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Devices incorporating novel cathode systems and methods of using same to generate electrical energy

A cathode, electric energy technology, used in biochemical fuel cells, regenerative fuel cells, etc.

Inactive Publication Date: 2011-12-14
W&F TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second loss occurs due to the fact that oxygen permeates through the proton conducting material which forms the separator between the anode and cathode compartments

Method used

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  • Devices incorporating novel cathode systems and methods of using same to generate electrical energy
  • Devices incorporating novel cathode systems and methods of using same to generate electrical energy
  • Devices incorporating novel cathode systems and methods of using same to generate electrical energy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment I

[0084] A flat microbial fuel cell was assembled from 6 plates with dimensions of 28.0 x 28.0 x 1.2 / 1.5 cm, which were bolted together. The four middle plates contain the channels. bipolar membrane ( FuMA-tech GfmbH, St. Ingbert, Germany) was placed between two intermediate plates. Both cathode and anode have channels with a volume of 0.6751. The electrodes are formed from graphite felt with dimensions 21.9cm x 21.9cm (thickness: 3mm - FMI Composites Ltd., Galashiels, Scotland) with a 480cm 2 The total area of ​​and 675 / 2.7 = 250cm 2 The effective area of ​​the reactor volume divided by the channel depth.

[0085] Cathode and anode electrodes lead from the reactor with gold wires and are interconnected by an auto-regulating unit, which adjusts the resistance or voltage.

[0086] The reference electrode was Ag / AgCl, 3M KCl electrode (ProSense Qis, Oosterhout, Netherlands). The cathodic solution was allowed to flow for 121 h through an open bottle for oxygen supply -1 The...

Embodiment II

[0094] Acidophilus ferrooxidans was cultivated in a medium with the following composition: 0.4g / lKH 2 PO 4 , 0.4g / l MgSO 4 x 7H 2 O, 0.4g / l (NH 4 ) 2 SO 4 , 33.3g / l FeSO 4 wxya 2 O, 0.1N H 2 SO 4 , pH=2.5. Growth takes place in a batch reactor with constant aeration. Fe(III) and Fe(II) concentrations were determined with the Hach Lange test (LCK 320) at the beginning of the cultivation and during the cultivation. in Fe 2+ completely converted to Fe 3+ Afterwards, the cathode compartment of the microbial fuel cell described in Example 1 (pH 6 for the anode compartment) was filled with this culture medium. Available at Fe 3+ Such a fuel cell operates with only a 15% reduction in the amount present. In the absence of acidophilus Thiobacillus ferrooxidans, a large amount of Fe after 4 days 3+ complete conversion at the cathode. Thus, Acidophilus ferrooxidans regenerates Fe at the cathode 3+ .

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Abstract

A first embodiment is disclosed, relating to a device including an anode and a cathode. The anode and cathode are placed in a separate anode and cathode compartment. In at least one embodiment of the device, electron transfer takes place from the cathode to a terminal electron acceptor via a redox mediator. In at least one embodiment, the redox mediator includes the Fe (II) / Fe (III) redox couple. According to a further aspect, of at least one embodiment of the invention, relates to a method for generating electric energy with use of the device according to at least one embodiment of the invention.

Description

technical field [0001] According to a first aspect, the invention relates to a device having an anode at which an oxidation reaction can take place and a cathode at which a reduction reaction can take place. Such a device may be, for example, a fuel cell that may be used to generate electrical energy. [0002] According to another aspect, the invention relates to a method for generating electrical energy, in which a device according to the invention is used. Background technique [0003] Fuel cells that can be used to generate electrical energy are known in the art. In such a fuel cell, for example by hydrogen (H 2 ) and oxygen (O 2 ) to generate electricity through electrochemical combustion. The reactions that can occur are as follows: [0004] (1) Oxidation at the anode: [0005] h 2 →2H + +2e - or [0006] h 2 +20H - →2H 2 O+2e - [0007] (2) Reduction at the cathode [0008] 1 / 2 o 2 +2H + +2e - →H 2 O or [0009] 1 / 2 o 2 +2H 2 O+2e - →2HO - or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/16
CPCY02E60/528Y02E60/527H01M8/18H01M8/16Y02E60/50
Inventor A·特尔海金H·V·M·汉姆勒斯C·J·N·布斯曼
Owner W&F TECH BV