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A thermoelectric battery

A technology of thermoelectric battery and membrane electrode, which is applied in the direction of fuel cells, circuits, electrical components, etc., can solve the problems that battery performance is easily affected by concentration polarization, slow mass transfer, etc. Good battery performance

Active Publication Date: 2016-02-03
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The electrolyte used in traditional thermoelectric batteries is a liquid electrolyte; the mass transfer of reactants in the solution is slow, and the battery performance is easily affected by concentration polarization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The gas diffusion layer used is TGP-060. It is coated with 0.6mg / cm2 Carbon powder, PTFE mixture, wherein the mass fraction of PTFE is 30%. The catalyst slurry is then knife-coated over it. The slurry is composed of Pt / C (60% wt. JM Company), Nafion solution with a concentration of 5%, and ethanol; the mass ratio of Nafion, Pt / C, and ethanol is 1:4:20. In this embodiment, the first catalytic layer and the second catalytic layer are the same, and both use the electrodes prepared above.

[0044] The two electrodes prepared above were respectively placed on both sides of the Nafion-115 membrane, and hot-pressed at 120°C and 2,000 pounds of pressure for one minute to form an integrated membrane electrode with a diffusion layer. The size of the electrodes used in this embodiment is 2cm×2cm.

[0045] The above-mentioned integrated membrane electrode and the first and second stainless steel pole plates with point-like flow field (at this time, the pole plate is used as the ...

Embodiment 2

[0048] The electrode preparation and cell assembly are the same as in Example 1.

[0049] A layer of heat-conducting silicone grease is coated on the first pole plate 4 of the thermoelectric battery, and a solar photothermal plate is placed on it. The thermoelectric cell equipped with the photothermal plate is placed under the sunlight, wherein the photothermal plate faces the sun. Connect the positive pole of the Arbin electronic load to the current-collecting point on the first plate, and connect the negative pole to the current-collecting point on the second plate to conduct a discharge test. The battery performance curves at different currents are as follows: image 3 .

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Abstract

The invention discloses a thermoelectric cell. The thermoelectric cell comprises a solid electrolyte membrane, membrane electrodes, a first current collection unit and a second current collection unit. The membrane electrodes are respectively located at two sides of the solid electrolyte membrane and each one of the membrane electrodes comprises a first catalysis layer and a second catalysis layer. A temperature of the first catalysis layer side of the membrane electrode is higher than that of the second catalysis layer side of the membrane electrode. The membrane electrodes are arranged in a space environment rich in H2, or are arranged in a sealed environment rich in H2. The first current collection unit and the second current collection unit are respectively located at the two sides of the membrane electrodes and closely fit the membrane electrodes. The first current collection unit and the second current collection unit are respectively provided with first current collection points and second current collection points, and the first current collection points and the second current collection points are connected to external load. In cell working, a first catalysis layer side temperature is high and a second catalysis layer side temperature is low and thus an electrochemical potential difference of the two sides is produced so that H2 undergoes an electrochemical oxidation reaction at one side and an electrochemical reduction reaction is produced at the other side and H2 net consumption is avoided in the whole cell.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric power generation, and in particular relates to a thermoelectric battery based on a solid electrolyte, which can directly convert heat energy into electric energy. Background technique [0002] The increasing demand for energy and the rising price of fossil energy force people to seek new technologies to 1) improve energy efficiency and 2) develop renewable energy. Thermoelectric devices can directly convert thermal energy into electrical energy, and have broad application prospects in the two aspects mentioned above. At present, the efficiency of heat engines widely used in various industries is 30-40%, and the remaining energy is dissipated in the environment in the form of heat energy; in addition, many renewable energy sources exist in the form of heat energy, such as solar thermal energy, geothermal energy, etc. If such thermal energy can be utilized, the dependence on fossil energy wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N10/00
CPCH01M8/22H01M2008/1095Y02E60/50
Inventor 孙公权杨林林孙海陈利康秦兵
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI