CN106299387A - Utilize the method that straw prepares Proton Exchange Membrane Fuel Cells gas-diffusion electrode - Google Patents

Utilize the method that straw prepares Proton Exchange Membrane Fuel Cells gas-diffusion electrode Download PDF

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CN106299387A
CN106299387A CN201610893214.5A CN201610893214A CN106299387A CN 106299387 A CN106299387 A CN 106299387A CN 201610893214 A CN201610893214 A CN 201610893214A CN 106299387 A CN106299387 A CN 106299387A
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straw
gas
diffusion electrode
exchange membrane
fuel cells
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CN106299387B (en
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徐峰
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Fuzhou University
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Fuzhou University
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/86Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88Processes of manufacture
    • H01M4/8803Supports for the deposition of the catalytic active composition
    • H01M4/8807Gas diffusion layers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/50Fuel cells

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inert Electrodes (AREA)

Abstract

The invention discloses a kind of method utilizing straw to prepare Proton Exchange Membrane Fuel Cells gas-diffusion electrode; with straw as raw material; after the precursor solution of ferrum impregnates and dries; use pressure sintering in protective gas atmosphere once property fabricated in situ contain the gas-diffusion electrode of Fe N C non-platinum catalyst; the inventive method is implemented reliable; cost-effective, and can be by the utilization of the value maximization of straw, it is to avoid unnecessary waste.

Description

Utilize the method that straw prepares Proton Exchange Membrane Fuel Cells gas-diffusion electrode
Technical field
The present invention relates to fuel cell electrode field, especially one utilizes straw to prepare Proton Exchange Membrane Fuel Cells gas The method of bulk diffusion electrode.
Background technology
Proton Exchange Membrane Fuel Cells has the advantages such as the high and low pollution of efficiency, is therefore considered as preferable energy conversion One of mode.In recent decades, Proton Exchange Membrane Fuel Cells is paid high attention to by government, enterprise and scientific research institution, obtains Great development, but Proton Exchange Membrane Fuel Cells is mainly using noble metal platinum and platinum base alloy as catalyst, and platinum is high Price significantly limit the commercialization of Proton Exchange Membrane Fuel Cells, non-platinum catalyst and the gas containing non-platinum catalyst The research of diffusion electrode is risen.
Research in recent years finds, containing ferrum (Fe), nitrogen (N), the catalyst of carbon (C) three kinds of elements shows can be with platinum Oxygen reduction reaction (ORR) activity that catalyst compares favourably, makes non-platinum catalyst and the diffusion of the gas containing non-platinum catalyst It is expected to replace platinum after electrode and is applied to fuel battery cathode with proton exchange film gas-diffusion electrode.
China is a large agricultural country, and the substantial amounts of straw of annual generation, along with the development of economic society, rural area is fewer and feweri Ground use straw is as life fuel, and selects the mode of on-site incineration compost to process straw, and this not only brings great ring Border is endangered, and also makes the value of stalk resource not be fully utilized.Owing to straw containing abundant C, N, H, O element (accounting for the 75% of straw gross mass), the Organic substance fiber such as these elementary composition cellulose, hemicellulose, lignins is straw Main component, therefore will can be used conveniently to prepare the non-platinum gas-diffusion electrode of Proton Exchange Membrane Fuel Cells after straw-carbonized.
Summary of the invention
In order to solve the deficiencies in the prior art, the present invention provides that a kind of preparation cost is low, method is simple and workable Utilize the method that straw prepares Proton Exchange Membrane Fuel Cells gas-diffusion electrode.
In order to realize above-mentioned technical purpose, the technical scheme is that one utilizes straw to prepare PEM The method of fuel cell gas diffusion electrode, its process is: with straw as raw material, and the precursor solution through ferrum impregnates and dries After, use the gas diffusion electricity that once property fabricated in situ contains Fe-N-C non-platinum catalyst to pressure sintering in protective gas atmosphere Pole.
Further, it specifically includes following steps:
(1) straw is cut into a length of 5~10cm, width be 0.1~1cm straw billet;
(2) above-mentioned straw billet is made straw net;
(3) being immersed in the precursor solution of ferrum by above-mentioned straw net, the impregnation process time is 10~90min;
(4) the straw net being disposed taking-up is dried;
(5) take 3~10 layers above-mentioned dry after straw net be overlapped being placed in hot press, simultaneously in hot press, be passed through guarantor Protect gas, make straw net under protective gas atmosphere with 1~5Mpa pressure, carry out at a temperature of 200~500 DEG C hot pressing 15~ 120min, i.e. can obtain the gas-diffusion electrode containing Fe-N-C non-platinum catalyst after compacting.
Further, described straw include wheat stalk, rice straw, corn straw, Caulis Sacchari sinensis stem and leaf, cotton stalk, One or more in rape stalk, Rhizoma Dioscoreae esculentae rattan, potato vine.
Further, the concentration of the precursor solution of described ferrum is 0.01~5mol/L.
Further, the precursor solution of described ferrum is ferric nitrate, iron chloride, ferric oxalate, ferrocene methanol, ferrocene Formic acid, Iron sulfuret., ammonium ferric oxalate, Ferrox., ethyl dicyclopentadienyl iron, ferric acetyl acetonade, ferric ammonium sulfate, ferrous sulfate Ammonium, diacetyl group ferrocene, benzoyl ferrocene, vinyl ferrocene, normal-butyl ferrocene, trifluoromethanesulfonic acid ferrum, butyryl One or more mixing compositions in base ferrocene.
Further, described protective gas is one or more mixing compositions in nitrogen, argon, helium.
Further, it is braiding or compressing that straw billet is made the method for straw net by described step (2).
By above-mentioned technical scheme, the invention have the benefit that by with straw for preparing raw material, being impregnated in It is taken out again after the precursor solution of ferrum drying, makes the precursor solution of ferrum be supported on straw surface, at the gas of protective gas The straw that debt has under atmosphere the presoma of ferrum carries out hot pressing, makes the presoma of ferrum decompose, and iron atom is tight with straw surface Closely connected conjunction, and meet with carbon, nitrogen element during straw-carbonized, form Fe-N-C non-platinum catalyst, due to hot pressing In journey, straw generation carbonization is also with generation and the diffusion of the gases such as carbon monoxide, and final straw forms perforated grill structure, suitable Diffusion in gaseous oxidant is circulated.
Accompanying drawing explanation
The present invention is further elaborated with detailed description of the invention below in conjunction with the accompanying drawings:
Fig. 1 is that the preparation flow that the present invention prepares Proton Exchange Membrane Fuel Cells non-platinum catalyst gas-diffusion electrode with straw shows It is intended to.
Detailed description of the invention
As it is shown in figure 1, the inventive method is with straw as raw material, after the precursor solution of ferrum impregnates and dries, use Pressure sintering in protective gas atmosphere once property fabricated in situ contain the gas-diffusion electrode of Fe-N-C non-platinum catalyst.
Further, it specifically includes following steps:
(1) straw is cut into a length of 5~10cm, width be 0.1~1cm straw billet;
(2) above-mentioned straw billet is made straw net;
(3) being immersed in the precursor solution of ferrum by above-mentioned straw net, the impregnation process time is 10~90min;
(4) the straw net being disposed taking-up is dried;
(5) take 3~10 layers above-mentioned dry after straw net be overlapped being placed in hot press, simultaneously in hot press, be passed through guarantor Protect gas, make straw net under protective gas atmosphere with 1~5Mpa pressure, carry out at a temperature of 200~500 DEG C hot pressing 15~ 120min, i.e. can obtain the gas-diffusion electrode containing Fe-N-C non-platinum catalyst after compacting.
Further, described straw include wheat stalk, rice straw, corn straw, Caulis Sacchari sinensis stem and leaf, cotton stalk, One or more in rape stalk, Rhizoma Dioscoreae esculentae rattan, potato vine.
Further, the concentration of the precursor solution of described ferrum is 0.01~5mol/L.
Further, the precursor solution of described ferrum is ferric nitrate, iron chloride, ferric oxalate, ferrocene methanol, ferrocene Formic acid, Iron sulfuret., ammonium ferric oxalate, Ferrox., ethyl dicyclopentadienyl iron, ferric acetyl acetonade, ferric ammonium sulfate, ferrous sulfate Ammonium, diacetyl group ferrocene, benzoyl ferrocene, vinyl ferrocene, normal-butyl ferrocene, trifluoromethanesulfonic acid ferrum, butyryl One or more mixing compositions in base ferrocene.
Further, described protective gas is one or more mixing compositions in nitrogen, argon, helium.
Further, it is braiding or compressing that straw billet is made the method for straw net by described step (2).
Embodiment 1
(1) wheat stalk cuts into a length of 10cm, width is the wheat stalk billet of 1cm;
(2) wheat stalk net is made in above-mentioned wheat stalk billet braiding;
(3) above-mentioned wheat stalk net is immersed in the ammonium ferric oxalate solution that concentration is 3mol/L, impregnation process 70min;
(4) the wheat stalk net processed is taken out from ammonium ferric oxalate solution dry;
(5) take 3 layers above-mentioned dry after wheat stalk net be overlapped being placed in hot press, simultaneously in hot press, be passed through nitrogen Gas, makes wheat stalk net with 3Mpa pressure, carry out hot pressing 100min at a temperature of 300 DEG C under the protective atmosphere of nitrogen, compacting After i.e. can obtain the gas-diffusion electrode containing Fe-N-C non-platinum catalyst.
Embodiment 2
(1) rice straw cuts into a length of 8cm, width is the rice straw billet of 0.5cm;
(2) rice straw net is made in above-mentioned rice straw billet braiding;
(3) above-mentioned rice straw net is immersed in the iron nitrate solution that concentration is 3mol/L, impregnation process 80min;
(4) the rice straw net processed is taken out from ammonium ferric oxalate solution dry;
(5) take 6 layers above-mentioned dry after rice straw net be overlapped being placed in hot press, simultaneously in hot press, be passed through helium Gas, makes rice straw net with 4Mpa pressure, carry out hot pressing 90min at a temperature of 400 DEG C under the protective atmosphere of helium, has suppressed The gas-diffusion electrode containing Fe-N-C non-platinum catalyst i.e. can be obtained after Biing.
Embodiment 3
(1) cotton stalk cuts into a length of 5cm, width is the cotton stalk billet of 0.1cm;
(2) cotton stalk net is made in above-mentioned corn straw billet braiding;
(3) above-mentioned cotton stalk net is immersed in the ammonium ferric oxalate solution that concentration is 1mol/L, impregnation process 90min;
(4) the cotton stalk net processed is taken out from ammonium ferric oxalate solution dry;
(5) take 4 layers above-mentioned dry after cotton stalk net be overlapped being placed in hot press, simultaneously in hot press, be passed through argon Gas, makes cotton stalk net with 5Mpa pressure, carry out hot pressing 50min at a temperature of 460 DEG C under the protective atmosphere of argon, has suppressed The gas-diffusion electrode containing Fe-N-C non-platinum catalyst i.e. can be obtained after Biing.
Embodiment 4
(1) rape stalk cuts into a length of 6cm, width is the rape stalk billet of 0.6cm;
(2) rape stalk net is made in above-mentioned wheat stalk billet braiding;
(3) above-mentioned rape stalk net is immersed in the benzoyl solution of ferrocene that concentration is 0.01mol/L, impregnation process 10min;
(4) the rape stalk net processed is taken out from benzoyl solution of ferrocene dry;
(5) take 10 layers above-mentioned dry after rape stalk net be overlapped being placed in hot press, be passed through in hot press simultaneously Nitrogen and helium volume ratio are the mixed gas of 1:1, make rape stalk net press with 1Mpa under the protective atmosphere of nitrogen and helium Power, carry out hot pressing 120min at a temperature of 200 DEG C, i.e. can obtain the gas containing Fe-N-C non-platinum catalyst after compacting and expand Dissipate electrode.
Embodiment 5
(1) Rhizoma Dioscoreae esculentae rattan straw is cut into a length of 7cm, width is the Rhizoma Dioscoreae esculentae rattan straw billet of 0.7cm;
(2) above-mentioned Rhizoma Dioscoreae esculentae rattan straw billet is made Rhizoma Dioscoreae esculentae rattan straw net;
(3) above-mentioned Rhizoma Dioscoreae esculentae rattan straw net is immersed in the acetylacetone,2,4-pentanedione ferrous solution that concentration is 5mol/L, impregnation process 60min;
(4) the Rhizoma Dioscoreae esculentae rattan straw net processed is taken out from acetylacetone,2,4-pentanedione ferrous solution dry;
(5) take 7 layers above-mentioned dry after Rhizoma Dioscoreae esculentae rattan straw net be overlapped being placed in hot press, be passed through in hot press simultaneously Argon and helium volume ratio are the mixed gas of 1:1, make Rhizoma Dioscoreae esculentae rattan straw net with 2Mpa under the protective atmosphere of argon and helium Pressure, carry out hot pressing 15min at a temperature of 500 DEG C, after compacting, i.e. can obtain the gas containing Fe-N-C non-platinum catalyst Diffusion electrode.
Embodiment 6
(1) wheat stalk and rice straw are cut into a length of 10cm, width is the wheat stalk billet of 1cm;
(2) straw net is made in above-mentioned wheat stalk billet braiding;
(3) above-mentioned straw net is immersed in the ferrocene methanol solution that concentration is 2mol/L, impregnation process 30min;
(4) the straw net processed is taken out from ferrocene methanol solution dry;
(5) take 8 layers above-mentioned dry after wheat stalk net be overlapped being placed in hot press, simultaneously in hot press, be passed through nitrogen Gas, makes wheat stalk net with 1.5Mpa pressure, carry out hot pressing 60min at a temperature of 480 DEG C under the protective atmosphere of nitrogen, compacting After i.e. can obtain the gas-diffusion electrode containing Fe-N-C non-platinum catalyst.
The foregoing is only presently preferred embodiments of the present invention, for the ordinary skill in the art, without departing from In the case of the principle of the present invention and spirit, all equalizations made according to scope of the present invention patent change, revise, replace and become Type, all should belong to the covering scope of the present invention.

Claims (7)

1. one kind utilizes the method that straw prepares Proton Exchange Membrane Fuel Cells gas-diffusion electrode, it is characterised in that: with straw For raw material, after the precursor solution of ferrum impregnates and dries, use pressure sintering once property conjunction in situ in protective gas atmosphere Become the gas-diffusion electrode containing Fe-N-C non-platinum catalyst.
The method utilizing straw to prepare Proton Exchange Membrane Fuel Cells gas-diffusion electrode the most according to claim 1, its It is characterised by: specifically include following steps:
(1) straw is cut into a length of 5~10cm, width be 0.1~1cm straw billet;
(2) above-mentioned straw billet is made straw net;
(3) being immersed in the precursor solution of ferrum by above-mentioned straw net, the impregnation process time is 10~90min;
(4) the straw net being disposed taking-up is dried;
(5) take 3~10 layers above-mentioned dry after straw net be overlapped being placed in hot press, simultaneously in hot press, be passed through guarantor Protect gas, make straw net under protective gas atmosphere with 1~5Mpa pressure, carry out at a temperature of 200~500 DEG C hot pressing 15~ 120min, i.e. can obtain the gas-diffusion electrode containing Fe-N-C non-platinum catalyst after compacting.
The method utilizing straw to prepare Proton Exchange Membrane Fuel Cells gas-diffusion electrode the most according to claim 1 and 2, It is characterized in that: described straw includes wheat stalk, rice straw, corn straw, Caulis Sacchari sinensis stem and leaf, cotton stalk, Brassica campestris L straw One or more in stalk, Rhizoma Dioscoreae esculentae rattan, potato vine.
The method utilizing straw to prepare Proton Exchange Membrane Fuel Cells gas-diffusion electrode the most according to claim 1 and 2, It is characterized in that: the concentration of the precursor solution of described ferrum is 0.01~5mol/L.
The method utilizing straw to prepare Proton Exchange Membrane Fuel Cells gas-diffusion electrode the most according to claim 1 and 2, It is characterized in that: the precursor solution of described ferrum be ferric nitrate, iron chloride, ferric oxalate, ferrocene methanol, ferrocenecarboxylic acid, Iron sulfuret., ammonium ferric oxalate, Ferrox., ethyl dicyclopentadienyl iron, ferric acetyl acetonade, ferric ammonium sulfate, Ferrous ammonium sulfate, double second Acyl Ferrocene, benzoyl ferrocene, vinyl ferrocene, normal-butyl ferrocene, trifluoromethanesulfonic acid ferrum, Butyrylferrocene In one or more mixing composition.
The method utilizing straw to prepare Proton Exchange Membrane Fuel Cells gas-diffusion electrode the most according to claim 1 and 2, It is characterized in that: described protective gas is one or more mixing compositions in nitrogen, argon, helium.
The method utilizing straw to prepare Proton Exchange Membrane Fuel Cells gas-diffusion electrode the most according to claim 2, its It is characterised by: it is braiding or compressing that straw billet is made the method for straw net by described step (2).
CN201610893214.5A 2016-10-13 2016-10-13 The method for preparing Proton Exchange Membrane Fuel Cells gas-diffusion electrode using stalk Expired - Fee Related CN106299387B (en)

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CN107039668A (en) * 2017-03-31 2017-08-11 武汉理工大学 A kind of gas diffusion layer of proton exchange membrane fuel cell durability accelerated test method
CN109585863A (en) * 2018-12-14 2019-04-05 广东工业大学 A kind of preparation method of gas diffusion layer of proton exchange membrane fuel cell
CN111682227A (en) * 2020-07-06 2020-09-18 山东交通学院 Preparation method of diffusion layer for fuel cell
CN111682228A (en) * 2020-07-06 2020-09-18 山东交通学院 Preparation method of diffusion layer with catalysis promoting function

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CN111682228A (en) * 2020-07-06 2020-09-18 山东交通学院 Preparation method of diffusion layer with catalysis promoting function

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