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Fuel cell catalyst carrier and preparation method thereof as well as cell electrodes

A catalyst carrier and fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as poor electronic conductivity, achieve the effect of enhancing stability and reducing electrochemical corrosion

Inactive Publication Date: 2018-11-13
DONGGUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem mainly solved by the embodiments of the present invention is to provide a fuel cell catalyst carrier and its preparation method, a fuel cell electrode and a fuel cell catalyst solution preparation method, which aim to solve the problem of poor electronic conductivity of the existing fuel cell catalyst carrier technical problem

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  • Fuel cell catalyst carrier and preparation method thereof as well as cell electrodes
  • Fuel cell catalyst carrier and preparation method thereof as well as cell electrodes
  • Fuel cell catalyst carrier and preparation method thereof as well as cell electrodes

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preparation example Construction

[0035] Embodiments of the present invention also provide a figure 1 The preparation method of the shown fuel cell catalyst carrier, it specifically comprises the following steps:

[0036] Step 11, adding niobium ethoxide into hydrochloric acid, stirring and dissolving, adding titanium oxide, continuing stirring and dissolving to obtain a niobium and titanium precursor solution.

[0037] Step 12, evaporating the precursor solution of niobium and titanium, or adding tantalum butoxide and evaporating, so as to obtain the initially shaped metal impurities.

[0038] Wherein, directly evaporating the precursor solution of niobium and titanium can obtain initially shaped but technical impurities, and the doping element of the single metal impurities is Nb; after adding tantalum butoxide, evaporate , then a preliminarily formed bimetallic dopant is obtained, and the doping elements of the bimetallic dopant are Ta and Nb.

[0039] Step 13, washing and drying the preliminarily formed ...

Embodiment 1-3

[0047] 1. Add 1.05mmol niobium ethoxide (Nb(OC 2 h 5 ) 5 ) into different concentrations of hydrochloric acid (concentration of hydrochloric acid corresponding to embodiment 1 is 0M (mole) / L, concentration of hydrochloric acid corresponding to embodiment 2 is 5M / L, concentration of hydrochloric acid corresponding to embodiment 3 is 12M / L), stirring and dissolving After 15 minutes, 15.30 mmol of isobutoxytitanium (Ti(OCH 2 CH 2 CH 2 CH 3 ) 4 ), continue stirring for 15 minutes, and dissolve to obtain a precursor solution of niobium and titanium.

[0048] 2. Add 244.6mmol of deionized water dropwise to the precursor solution of niobium and titanium, raise the temperature to 120°C, and keep it warm for 20 hours until all the solution evaporates to obtain the preliminary formed monometallic Nb miscellaneous matter.

[0049] 3. After washing the above-mentioned monometallic Nb impurities with deionized water, dry them overnight at 80° C., and finally, transfer the dried prod...

Embodiment 4

[0052] 1. Add 261mol niobium ethanol (Nb(OC 2 h 5 ) 5 ) into 965mmol hydrochloric acid (hydrochloric acid concentration is 12M / L), stirred and dissolved for 15 minutes, then added 7.60mmol titanium isopropoxide (Ti(OCH(CH 3 ) 2 ) 4 ), continue stirring for 15 minutes to form a precursor solution of niobium and titanium.

[0053] 2. Add 0.92mmol tantalum butoxide (Ta(OCH 2 CH 2 CH 2 CH 3 ) 5 ), after the mixed solution continued to stir for 15 minutes, it was heated to 120° C. and kept for 20 hours until all the solution evaporated to obtain preliminary formed bimetallic Nb and Ta impurities.

[0054] 3. Transfer the above-mentioned preliminary formed bimetallic Nb and Ta impurities to a high-temperature furnace, and obtain Ta 0.01 Nb 0.03 Ti 0.96 o 2 Bimetallic dopant.

[0055] 4, the Nb that embodiment 4 obtains 0.06 Ti 0.94 o 2 The phase structure of the metal dopant was determined and characterized respectively, and the XRD results are shown in Fig. 2(b). ...

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Abstract

The invention relates to the technical field of fuel cells, in particular to a fuel cell catalyst carrier and a preparation method thereof as well as electrodes of a fuel cell and a preparation methodof a fuel cell catalyst solution. The fuel cell catalyst carrier comprises a titanium dioxide dopant which contains niobium element. On the one hand, the fuel cell catalyst carrier prepared by the preparation method disclosed by the invention has the advantages that the defect of insufficient conductivity of titanium dioxide or a Nb-doped titanium dioxide carrier material is overcome; on the other hand, the platinum alloy catalyst (PtPd / TaNbTiO2) carried by a TaNbTiO2 material, compared with an existing common catalyst, has higher stability on the electrochemical test conditions for the fuelcells.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell catalyst carrier and a preparation method thereof, an electrode of a fuel cell and a preparation method of a fuel cell catalyst solution. Background technique [0002] Proton Exchange Membrane Fuel Cell (PEMFCs, Proton Exchange Membrane Fuel Cell), as the most advanced fuel cell technology, can effectively convert hydrogen into electricity and apply it to automobiles, distributed power generation equipment and portable electronic applications on a large scale. It has become one of the important strategies in my country's energy application. However, the high cost of platinum in the hydrogen proton exchange membrane fuel cell (the platinum catalyst accounts for nearly 55% of the total cost in the stack) and the slow oxygen reduction reaction (ORR) at the cathode greatly limit the commercialization of PEMFCs. Therefore, for the commercialization of proton exchange me...

Claims

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Application Information

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IPC IPC(8): H01M4/92
CPCH01M4/921H01M4/925Y02E60/50
Inventor 王严杰董阿力德尔图刘丹
Owner DONGGUAN UNIV OF TECH
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