at the same time, under the action of the catalyst, it is adsorbed on the surface of the carrier ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B01J21/18B01J23/755B01J37/00H01M4/88H01M12/06
CPCY02E60/50
Inventor 林甘红张云朋魏俊华王庆杰王琦
Owner GUIZHOU MEILING POWER SUPPLY CO LTD
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