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Electrochemical zinc-water hydrogen making and storing method

A water hydrogen production, electrochemical technology, applied in the direction of chemical instruments and methods, electrochemical generators, inorganic chemistry, etc., can solve the problems of non-reusable, complicated hydrogen production process, complex hydrogen charging process, etc., to achieve convenient combination, Good controllability and high energy storage density

Inactive Publication Date: 2006-11-01
黄潮 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrogen storage alloy is more expensive, the alloy is easy to pulverize during the hydrogen charging and discharging process, and the hydrogen charging process is more complicated
Currently more advanced is the patented technology with the patent name "Electrochemical Aluminum-Water Hydrogen Storage and Hydrogen Production Method and Equipment" (application number: 02148850.9), which is composed of aluminum alloy electrode-electrolyte-highly active hydrogen evolution catalyst electrode The two-phase circulating filtration closed system composed of plates has the advantages of high efficiency, safety, and environmental protection. Its disadvantage is that the aluminum alloy electrodes are disposable consumables and cannot be reused. After each hydrogen production, the aluminum alloy electrodes need to be replaced, and the consumption is relatively high. Big
In addition, the aluminum oxide produced needs to be filtered out by pump circulation, and the hydrogen production process is more complicated, which increases the cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Get 1.5 grams of conductive carbon black, 6.0 grams of zinc oxide, 1.5 grams of mercury-free zinc powder, 3.3 milliliters of polyvinyl alcohol 3% aqueous solution, 25 milliliters of sodium carboxymethylcellulose 2 percent aqueous solution, and 4 milliliters of polytetrafluoroethylene (PTFE) emulsion (10% mass concentration), stir evenly, heat to form a ball, and roll to form a sheet. The zinc electrode pressed on the 60-mesh brass net, the PPAT-AS-SL8 film of Shanghai Shilong Company as the diaphragm, the nickel foam sheet as the oxygen evolution electrode, and the nickel foam coated with Pt / C (platinum loaded on conductive carbon black) catalyst The sheet is the hydrogen evolution electrode, the 5Mol / L KOH aqueous solution is the electrolyte, and the electrolyte submerges most of the electrodes.

[0050] The effective area of ​​the electrode of this single battery is 5 square centimeters.

[0051] Constant current charging: connect the zinc electrode to the negative p...

Embodiment 2

[0054] Take 2.5 grams of mercury-free zinc powder, 7.5 grams of zinc oxide, and 3 milliliters of 3% polyvinyl alcohol aqueous solution and mix thoroughly to form a slurry, coat it on the foamed nickel, after drying, press it into a zinc electrode, and use the PPAT-AS-SL8 film as a battery Diaphragm, foamed nickel sheet is the hydrogen and oxygen evolution electrode, 0.5Mol / L NaOH aqueous solution is the electrolyte, and the electrolyte submerges most of the electrodes. The effective area of ​​the electrode of a single battery is 10 square centimeters.

[0055] Constant current charging: connect the zinc electrode to the negative pole, and the foamed nickel sheet to the positive pole, with a current of 60 mA, charge for 5 hours, and let it stand for 15 minutes after charging. The positive electrode emits gas during charging, and the two electrodes do not produce gas when left standing.

[0056] Discharge gas production: the zinc electrode is the negative electrode, and the nic...

Embodiment 3

[0059] Get 0.5 grams of conductive carbon black, 7 grams of zinc oxide, 1.5 grams of mercury-free zinc powder, 3.3 milliliters of polyvinyl alcohol 3% aqueous solution, 25 milliliters of sodium carboxymethylcellulose 2 percent aqueous solution, and 4 milliliters of polytetrafluoroethylene (PTFE) emulsion (10% mass concentration), stir evenly, heat to form a ball, and roll to form a sheet. Zinc electrode pressed on 60 mesh brass mesh, PPAT-AS-SL8 membrane as diaphragm, nickel foam as hydrogen and oxygen evolution electrode, 5Mol / L KOH aqueous solution as electrolyte, electrolyte submerges most of the electrodes.

[0060] The effective area of ​​the electrode of this single battery is 12 square centimeters.

[0061] Constant current charging: connect the zinc electrode to the negative pole, and the nickel foam sheet to the positive pole, with a current of 100 mA, charge for 5 hours, and let it stand for 15 minutes after charging. The positive electrode emits gas during charging...

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PUM

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Abstract

A method for producing and storing hydrogen by electrochemical zinc-water is carried out by connecting electrode and zinc electrode external circuit when releasing hydrogen, water reduction reacting on electrode, releasing hydrogen, zinc oxidation reacting on zinc electrode, generating zinc oxide, supplementing water to enclosed system, connecting power supply negative electrode onto zinc electrode external circuit, connecting power supply positive electrode onto electrode external circuit, inducing DC, zinc reduction reacting on zinc electrode, reducing zinc oxide into zinc, restoring zinc electrode, oxidation reacting, generating oxygen and discharging. It is an enclosed system consisted of electrode electrolyte and zinc electrode, electrode and zinc are connected with external circuit. It is simple and can be used to provide hydrogen source and generation.

Description

1. Technical field [0001] The invention belongs to hydrogen energy storage and manufacturing technology, in particular to a method for electrochemical zinc-water hydrogen production and hydrogen storage. 2. Background technology [0002] With the gradual increase in consumption of fossil fuels and the gradual depletion of their reserves, as well as the increasing emphasis on environmental protection, the primary energy represented by oil, coal, and natural gas will eventually be replaced by solar energy, wind energy, ocean energy, bioenergy, etc. replaced by clean and renewable energy. Hydrogen energy, as a non-polluting secondary energy source, has many outstanding advantages such as abundant resources, large combustion heat mass, and the combustion product is water, which will not cause environmental pollution, and has been widely valued by countries all over the world. In particular, the hydrogen-oxygen (air) fuel cell that uses hydrogen as fuel, which has emerged in rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/00C25B1/02H01M8/20
CPCC01B3/0026C01B3/0031C25B1/02C25B5/00H01M8/065H01M8/0656H01M16/003H01M2250/402Y02B90/10Y02E60/32Y02E60/36Y02E60/50
Inventor 黄潮
Owner 黄潮
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