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Proton conductor material, preparation method and application thereof, and intermediate temperature fuel cell

A proton conductor, fuel cell technology, applied in fuel cells, chemical instruments and methods, circuits, etc.

Active Publication Date: 2017-06-23
BEIJING INST OF NANOENERGY & NANOSYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Currently, fuel cells or sensors based on proton conductors operating at high temperatures mainly use ceramic conductors BaZr 0.8 Y 0.2 o 3-δ (BZY) and BaCe 0.7 Zr 0.1 Y 0.2 o 3-δ (BCZY), while fuel cells working at low temperatures mainly use polymer electrolytes produced by DuPont of the United States It is rare to see reports of proton conductor electrolyte materials that can work in the medium temperature range (150-400°C) and have excellent performance

Method used

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  • Proton conductor material, preparation method and application thereof, and intermediate temperature fuel cell

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preparation example Construction

[0029] In the method for preparing a proton conductor material described in the second aspect of the present invention, the chemical formula of the proton conductor material is preferably the same as that of the proton conductor material described in the aforementioned first aspect, and the present invention no longer treats protons in the second aspect The preferred conditions of the conductor material will be described in detail, which should not be understood by those skilled in the art as limiting the present invention.

[0030] Preferably, in step (1), the roasting conditions include: the temperature is 250-600° C., and the time is 4-30 hours.

[0031] The oxide of A in the present invention means a binary compound formed by metal A element and oxygen, and the oxide of B means a binary compound formed by metal B element and oxygen.

[0032] The oxide of A is preferably Y 2 o 3 、TiO 2 , Nb 2 o 5 、 Ta 2 o 5 、MoO 2 and WO 3 .

[0033] The oxide of B is preferably A...

Embodiment 1

[0049] Embodiment 1: preparation (NH 4 ) 2 Mo 0.8 Ge 0.2 P 4 o 13

[0050] According to the stoichiometric ratio, ammonium polyphosphate, MoO 2 and GeO 2 The powders were thoroughly mixed with a mortar and calcined at 450°C for 10h in an ammonia atmosphere. Then the ammonia gas was switched to argon, and the temperature was lowered to 25°C at a cooling rate of 5°C / min. Utilize X-ray diffractometer and neutron diffraction (25 DEG C, the same below) to characterize the phase of product, know from XRD pattern, product (NH 4 ) 2 Mo 0.8 Ge 0.2 P 4 o 13 is a pure triclinic phase, space group:

[0051] According to the results of neutron diffraction, the product (NH 4 ) 2 Mo 0.8 Ge 0.2 P 4 o 13 tetraphosphate unit cells (P 4 o 13 6- ) are arranged along the [011] direction, and four tetraphosphate units are bonded with Mo / Ge atoms to form an octahedral structure, forming a [(Mo 0.8 Ge 0.2 )P 4 o 13 2- ] n layer, these [(Mo 0.8 Ge 0.2 )P 4 o 13 2- ]...

Embodiment 2

[0055] Embodiment 2: preparation (NH 4 ) 2 W 0.76 Ge 0.24 P 4 o 13

[0056] According to the stoichiometric ratio, ammonium polyphosphate, WO 3 and GeO 2 The powders were thoroughly mixed with a mortar and calcined at 400°C for 15h in an ammonia atmosphere. Then the ammonia gas was switched to argon, and the temperature was lowered to 30°C at a cooling rate of 10°C / min. Utilize X-ray diffractometer and neutron diffraction to characterize the phase of product, know from XRD pattern, product (NH 4 ) 2 W 0.76 Ge 0.24 P 4 o 13 is a pure triclinic phase, space group:

[0057] The neutron diffraction results are similar to those in Example 1.

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Abstract

The invention relates to the field of a fuel cell electrolyte and discloses a proton conductor material, a preparation method and application thereof, and an intermediate temperature fuel cell. The chemical formula of the proton conductor material is (NH4)2A1-xBxP4O13, wherein A is one, two or more than two elements of Y, Ti, Nb, Ta, Mo and W; B is one, two or more than two elements of Al, In, Si, Ge and Sn; and x is greater than or equal to 0 and less than or equal to 0.4. When the proton conductor material provided by the invention works in an intermediate temperature (150 to 400 DEG C) range, the proton conductivity is obviously higher than 4*10<-2>S / cm, and application of the proton conductor material to the intermediate temperature fuel cell can be realized.

Description

technical field [0001] The invention relates to the field of fuel cell electrolytes, in particular to a proton conductor material, a method for preparing the proton conductor material, the proton conductor material prepared by the method, and the proton conductor material used as an electrolyte material for a medium-temperature proton conductor fuel cell or an electrolytic cell The application of proton conductor materials in sensors and a medium temperature fuel cell. Background technique [0002] In recent years, due to the advantages of high energy conversion efficiency and low emission, fuel cells have attracted worldwide attention. In particular, in 2014 several car companies including Toyota of Japan brought fuel cell vehicles to the market. [0003] However, the existing polymer electrolyte membrane fuel cells (PEMFCs) generally use proton conductors As an electrolyte, this type of fuel cell must operate at temperatures below the boiling point of water (100°C). Wo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1016C01B25/45
CPCC01B25/451H01M8/1016H01M2300/0068H01M2300/0085Y02E60/50
Inventor 孙春文
Owner BEIJING INST OF NANOENERGY & NANOSYST
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