Skip to main content

Proton Exchange Membrane Fuel Cell

 

Proton Exchange Membrane Fuel Cell

Research on Bipolar Plate of Proton Exchange Membrane Fuel Cell

With the world’s increasing energy demand and environmental pollution concerns, fuel cells have attracted widespread attention. They are a power generation system that directly and continuously convert chemical energy into electrical energy. It is the fourth type of power generation after hydropower, thermal power and nuclear power. Device. Theoretically, the fuel cell electric heating conversion efficiency can reach 85%~90%. According to different electrolytes, fuel cells can be divided into alkaline fuel cells (AFC), phosphoric acid fuel cells (PAFC), molten carbonate fuel cells (MCFC), solid oxide fuel cells (SOFC) and proton exchange membrane fuel cells (PEMFC) Five categories. Among them, the proton exchange membrane fuel cell is a low-temperature fuel cell (as shown in Figure 1). It has the characteristics of high conversion efficiency, low operating temperature and low pollution. It has a wide range of applications. It is currently mainly used in transportation, convenient power supply devices and households. Power generation equipment and other fields.

质子交换膜燃料电池双极板研究 - 燃料电池双极板涂层 - 杭州驰飞

Fuel cell is an efficient and environmentally friendly power generation system that converts chemical energy directly and continuously into electrical energy. Among them, the proton exchange membrane fuel cell has the advantages of long life, high specific power and specific energy, and fast start-up speed at room temperature. It can be used as a mobile power source and a fixed power source, and has broad applications in military, transportation, communications and other fields. Prospects are considered to be one of the ideal power sources to adapt to future energy and environmental requirements.

The bipolar plate is one of the core components of the proton exchange membrane fuel cell, which occupies a large part of the quality and cost of the battery pack, and is responsible for the functions of uniformly distributing the reaction gas, conducting current, and connecting the single cells in series. In order to meet these functional requirements, the ideal bipolar plate should have the characteristics of high thermal/electrical conductivity, corrosion resistance, low density, good mechanical properties, low cost and easy processing. However, the currently produced bipolar plates have problems such as poor corrosion resistance and conductivity, high production costs and short life span. Realizing the reasonable matching of the conductivity and corrosion resistance of the bipolar plate material, that is, achieving high corrosion resistance under the premise of ensuring reasonable conductivity, ensuring the service life of the entire system, is one of the key links in the commercialization of fuel cells .

The function of the bipolar plate is mainly reflected in separating the oxidant and fuel, conducting current, and supporting the membrane electrode to keep the stack structure stable. Therefore, the bipolar plate must have gas barrier properties, good electrical conductivity and corrosion resistance, and certain mechanical properties ( strength). The current key problem of bipolar plate materials is how to achieve a reasonable match between the conductivity and corrosion resistance of the coating material, that is, to achieve high corrosion resistance under the premise of ensuring reasonable conductivity, and to ensure the service life of the entire system. The recently developed bipolar plate materials are mainly divided into three categories: metal bipolar plates, graphite bipolar plates and composite bipolar plates. This article systematically summarizes the research progress of these three types of bipolar plate materials, including the conduction of bipolar plates. / Thermal, corrosion resistance and mechanical properties, as well as the advantages and disadvantages of various materials and application areas.

At present, the main materials widely used as the base material of the bipolar plate of the proton exchange membrane fuel cell are graphite materials, metal materials and composite materials. The bipolar plates made of these three materials have different advantages and disadvantages, but on the whole they cannot meet the performance requirements of the bipolar plates. In response to the above problems, in recent years, researchers have used doping or surface modification methods to make up for the lack of performance of bipolar plate materials. Many improved materials can already meet the performance proposed by the US Department of Energy. Claim.

Preparation of Fuel Cell Bipolar Plate Coating

Ultrasonic spraying technology can prepare carbon-based catalyst coatings with high uniformity and high density, such as depositing platinum carbon, palladium carbon, ruthenium carbon and other catalyst coatings on Nafion proton exchange membranes, which are dense and uniform without swelling. Therefore, the ultrasonic spraying technology has been widely regarded by the industry as the key preparation technology of the membrane electrode of the proton exchange membrane fuel cell. Ultrasonic spraying equipment can be sprayed on a variety of different metal alloys, including the preparation of platinum, nickel, iridium and ruthenium-based fuel cell catalyst coatings, as well as PEMs, GDLs, DMFCs (direct methanol fuel cells) and SOFCs (solid oxide fuels) Battery). The battery manufactured by this technology has the characteristics of high battery load and high battery efficiency.

 

Comments

Popular posts from this blog

Fuel Cell Catalyst Coatings

Fuel Cell Catalyst Coating A fuel cell works much like an electric battery, converting chemical energy into electrical energy using the movement of charged hydrogen ions across an electrolyte membrane to generate current. There they recombine with oxygen to produce water – a fuel cell’s only emission, alongside hot air. Although less efficient than electric batteries, today’s fuel cells compare favourably with internal combustion engine technology, which converts fuel into kinetic energy at roughly 25 per cent efficiency. A fuel cell, by contrast, can mix hydrogen with air to produce electricity at up to 60 per cent efficiency. Fuel cell catalyst coating systems are particularly suitable for these challenging applications by creating highly uniform, repeatable and durable coatings. From R&D to production, our anti-clogging technology can better control coating properties, significantly reduce material usage, and reduce maintenance and downtime. Ultrasonic spraying of other metal al...

Fuel Cell Carbon Paper Spraying

Fuel Cell Carbon Paper Spraying Carbon paper (carbon cloth), also known as carbon fiber paper (cloth), is a special material for fuel cell experiments, that is, gas diffusion layer, which is an indispensable item in the heart-membrane electrode assembly (MEA) of fuel cells It plays the role of a bridge between MEA and bipolar plate. Proton exchange membrane  fuel cell  is currently one of the most promising clean energy sources. The gas diffusion layer is an important part of the proton exchange membrane  fuel cell . Carbon paper is the most widely used substrate material for gas diffusion layer due to its excellent performance and relatively mature paper-making process. An aerospace university cooperated with our company to purchase UAM4000L ultrasonic precision spraying equipment from our company to do fuel cell carbon paper spraying. The spraying area is 1 1-3 3CM, covering 1-5 mg of carbon black per square centimeter. The thickness is between 0.5-6 microns. Ultrasonic...

Ultrasonic Coating Systems for Fuel Cell Catalyst Coatings

Ultrasonic Coating Systems for Fuel Cell Catalyst Coatings Ultrasonic spray systems are used to coat Nafion, Fumion or other catalytic membranes with carbon black or other catalyst inks during fuel cell manufacturing. Cheersonic ultrasonic spray systems achieve 95%+ effective use of platinum when spraying expensive catalyst chemistries. Uniform thin film maximize surface area exposure of catalyst with homogeneous pinhole-free films. Visit https://www.cheersonic-liquid.cn/en About Cheersonic Cheersonic is the leading developer and manufacturer of ultrasonic coating systems for applying precise, thin film coatings to protect, strengthen or smooth surfaces on parts and components for the microelectronics/electronics, alternative energy, medical and industrial markets, including specialized glass applications in construction and automotive. The Company’s solutions are environmentally-friendly, efficient and highly reliable, and enable dramatic reductions in overspray, savings in raw materi...