Carbon-based inverse spinel copper ferrite fuel cell cathode material constructed with collagen fiber/nanofiber composite airgel as a template

A fuel cell cathode and composite airgel technology, which is 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 and the effect of maintaining the integrity of the shape

Active Publication Date: 2022-06-03
FUZHOU UNIV
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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 inverse spinel copper ferrite fuel cell cathode material constructed with collagen fiber/nanofiber composite airgel as a template
  • Carbon-based inverse spinel copper ferrite fuel cell cathode material constructed with collagen fiber/nanofiber composite airgel as a template
  • Carbon-based inverse spinel copper ferrite fuel cell cathode material constructed with collagen fiber/nanofiber composite airgel as a template

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preparation example Construction

[0036] A carbon-based inverse spinel copper ferrite fuel cell cathode material is constructed by using collagen fiber / nanofiber composite aerogel as a template, and the preparation method thereof comprises the following steps:

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

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

[0039] (3) Mix and st...

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, and then add 50mL of deionized water to dilute sulfuric acid to stop Hydrolysis reaction, after standing, remove the supernatant, then centrifuge the lower layer suspension at 10000rpm / min in a high-speed centrifuge, 10min / time, until the supernatant becomes turbid, collect the turbid solution, and put it in a dialysis bag (MD44- 14000) 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 it in a water bath at 30 °C for 24 h to prepare a collagen fiber solution; the mixed solution used consists of 25 mL, 0.1 mol / L NaOH solution and 25 mL, 2 mol / L of NaCl solution mixed;

[0055] (3) Take 50 mL of nanofiber crystal solution and 50 mL of collagen fiber solution, mix and s...

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Abstract

The invention discloses a preparation method for constructing a carbon-based inverse spinel type copper ferrite fuel cell cathode material using collagen fiber / nano fiber composite airgel as a template, which is prepared by utilizing biomass materials cotton and white bark powder Collagen fiber / nanofiber composite airgel, and based on the unique three-dimensional pore structure of collagen fiber / nanofiber composite airgel, in situ synthesis of inverse spinel copper ferrite nanocomposite C CF‑NCA @CuFe 2 o 4 . The composite material synthesized by the invention has the advantages of high output, uniform appearance, large specific surface area, high potential, excellent limiting current, good stability and methanol tolerance, etc., which can solve the problems existing in existing fuel cell catalysts Due to the problems of single precursor and high cost, it can be used as a high-efficiency electrocatalyst to replace 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, in particular to a carbon-based inverse spinel type copper ferrite fuel cell cathode material constructed by using collagen fiber / nanofiber composite aerogel as a template. Background technique [0002] Proton Membrane Fuel Cell (PEMFC) has the characteristics of high specific energy, quick start at low temperature, convenient operation, high smooth operation and green environmental protection. New energy vehicles and other aspects have received extensive attention from scholars. At present, PEMFC is still faced with problems such as high cost and short life, which makes it impossible to achieve wide application, which limits the further development of PEMFC in the process of industrialization. In order to improve the performance of PEMFC and reduce the cost of catalysts, more and more researches focus on carbon-based materials. A large number of studies have shown th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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 UNIV
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