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Hydrogen evolution cell with cathode pouch

A technology of battery and hydrogen evolution, which is applied in the direction of hybrid battery components, electrodes, electrolysis process, etc., can solve the problems of damage to battery life, leakage, etc., and achieve the effect of minimizing the risk of leakage

Active Publication Date: 2017-06-20
VARTA MICROBATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Therefore, such hydrogen evolution cells have several potential leak points or structural designs that can cause leaks that compromise the service life of the cell

Method used

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  • Hydrogen evolution cell with cathode pouch
  • Hydrogen evolution cell with cathode pouch
  • Hydrogen evolution cell with cathode pouch

Examples

Experimental program
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Embodiment Construction

[0075] figure 1 The illustrated hydrogen evolution cell 100 includes a two-part prismatic housing 110 having a housing cover 112 and a housing cup 118 . The shell cup 118 includes a planar bottom region 116 and the shell cover 112 includes a planar cover region 114 parallel to the bottom region 116 .

[0076] Cell 100 includes a metal anode 120, preferably made of zinc paste, an aqueous alkaline electrolyte such as aqueous caustic potash, and a binder.

[0077] Furthermore, the cell 100 comprises a hydrogen cathode 140 in the form of a cathode composite forming a hollow body.

[0078] Cathode assembly 140 is formed from two foil-type cathode bodies 142 and 148, preferably in the form of half-cathode assemblies. Preferably, cathode bodies 142 and 148 are in each case gas diffusion electrodes, in particular polymer bonded gas diffusion electrodes.

[0079] In each case microporous hydrophobic foils 143 and 145 , preferably PTFE foils, are laminated to cathode bodies 142 and 1...

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Abstract

The invention relates to a hydrogen evolution battery (100), which releases hydrogen gas when an electric current passes, and the release amount is proportional to the passing current, and the hydrogen evolution battery (100) comprises an electrochemically oxidizable anode (120), a hydrogen cathode (140) , the electrolyte and the casing (110) surrounding them, wherein the hydrogen cathode (140) is included in the structure of at least one bag (170) that defines a hollow space (150) or a hydrogen overpressure time limit A hollow space (150) is defined, or the cathode forms such a pocket (170).

Description

technical field [0001] The invention relates to a hydrogen evolution battery. Background technique [0002] Such a hydrogen evolution cell comprises an anode compartment and a cathode compartment within a casing, the compartments being separated from each other by means of a separator. [0003] Corresponding batteries comprise a metal anode in the form of zinc paste, a hydrogen electrode and an aqueous electrolyte, as are known, for example, from DE3532335A1 and EP1396899A2. [0004] In hydrogen evolution cells, the hydrogen reactant gas is chemically stored in the form of water as the main component of the electrolyte, and is usually not pressurized. [0005] In the case of a battery with a metal anode made of zinc, the hydrogen evolution reaction takes place with the following equation: [0006] Anode reaction: Zn+2OH - →ZnO+H 2 O+2e - [0007] Cathodic reaction: 2H 2 O+2e - →2OH - +H 2 [0008] Total reaction: Zn+H 2 O→ZnO+H 2 [0009] Therefore, during the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M12/06H01M12/02C25B9/17C25B9/19
CPCC25B1/04C25B11/075C25B11/031C25B1/02C25B9/00Y02E60/36
Inventor M·克雷布斯R·哈恩M·施马尔茨
Owner VARTA MICROBATTERY