Fuel Cell

Voltage reversal phenomenon is one of the main culprits of fuel cell failure! Operation errors, harsh working conditions and the anode gas shortage caused by the external environment are the main culprits for the voltage reversal. The voltage reversal is mainly accompanied by the water electrolysis reaction and the carbon corrosion reaction, and the attenuation of the battery cannot be reversed. Optimizing system control strategies and developing anti-reverse electrode materials are the main countermeasures. Cost, performance and durability are the three major obstacles to the commercialization of proton exchange membrane fuel cells. Among them, durability refers to the ability of a material or product to resist the long-term destructive effects of both itself and the objective environment. Generally, the working conditions that accelerate fuel cell degradation (affect durability) include start-stop, freezing/melting, idling (high potential), dry/wet cycle, and variable load. The parti...

Technology to quantify the mechanical strength of fuel cell electrodes for vehicles Mechanical stability, chemical stability and thermal stability are important considerations for the durability of fuel cell membrane electrode assemblies. Quantifying the mechanical strength of the catalytic layer can provide important support for the development of highly durable CCM. The key components of the proton exchange membrane fuel cell monomer are CCM, gas diffusion layer, electrode plate and seal. Among them, the catalytic layer of the vehicle fuel cell CCM is composed of a Pt or Pt alloy catalyst, a supporting carbon carrier and an ionomer. The mechanical strength of the proton exchange membrane fuel cell electrode (or catalytic layer) is mainly determined by the ionomer. The ionomer is not only an adhesive connecting the catalyst, but also a proton conducting carrier between the proton membrane and the active points of the catalytic layer. The durability of the electrode is an important par...

Fuel Cell Systems The design of fuel cell systems is complex, and can vary significantly depending upon fuel cell type and application. However, several basic components are found in many fuel cell systems: Fuel cell stack Fuel processor Power conditioners Air compressors Humidifiers FUEL CELL STACK The fuel cell stack is the heart of a fuel cell power system. It generates electricity in the form of direct current (DC) from electro-chemical reactions that take place in the fuel cell. A single fuel cell produces less than 1 V, which is insufficient for most applications. Therefore, individual fuel cells are typically combined in series into a fuel cell stack. A typical fuel cell stack may consist of hundreds of fuel cells. The amount of power produced by a fuel cell depends upon several factors, such as fuel cell type, cell size, the temperature at which it operates, and the pressure of the gases supplied to the cell. Learn more about the parts of a fuel cell. FUEL PROCESSOR The fuel pr...

 Parts of a Fuel Cell Polymer electrolyte membrane (PEM) fuel cells are the current focus of research for fuel cell vehicle applications. PEM fuel cells are made from several layers of different materials. The main parts of a PEM fuel cell are described below. The heart of a PEM fuel cell is the membrane electrode assembly (MEA), which includes the membrane, the catalyst layers, and gas diffusion layers (GDLs). Hardware components used to incorporate an MEA into a fuel cell include gaskets, which provide a seal around the MEA to prevent leakage of gases, and bipolar plates, which are used to assemble individual PEM fuel cells into a fuel cell stack and provide channels for the gaseous fuel and air. Membrane Electrode Assembly The membrane, catalyst layers (anode and cathode), and diffusion media together form the membrane electrode assembly (MEA) of a PEM fuel cell. POLYMER ELECTROLYTE MEMBRANE The polymer electrolyte membrane, or PEM (also called a proton exchange membrane)—a spec...

Fuel Cells A fuel cell uses the chemical energy of hydrogen or another fuel to cleanly and efficiently produce electricity. If hydrogen is the fuel, electricity, water, and heat are the only products. Fuel cells are unique in terms of the variety of their potential applications; they can provide power for systems as large as a utility power station and as small as a laptop computer. Why Study Fuel Cells Fuel cells can be used in a wide range of applications, including transportation, material handling, stationary, portable, and emergency backup power applications. Fuel cells have several benefits over conventional combustion-based technologies currently used in many power plants and passenger vehicles. Fuel cells can operate at higher efficiencies than combustion engines, and can convert the chemical energy in the fuel to electrical energy with efficiencies of up to 60%. Fuel cells have lower emissions than combustion engines. Hydrogen fuel cells emit only water, so there are no carbon...

Ultrasonic Nozzle Dual Liquid Feed All ultrasonic spray systems can install dual liquid feed assemblies. Dual liquid feeds give your process greater flexibility because the two liquids can be mixed directly on the atomizing surface of the nozzle. Advantages of dual liquid feed: • Ultrasonic atomization produces a tight and controllable droplet size distribution • Non-clogging ultrasonic nozzles are easy to clean and low maintenance • Micro-dispensing • Produces low-speed spherical droplets • Dual liquid feed avoids premature mixing of components

The heart of fuel cells-membrane electrodes Ordered membrane electrode is undoubtedly the main direction of the next generation of membrane electrode preparation technology. While reducing the platinum group element load, the following 5 aspects need to be further considered: 1) Ordered membrane electrode is very sensitive to impurities; 2 ) Broaden the operating range of membrane electrodes through material optimization, characterization, and modeling; 3) Introduce fast proton conductor nanostructures in the catalytic layer; 4) Low-cost mass production process development; 5) In-depth research on membrane electrode proton exchange membranes, electricity The interaction and synergy between the catalyst and the gas diffusion layer.