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Preparation method of Ti4O7 coating on surface of metal titanium bipolar plate of proton exchange membrane fuel cell

A proton exchange membrane, fuel cell technology, applied in fuel cells, metal material coating process, coating and other directions, can solve the problem of forming conditions restricting the development of coating, achieve uniform and dense coating, experimental process safety, guarantee The effect of purity

Active Publication Date: 2021-11-02
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Known Ti 4 o 7 Most of the preparation conditions require the use of H 2 As a reducing agent, the temperature condition is above 800°C, and the reduction time is 3 to 6 hours. The harsh formation conditions limit the Ti 4 o 7 Coating Development

Method used

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  • Preparation method of Ti4O7 coating on surface of metal titanium bipolar plate of proton exchange membrane fuel cell
  • Preparation method of Ti4O7 coating on surface of metal titanium bipolar plate of proton exchange membrane fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1, Ti 4 o 7 The preparation method of the coating is as follows:

[0029] (1) Substrate pretreatment: use pure Ti plate as the base material, cut the Ti plate base material into thin slices of length × width × height = 10mm × 10mm × 2mm, and pretreat the base material, that is, use 600-mesh and 1000-mesh sandpaper Polish the Ti plate base material in turn, and then place it in acetone solution and pure water for ultrasonic treatment in turn. During the treatment, put it in an ultrasonic cleaner for 3 to 5 minutes to remove oil. The temperature of ultrasonic cleaning is room temperature, and then Then put it into an oven at 200° C. for 10 minutes to dry.

[0030] (2) Preparation of TiO 2 Thin film: Put the Ti plate substrate treated in step (1) into a tube furnace and calcine and oxidize it in the air at 700°C for 420min to obtain a layer of rutile TiO on the surface of the Ti plate substrate. 2 Thin film; during calcination, the temperature was raised to 700...

Embodiment 2

[0034] Example 2, Al 2 o 3 The preparation method of composite coating is as follows:

[0035] (1) Substrate pretreatment: use pure Ti plate as the base material, cut the Ti plate base material into thin slices of length × width × height = 10mm × 10mm × 2mm, and pretreat the base material, that is, use 600-mesh and 1000-mesh sandpaper Grind the base material of the Ti plate respectively, and then place it in acetone solution and pure water for ultrasonic treatment in turn. During the treatment, place it in an ultrasonic cleaner for 3 to 5 minutes to remove oil. The temperature of the ultrasonic cleaning is room temperature, and then Then put it into an oven at 200° C. for 10 minutes to dry.

[0036] (2) Preparation of TiO 2 Thin film: Put the Ti plate base material treated in step (1) into a tube furnace and calcine and oxidize it in the air at 700°C for 420min. A layer of rutile TiO is obtained on the surface of the board substrate 2 film.

[0037] (3) Preparation of mi...

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Abstract

The invention discloses a preparation method of a Ti4O7 coating on the surface of a metal titanium bipolar plate of a proton exchange membrane fuel cell. The preparation method comprises the following steps of (1) taking a pure Ti plate as a base material, and carrying out surface cleaning work such as polishing, ultrasonic cleaning and the like on the base material; (2) preparing a TiO2 thin film, specifically, putting the cleaned Ti plate into a high-temperature tube furnace, and calcining and oxidizing for 420 minutes in air at 700 DEG C to obtain the rutile type TiO2 thin film on the surface of the Ti plate base material; (3) preparing a reducing agent, specifically, mixing nano TiO2 powder and Ti powder in proportion, and uniformly grinding by using a mortar to obtain the reducing agent; and (4) preparing the Ti4O7 coating, specifically, embedding the Ti plate base material treated in the step (2) into the reducing agent, putting the Ti plate base material into a vacuum tube furnace, and calcining for 10 minutes at 880 DEG C under the protection of inert gas to obtain the Ti4O7 coating on the surface of the metal titanium bipolar plate of the proton exchange membrane fuel cell. According to the method, H2 does not need to be used as the reducing agent, the whole operation process is simple and safe, the reaction time is short, the production efficiency is high, and the prepared Ti4O7 coating is good in binding property with a matrix and compact and complete.

Description

technical field [0001] The invention belongs to the technical field of metal bipolar plate surface treatment, in particular to Ti on the surface of a proton exchange membrane fuel cell titanium bipolar plate. 4 o 7 Coating preparation method. Background technique [0002] Fuel cell is the fourth power generation technology after hydropower, thermal power and atomic power, which can directly convert the chemical energy in the fuel into electrical energy. Fuel cells are known as a new generation of clean energy due to their high working efficiency and low discharge of pollutants. Proton exchange membrane fuel cell (PEMFC) is one of the most promising fifth-generation fuel cells, which uses H 2 , O 2 as raw material, H 2 O is the only by-product, so PEMFC is known for its cleanliness and high efficiency. PEMFC is mainly composed of bipolar plate, gas diffusion layer, catalytic layer and proton exchange membrane. The weight and cost of bipolar plate account for most of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/10C23C8/02C23C26/00H01M8/0228
CPCC23C8/10C23C8/02C23C26/00H01M8/0228Y02E60/50Y02P70/50
Inventor 王艳丽谭茜匀张盛华
Owner GUANGXI UNIV
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