What is the meaning of hydrogen energy?

[ElisaMarie]

Hydrogen energy refers to using hydrogen as an energy source. Hydrogen energy has the advantages of being the lightest weight, having the best thermal conductivity, abundant reserves, being recyclable, high calorific value, excellent combustion performance, environmental friendliness, multiple utilization forms, various states, and minimal loss. Hydrogen-powered vehicles are divided into two types: hydrogen internal combustion engine vehicles, which use an internal combustion engine to burn hydrogen (usually obtained through methane decomposition or water electrolysis) to generate power to propel the vehicle; and hydrogen fuel cell vehicles, which use hydrogen or hydrogen-containing substances to react with oxygen in the air in a fuel cell to generate electricity to power an electric motor, which then drives the vehicle. The Audi A7 Sportback h-tron quattro, as a hydrogen fuel cell vehicle, is equipped with two electric motors on the front and rear axles, each with a maximum output of 85 kW and a maximum torque of 270 Nm, resulting in a total power of 170 kW and a torque of up to 540 Nm. The car accelerates from 0 to 100 km/h in 7.9 seconds and has a top speed of 180 km/h, comparable to gasoline-powered vehicles.