What is the PEM fuel cell and SOFC?
什么是质子交换膜燃料电池？What is a PEM fuel cell?
A fuel cell is a device that converts chemical potential energy (energy stored in molecular bonds) into electrical energy. A PEM (Proton Exchange Membrane) fuel cell uses hydrogen gas (H2) and oxygen gas (O2) as fuel. The products of the reaction in the cell are water, electricity, and heat. This is a big improvement over internal combustion engines, coal burning power plants, and nuclear power plants, all of which produce harmful by-products.
Since O2 is readily available in the atmosphere, we only need to supply the fuel cell with H2 which can come from an electrolysis process
About hydrogen as an energy carrier
Hydrogen is also an energy carrier like electricity. This means that hydrogen is not a primary energy source, but can be used to store, transport and provide energy. Flexibility is high, because hydrogen can be produced from many sources, including renewable resources such as wind power and solar energy.
Environmental and health benefits of hydrogen
Reducing emissions from vehicles is important for our environment and also good for our health. It is also important for reducing the harmful effects air pollution from exhaust gases have on our health, a major problem in many urban areas today. Fuel cell technology is a part of the solution.
什么是固体氧化物燃料电池？What is a Solid Oxide Fuel Cell?
A fuel cell is like a battery that always runs. It consists of three parts: an electrolyte, an anode, and a cathode.
For a solid oxide fuel cell, the electrolyte is a solid ceramic material. The anode and cathode are made from special inks that coat the electrolyte. Unlike other types of fuel cells, no precious metals, corrosive acids, or molten materials are required.
Next, an electrochemical reaction converts fuel and air into energy, specifically electricity without combustion.
A solid oxide fuel cell (SOFC) is a high temperature fuel cell. At high temperature, warmed air enters the cathode side of the fuel cell and steam mixes with fuel to produce reformed fuel…?which enters on the anode side.
Next, the chemical reaction begins in the fuel cell. As the reformed fuel crosses the anode, it attracts oxygen ions from the cathode. The oxygen ions combine with the reformed fuel to produce electricity, water, and small amounts of carbon dioxide.
The water gets recycled to produce the steam needed to reform the fuel. The process also generates the heat required by the fuel cell.
As long as there's fuel, air, and heat, the process continues producing clean, reliable, affordable energy.