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Redox flow battery for hydrogen generation

A liquid flow battery and battery technology, applied in the direction of fuel cells, battery electrodes, fuel cell additives, etc., can solve the problems that electrolysis cannot be applied intermittently, and achieve the effect of high storage capacity

Active Publication Date: 2015-01-07
EOS HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the first two methods is the release of CO 2 , while electrolysis cannot be applied intermittently because the nickel electrode degrades rapidly due to open circuit corrosion

Method used

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  • Redox flow battery for hydrogen generation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Example 1: Generation of Hydrogen

[0075] Under anaerobic conditions with magnetic stirring for 1 hour, by containing 1M H 2 SO 4 , 20mM V(II) and 3 mg silica loaded MOS 2 Or purchase the original Mo 2 C powder (SiO 2 :MoS 2 A 2 mL solution with a molar ratio of 10:1) successfully generated hydrogen gas. The atmosphere above the liquid (headspace) was sampled by a gas-tight syringe and injected into the GC. Mo 2 The result of C ( figure 2 ) are shown with the initial presence of N 2 (Peak 22) compared to the obvious presence of H 2 (Peak 21).

Embodiment 2

[0076] Example 2: Oxygen Generation

[0077] The chemical oxidation of water to form oxygen has been clearly observed in the following experimental conditions: 100 mM ceric ammonium nitrate (Ce (IV)) in 1M HNO 3 2 ml solution in 3 mg IrO 2 / SiO 2 reaction in the presence of . The atmosphere was sampled using a gas-tight syringe and injected into the GC. result( Image 6 ) shows the presence of O 2 (peak 61), and the background gas N of the test 2 (Peak 62).

Embodiment 3

[0078] Example 3: Quantification of electrolytes (Dimensioning)

[0079] To produce 1 liter of H under standard conditions 2 and 0.5 L O 2 (i.e. 44.6 mmol H 2 and 22.3 mmol O 2 ), requiring 89.3 mmol of V(II) and Ce(IV). For an arbitrary concentration of 2M, the catholyte and anolyte have a volume of 89.3 ml. Each electrolyte may also contain an acidic supporting electrolyte (such as H 2 SO 4 ) and additives for increasing the solubility and stability of redox species. On a larger scale, in the Skyllas-Kazacos all-vanadium redox flow battery [Rychcik (1988), supra], 80 liters of each electrolyte was used for a 1 kW battery. The open circuit potential was close to 25V (17 cells) and the current obtained was 65A during charging and about 40.5A during discharging.

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Abstract

The present invention combines the storage capacity of redox flow batteries and the production of hydrogen and other products of chemical redox reactions. The redox couple of each electrolyte is chemically regenerated on a specific catalyst bed 11, replacing the discharging processes of the battery, whilst oxidizing or reducing other species present. This allows for the production of hydrogen on the cathodic side, and various useful products on the anodic side, such as oxygen for fuel cell application. The proposed system uses a dual circuit arrangement from which electrolytes 8 may be pumped through the catalyst beds 11 as desired, once they are in their charged state.

Description

technical field [0001] The invention relates to a redox flow battery system for electric energy storage and hydrogen production. Background technique [0002] There is a clear need for new and sustainable electricity production technologies that produce green emissions, negligible waste, are cost-effective, efficient, and suitable for diverse geographical conditions. Technologies like this that have been widely commercialized include photovoltaic panels and wind farms. A major setback to the widespread use of photovoltaic and wind power sources is the variable and unpredictable electricity production due to direct dependence on sunlight or wind. Intermittent energy production hinders supply and demand routines, making it difficult to generate high currents on demand during peak hours. For future "smart grids", it is therefore important to develop new technologies for large-scale energy storage that efficiently utilize renewable energy to fully integrate intermittent and gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/06H01M8/08H01M8/18H01M8/22H01M8/04
CPCH01M8/0606H01M8/08H01M8/0693H01M8/20Y02E60/528H01M8/22H01M8/188H01M8/04208H01M8/18H01M8/0656H01M4/8615H01M4/8631H01M4/96C25B15/08Y02P20/584Y02E60/50C25B1/04C25B1/50C25B1/02
Inventor 韦罗尼克·阿姆斯特茨凯思琳·E·托格希尔赫里斯托斯·康尼宁利斯H·H·吉拉尔特
Owner EOS HLDG
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