This is definitely fake news. Energy is released when hydrogen and oxygen react to form water. Therefore, external energy must be absorbed to break down water into hydrogen and oxygen. The news says that water can be broken down into hydrogen and oxygen without any. Electric energy. This is absolutely true. This cannot be achieved. I specialize in water electrolysis and hydrogen production equipment, even China is. stronger than Japan. It's not Japan's turn.
The main types of fuel cells are:
1. ) is a type of fuel cell that directly combines fuel gas and oxidant gas. An all-solid energy conversion device that converts chemical energy into electrical energy and has the structure of a general fuel cell.
2. RFC
Hydrogen fuel cells use hydrogen as fuel, whichi reacts electrochemically with oxygen to generate electrical energy through a proton exchange membrane. Hydrogen and oxygen react to generate water without emitting pollutants such as hydrocarbons, carbon monoxide, nitrogen compounds and carbon dioxide. It is pollution-free and has high power generation efficiency.
3. DMFC
A proton exchange membrane fuel cell that directly uses methanol as fuel is generally called a direct methanol fuel cell (DMFC). The membrane electrode is mainly composed of a methanol anode, an oxygen cathode and a proton exchange membrane (PEM). The anode and cathode are respectively composed of stainless steel plate, plastic film, copper current collecting plate, graphite, gas diffusion layer and catalytic with porous structure.
A stackFuel generator is a chemical device that directly converts the chemical energy of fuel into electrical energy, also known as an electrochemical generator. It is the fourth electricity generation technology after hydropower, thermal power and atomic energy. Since the fuel cell converts the Gibbs free energy part of the chemical energy of the fuel into electrical energy through electrochemical reactions, it is not limited by the Carnot cycle effect and is therefore very efficient .
Detailed information:
The advantages of fuel cells are:
< p >1. High energy production efficiencyThe energy production by fuel cell is not limited by the Carnot cycle. Theoretically, its power generation efficiency can reach 85-90%. However, due to various polarization limitations duringnt operation, the current energy conversion efficiency of fuel cells is about 40-60%.
2. Low environmental pollution
When the fuel cell uses hydrogen-rich gas such as natural gas as fuel, carbon dioxide emissions are reduced by more than 40% compared to heat . driving process, which is beneficial in mitigating the Earth's greenhouse effect, is very important.
3. High specific energy
The specific energy of liquid hydrogen fuel cells is 800 times that of nickel-cadmium batteries, and the specific energy of direct methanol fuel cells is higher than that -there. lithium-ion batteries (the highest energy density) are more than 10 times higher.
4. Wide range of fuels
For fuel cells, any substance containing hydrogen atoms can be used as fuel, such asnatural gas, petroleum, coal and other fossil products, or biogas. , Alcohol, methanol, etc.,Therefore, fuel cells fully meet the demand for energy diversification and can slow down the depletion of traditional energy.
5. High reliability
When the fuel cell load changes, it responds quickly. Regardless of overload operation above rated power or operation below rated power, it can withstand it with little change in efficiency.
Baidu-Fuel Cell Encyclopedia