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A kind of method that magnetron sputtering prepares ceo2/ptfe/nafion composite film

A technology of magnetron sputtering and PTFE, which is applied in sputtering coating, electrochemical generator, vacuum evaporation coating, etc., can solve the problems of damaging the performance of proton exchange membrane battery and prone to fracture, etc., and achieves the benefit of casting composite , Improve hydrophilicity, reduce the effect of damage

Inactive Publication Date: 2018-10-02
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using PTFE as the substrate can reduce the amount of Nafion resin used, and the cost is much lower than that of pure Nafion membranes. However, PTFE is a hydrophobic membrane, and Nafion is a hydrophilic membrane. If the two are forced to be combined, they are prone to breakage, which is also Greatly damage the performance of proton exchange membrane batteries

Method used

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  • A kind of method that magnetron sputtering prepares ceo2/ptfe/nafion composite film
  • A kind of method that magnetron sputtering prepares ceo2/ptfe/nafion composite film
  • A kind of method that magnetron sputtering prepares ceo2/ptfe/nafion composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] PTFE microporous membrane pretreatment: Flatten the PTFE microporous membrane with two A4 papers, put it under the flat paper cutter, cut into several 7×7cm PTFE microporous membranes, cut the cut PTFE microporous membranes The film was immersed in acetone solution, soaked in a fume hood for 20 hours, then soaked in 98% ethanol solution for 10 hours, after soaking for many times to remove acetone, washed with deionized water to remove ethanol, and finally dried at 60°C for 10 hours to obtain Cleaned PTFE microporous membrane.

[0029] Target pretreatment: the CeO 2 The target material was wiped several times with acetone, then wiped with 98% ethanol, dried, and placed in a magnetron sputtering coating machine.

[0030] First put the pretreated PTFE microporous membrane in a magnetron sputtering coating machine, in an argon atmosphere, adjust the sputtering power to 60w, the sputtering pressure to 0.6Pa, and the sputtering time to 30s, 60s, 90s, 120s, 150s, 180s.

[0...

Embodiment 2

[0034] PTFE microporous membrane pretreatment: soak PTFE microporous membrane in acetone solution for 20 hours; then soak in 98% ethanol solution for 10 hours, after soaking for many times to remove acetone, wash with deionized water to remove ethanol; finally at 60°C Dry for 10 hours to obtain a cleaned PTFE microporous membrane.

[0035] Target pretreatment: the CeO 2 The target material was wiped several times with acetone, then wiped with 98% ethanol, dried, and placed in a magnetron sputtering coating machine.

[0036] Put the pretreated PTFE microporous membrane in a magnetron sputtering coating machine in an argon atmosphere, adjust the sputtering time to 120s, the sputtering pressure to 0.6Pa, and the sputtering power to 20w, 40w, 60w, and 80w respectively , 100w.

[0037] Casting Nafion resin: Mix dimethyl sulfoxide and 5% Nafion resin at a ratio of 3:1, put it in a rotary evaporator until the weight of the mixed solution is constant, cool to room temperature, and i...

Embodiment 3

[0040] PTFE microporous membrane pretreatment: soak PTFE microporous membrane in acetone solution for 20 hours; then soak in 98% ethanol solution for 10 hours, after soaking for many times to remove acetone, wash with deionized water to remove ethanol; finally at 60°C Dry for 10 hours to obtain a cleaned PTFE microporous membrane.

[0041] Target pretreatment: the CeO 2 The target material was wiped several times with acetone, then wiped with 98% ethanol, dried, and placed in a magnetron sputtering coating machine.

[0042] Put the pretreated PTFE microporous membrane in a magnetron sputtering coating machine, in an argon atmosphere, adjust the sputtering time to 120s, the sputtering pressure to 60W, and the sputtering pressure to 0.2Pa, 0.4Pa, 0.6Pa, 0.8Pa, 1.0Pa.

[0043] Casting Nafion resin: Mix dimethyl sulfoxide and 5% Nafion resin at a ratio of 3:1, put it in a rotary evaporator until the weight of the mixed solution is constant, cool to room temperature, and impregna...

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Abstract

The invention discloses a method for preparing a CeO2 / PTFE / Nafion composite membrane by a magnetron sputtering method. CeO2 is sputtered on the surface of a PTFE membrane by the magnetron sputtering method by controlling the conditions of sputtering time, sputtering power, pressure and the like to prepare a CeO2 / PTFE composite membrane; Nafion resin is cast on the CeO2 / PTFE composite membrane to prepare the CeO2 / PTFE / Nafion composite membrane; and through measurement, the moisture content of the prepared CeO2 / PTFE / Nafion composite membrane reaches 30% and the proton conductivity reaches 0.071s / cm. The prepared CeO2 / PTFE / Nafion composite membrane is low in cost; the contact angle of the modified composite membrane is reduced to 60 degrees from 130 degrees; the mechanical strength is fixed; the service lifetime is obviously prolonged; and the CeO2 / PTFE / Nafion composite membrane can be applied to a proton-exchange membrane fuel cell.

Description

technical field [0001] The invention belongs to the field of proton exchange membrane materials for fuel cells, and in particular relates to a magnetron sputtering method for loading CeO on polytetrafluoroethylene microporous membranes 2 , and then cast Nafion resin to prepare CeO 2 / PTFE / Nafion composite membrane. Background technique [0002] At present, fuel cells are mainly classified by electrolyte type, including phosphate fuel cells, molten carbonate fuel cells, solid oxide fuel cells, alkaline fuel cells, and proton exchange membrane fuel cells. Proton exchange membrane fuel cell has the advantages of high energy conversion rate, high power density, rapid start-up and low pollution, which makes proton exchange membrane fuel cell become a hot spot in current research. As one of the core components of the proton exchange membrane fuel cell, the proton exchange membrane is used to provide proton migration and transport channels, so that the protons pass through the me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1016H01M8/1069C23C14/35
CPCC23C14/35H01M8/1016H01M8/1069Y02E60/50
Inventor 杨加志刘晓慧夏庆成韩静曾干敏毛霏孙东平
Owner NANJING UNIV OF SCI & TECH
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