Carbon-based reverse spinel type copper ferrite fuel cell cathode material constructed by taking collagenous fiber/nanofiber composite aerogel as template

A fuel cell cathode and composite airgel technology, applied in battery electrodes, nanotechnology, nanotechnology, etc., can solve the problems of single synthesis cost, toxicity, and high cost of Pt-based catalytic materials of precursors, and achieve excellent limiting current, Good electrical conductivity, the effect of maintaining the integrity of the shape

Active Publication Date: 2021-09-21
FUZHOU UNIVERSITY
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Problems solved by technology

[0005] Aiming at the problems of single precursor and high synthesis cost of current fuel cell catalysts, as well as the defects of high cost and toxicity of Pt-based catalytic materials, the present invention proposes a carbon fiber / nanofiber composite airgel as a template to construct carbon Inverse spinel-based copper ferrite fuel cell cathode material and preparation method thereof, which have high initial potential, half-slope potential, excellent limiting current, good stability and good methanol tolerance, and have good application value

Method used

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  • Carbon-based reverse spinel type copper ferrite fuel cell cathode material constructed by taking collagenous fiber/nanofiber composite aerogel as template
  • Carbon-based reverse spinel type copper ferrite fuel cell cathode material constructed by taking collagenous fiber/nanofiber composite aerogel as template
  • Carbon-based reverse spinel type copper ferrite fuel cell cathode material constructed by taking collagenous fiber/nanofiber composite aerogel as template

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preparation example Construction

[0036] A kind of collagen fiber / nano fiber composite airgel is used as template to construct carbon-based inverse spinel type copper ferrite fuel cell cathode material, and its preparation method comprises the following steps:

[0037] (1) Weigh the cotton in a three-neck round bottom flask, add concentrated sulfuric acid (98wt%) and deionized water, stir in the water bath at a constant speed, and after a period of reaction in the water bath, add deionized water to dilute the sulfuric acid to terminate the hydrolysis reaction. Remove the supernatant after placing it, and then centrifuge the suspension at high speed for several times until the supernatant becomes turbid, collect the turbid solution, put it into a dialysis bag (MD44-14000) and dialyze until the solution is neutral, and obtain nanofiber crystals (CNC) solution;

[0038] (2) Dissolve white skin powder in a mixed solution containing NaOH and NaCl, and vibrate in a water bath to obtain a collagen fiber solution;

...

Embodiment

[0053] (1) Weigh 3g of cotton into a three-neck round bottom flask, add 13mL of concentrated sulfuric acid (98%) and 13mL of deionized water, stir at a constant speed in a 45°C water bath for 1.5h, then add 50mL of deionized water to dilute sulfuric acid to terminate For hydrolysis reaction, remove the supernatant after standing still, and then centrifuge the lower layer suspension in a high-speed centrifuge at 10,000rpm / min, 10min / time, until the supernatant becomes turbid, collect the turbid solution, and put it into a dialysis bag (MD44- 14000) was dialyzed until the solution was neutral and collected for later use to obtain a 0.01wt% nanofiber crystal (CNC) solution;

[0054] (2) Dissolve 1 g of white skin powder in 50 mL of a mixed solution containing NaOH and NaCl, and shake in a water bath at 30 °C for 24 hours to obtain a collagen fiber solution; the mixed solution used consists of 25 mL of 0.1 mol / L NaOH solution and 25 mL of 2 mol / L NaOH solution L mixed with NaCl so...

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Abstract

The invention discloses a preparation method for constructing a carbon-based reverse spinel type copper ferrite fuel cell cathode material by taking collagenous fiber / nanofiber composite aerogel as a template. The preparation method comprises the following steps of: preparing the collagenous fiber / nanofiber composite aerogel from biomass materials cotton and white skin powder; and on the basis of a unique three-dimensional pore structure of the collagenous fiber / nanofiber composite aerogel, synthesizing a reverse spinel type copper ferrite nanocomposite CCF-NCA coated CuFe2O4 in situ. The composite material synthesized by adopting the method has the advantages of high yield, uniform morphology, large specific surface area, high potential, excellent limiting current, better stability, methanol tolerance and the like, can solve the problems of single precursor, high cost and the like of the existing fuel cell catalyst, can be used as a high-efficiency electrocatalyst for replacing the traditional commercial Pt / C, and has great potential application value.

Description

technical field [0001] The invention belongs to the technical field of proton membrane fuel cell catalysts, and in particular relates to a carbon-based inverse spinel type copper ferrite fuel cell cathode material constructed with collagen fiber / nano fiber composite airgel as a template. Background technique [0002] Proton membrane fuel cell (PEMFC) has the characteristics of high specific energy, low temperature fast start, convenient operation, high smooth operation and green environmental protection, etc. It is considered to be an ideal source of power to replace internal combustion engines, and is used in national defense, aerospace, communications, portable power, New energy vehicles and other aspects have received extensive attention from scholars. At present, PEMFC still faces problems such as high cost and short lifespan, which lead to the inability to achieve wide application and limit the further development of PEMFC in the process of industrialization. In order ...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/90B82Y30/00B82Y40/00
CPCH01M4/8647H01M4/8663H01M4/8673H01M4/9016H01M4/9083B82Y40/00B82Y30/00Y02E60/50
Inventor 肖高林依婷
Owner FUZHOU UNIVERSITY
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