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Frequently asked questions

A fuel cell is an innovative device that converts the chemical energy of hydrogen into electricity. It consists of two key elements, an anode and a cathode, separated by an electrolyte. When hydrogen is supplied to the anode, it decomposes into electrons and protons. The electrons are then directed to the cathode to participate in an electrochemical reaction that produces electricity and water. Fuel cells are considered low-carbon because they only produce water as a byproduct.

In summary, fuel cells are an advanced solution for producing electricity from a sustainable and environmentally friendly energy source like hydrogen.

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Hydrogen fuel cells are low-carbon devices that produce electricity through the chemical reaction between hydrogen and oxygen. They consist of an anode, a cathode, and an electrolyte that separates these two elements. When hydrogen is introduced into the cell, it is ionized into protons and electrons. The protons pass through the electrolyte to the cathode where they combine with oxygen to form water. Meanwhile, the electrons are directed through an external electrical circuit to produce electricity. This process produces no greenhouse gases, making it an environmentally friendly solution for electricity generation.

Fuel cells can be used to power electric vehicles, buildings, and other applications that require clean and sustainable energy. They can also be used to store energy produced by intermittent sources such as solar and wind power.

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Fuel cells and lithium-ion batteries are different energy storage technologies with distinct advantages and limitations. The main differences are as follows:

  • Energy source: Fuel cells use hydrogen as an energy source, while lithium-ion batteries use organic or inorganic intercalation materials to store electrical energy.
  • Electricity production process: Fuel cells generate electricity through an electrochemical reaction between hydrogen and oxygen, while lithium-ion batteries produce electricity by transferring lithium ions from one electrode to another.
  • Lifespan: Fuel cells have a longer lifespan than lithium-ion batteries because they do not experience performance degradation due to crystalline structure formation over time.
  • Discharge rate: Fuel cells can operate at higher discharge rates than lithium-ion batteries, making them more suitable for high-power applications.
  • Safety: Fuel cells may be safer than lithium-ion batteries because energy is decoupled from power. The supply of hydrogen can be easily cut off, significantly reducing the risk of serious accidents, fires, and explosions.
  • Cost: Fuel cells are more expensive than lithium-ion batteries due to the need to produce pure hydrogen to power the cells.
Features Fuel cell Lithium-ion batteries
Power source Hydrogen Organic or inorganic interlayer materials
Electricity generation process Electrochemical reaction between hydrogen and oxygen Transfer of lithium ions from one electrode to the other
Service life 10-15 years 2-3 years
Discharge rate High Lower
Security Safer Less safe
Cost €€€ €€
Environmental footprint Low Higher
Flexible application High Lower

Hydrogen is a versatile energy carrier that can be produced and stored in various ways.

To produce energy, hydrogen can be used in a combustion reaction or a fuel cell. This process generates electricity and water vapor. Additionally, hydrogen can also be used as fuel for internal combustion engines.

Hydrogen can be stored either as a gas in high-pressure containers or as a liquid in insulated thermal tanks. Thus, hydrogen is an energy source that can be produced on demand and stored for later use.

Hydrogen can contribute to the energy transition in several ways:

  • Clean energy source: Using hydrogen to produce energy only generates water vapor as a byproduct, making it a clean and sustainable energy source.
  • Energy storage: Hydrogen can be used to store energy produced by renewable energy sources such as solar and wind power for later use.
  • Substitute for fossil fuels: Hydrogen can be used as a substitute for fossil fuels in energy production, thereby helping to reduce greenhouse gas emissions.
  • Technology development: Developing hydrogen production, storage, and utilization technology can stimulate innovation and investment in clean energy.

Overall, the use of hydrogen can help create a more sustainable economy less reliant on fossil fuels, thus contributing to the energy transition.