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MOF material, preparation method thereof, proton exchange membrane, preparation method thereof, and fuel cell

A proton exchange membrane and fuel cell technology, applied in fuel cells, fuel cell parts, circuits, etc., can solve the problems of reducing proton conductivity and adverse effects on device performance, so as to improve proton conductivity and stabilize proton transport performance Effect

Active Publication Date: 2021-12-10
深圳氢时代新能源科技有限公司
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  • Abstract
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Problems solved by technology

[0003] However, due to the diffusion mode operation in DMFC, there are large pores in the existing proton exchange membrane, resulting in the easy diffusion of methanol from the anode to the cathode during the oxidation reaction, because methanol is oxidized at the cathode, which can make the electrocatalyst in the oxygen reduction reaction , so, this anode-to-cathode crossover adversely affects the performance of the device
[0004] One way to solve the above problems is to add fillers in the polymer matrix to reduce the pores. Currently available fillers include carbon nanostructures, clays, zeolites, and metal oxides. However, the addition of the above fillers will reduce proton conduction. Therefore, the development of a proton exchange membrane that can improve proton conductivity and avoid the crossing of liquid methanol from anode to cathode is crucial for better performance of DMFC

Method used

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  • MOF material, preparation method thereof, proton exchange membrane, preparation method thereof, and fuel cell
  • MOF material, preparation method thereof, proton exchange membrane, preparation method thereof, and fuel cell
  • MOF material, preparation method thereof, proton exchange membrane, preparation method thereof, and fuel cell

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preparation example Construction

[0043] The present invention also provides a preparation method for the above-mentioned MOF material, mainly using a solvothermal method, specifically comprising the following steps:

[0044] Step 1: Mix metal cobalt salt, norhalamine and methyl-(5-methyl-isoxazol-3-yl)-amine in a solvent to obtain a mixed solution.

[0045] In a practicable embodiment, the solvent is water, and the metal cobalt salt is a water-soluble metal cobalt salt, that is, cobalt ions can be formed in an aqueous solution, and the mixed solution is adjusted to be alkaline, so that the metal cobalt ions can form hydroxide substances, involved in solvothermal reactions.

[0046] Specifically, in this embodiment, the metal cobalt salt is CoCl 2 , the pH value of the mixed solution is 8-10, specifically, it can be 8, 9 or 10, and the pH of the mixed solution can be adjusted with an alkaline solution, such as NaOH, KOH or ammonia water.

[0047] Step 2: placing the mixed solution in a closed space for solvo...

Embodiment 1

[0063] 1) Take 0.4mmol CoCl 2 , 0.1 mmol A and 0.4 mmol B were dispersed in 40 ml of distilled water, stirred thoroughly at ambient temperature for 3 hours, and the pH value was adjusted to 8.5 with NaOH aqueous solution to obtain a suspension.

[0064] 2) the suspension is sealed in a 50ml stainless steel reaction vessel lined with polytetrafluoroethylene, heated in a 430K oven to carry out solvothermal reaction, the reaction is carried out for 5 days under autogenous pressure and static conditions, and then the container is placed in the oven with Cooling slowly at 5K per hour to 298K, and then turning on, collected the MOF material as yellow crystals.

[0065] 3) The yellow crystals were vacuum-dried in a vacuum oven at 90°C for 24 hours to obtain a white solid, which was the final MOF material.

[0066] 4) Mix 1g of PSS powder (Mw=50,000g / mol, Mn=14000, IEC is 1.4meq g -1 , purchased from Germany FuMA-Tech, GmbH) was dissolved in 20mL dimethylacetamide (DMAc) solvent, an...

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Abstract

The invention discloses an MOF material, a preparation method thereof, a proton exchange membrane, a preparation method thereof, and a fuel cell. The MOF material is formed by coordination of metal cobalt, harmine and methyl-(5-methyl-isoxazole-3-yl)-amine. The MOF material is doped into a polymer substrate to obtain the MOF and polymer composite proton exchange membrane. The MOF material provided by the invention not only has good proton conductivity, but also can avoid intersection of liquid methanol from an anode to a cathode.

Description

technical field [0001] The invention relates to the technical field of fuel cells, more specifically, to a MOF material and a preparation method thereof, a proton exchange membrane and a preparation method thereof, and a fuel cell. Background technique [0002] Proton exchange membrane fuel cell (PEMFC), which is a kind of green energy, has been extensively studied. Among them, direct methanol fuel cell (DMFC) has become an important research branch of fuel cells because liquid methanol fuel is easy to carry and can overcome the storage and energy density limitations of gaseous fuels (such as hydrogen). [0003] However, due to the diffusion mode operation in DMFC, there are large pores in the existing proton exchange membrane, resulting in the easy diffusion of methanol from the anode to the cathode during the oxidation reaction, because methanol is oxidized at the cathode, which can make the electrocatalyst in the oxygen reduction reaction , so, this anode-to-cathode cros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/023H01M8/0232H01M8/0243
CPCH01M8/023H01M8/0232H01M8/0243Y02E60/50
Inventor 马海庆贺迪华肖森林马杰
Owner 深圳氢时代新能源科技有限公司
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