Physics, energy, Fuel Cells

A fuel cell is a device that generates electricity directly from a chemical reaction between a fuel and an oxidant, without burning the fuel. The most common type uses hydrogen as the fuel and oxygen, drawn from the air, as the oxidant. Inside the cell, hydrogen is supplied to one electrode and oxygen to the other, separated by an electrolyte. A chemical reaction strips electrons from the hydrogen, forcing them through an external circuit and producing an electric current, before they recombine on the other side. When hydrogen and oxygen react, the principal by-product is water.

Although a fuel cell resembles a battery in producing electricity electrochemically, it differs in an important way. A battery contains a fixed store of chemical energy and is depleted as it discharges, whereas a fuel cell continues to generate electricity for as long as fuel and oxygen are fed to it. In this respect a fuel cell behaves more like a small power plant than a storage device, and it stops only when the supply of reactants is cut off.

Several fuel cell designs exist, distinguished mainly by their electrolyte and operating temperature. Solid oxide fuel cells use a solid ceramic electrolyte and run at high temperatures, which lets them operate efficiently and use a wider range of fuels, though the heat imposes demands on materials. Because their main emission can be water, fuel cells are of interest for clean power generation and as part of systems that store and use renewable energy, where hydrogen produced from surplus electricity can later be converted back into power.

Frequently asked questions

How does a hydrogen fuel cell produce electricity?: Hydrogen and oxygen react across an electrolyte, and the reaction forces electrons through an external circuit as a current. The main by-product is water.
How is a fuel cell different from a battery?: A battery stores a fixed amount of energy and runs down, while a fuel cell keeps generating electricity as long as it is supplied with fuel and oxygen.
What is special about solid oxide fuel cells?: They use a solid ceramic electrolyte and operate at high temperatures, which allows efficient operation and the use of a wider range of fuels.

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Fuel cells

Brandstofcel in Dutch

Fuel cell animation

Fuel cells a fuel cell is an electrochemical energy conversion device that converts hydrogen and oxygen into electricity and heat. It is very much like a battery that can be recharged while you are drawing power from it. Instead of recharging using electricity, however, a fuel cell uses hydrogen and oxygen

Fuel cells history

Fuel cell technology fuel cells operate much like a battery, turning oxygen and hydrogen into electricity in the presence of an electrically conductive material called an electrolyte. Unlike a battery, however, fuel cells never lose their charge, pdf file

Fuel cell basics a fuel cell is a device that generates electricity by a chemical reaction. Every fuel cell has two electrodes, one positive and one negative, called, respectively, the cathode and anode. The reactions that produce electricity take place at the electrodes

Fuel cells fuel cells, a fuel cell works like a battery but does not run down or need recharging. It will produce electricity and heat as long as fuel (hydrogen) is supplied, How fuel cells work, The future of fuel cells fuel cells convert the chemical energy of fuels directly into electricity

Fuel cells a fuel cell operates like a battery. Unlike a battery, a fuel cell does not run down or require recharging. It will produce energy in the form of electricity and heat as long as fuel is supplied. A fuel cell consists of two electrodes sandwiched around an electrolyte. Oxygen passes over one electrode and hydrogen over the other, generating electricity, water and heat

Fuel Cells - Hydrogen - Renewables

Fuel cells pdf file

Fuel cells, part of Hydrogen technologies

Fuel cells Types of fuel cells, Solid oxide fuel cells (SOFCs), Electrolyte, Electrode materials, Interconnection, Thermodynamics, System and outlook, Molten carbonate fuel cells (MCFCs), Electrolyte, Electrochemistry, Electrodes, Proton exchange membrane fuel cells (PEMFCs), Membrane, Electrodes and membrane-electrode assembly, Efficiency and reaction conditions

Fuel cells a fuel cell operates like a battery, a fuel cell does not run down or require recharging. It will produce energy in the form of electricity and heat as long as fuel is supplied

Fuel cells: types Polymer Electrolyte Membrane (PEM) fuel cells, direct methanol fuel cells, alkaline fuel cells, phosphoric acid fuel cells molten carbonate fuel cells, solid oxide fuel cells, regenerative fuel cells

Fuel cells: types fuel cells are electrochemical devices that convert the chemical energy of a reaction directly into electrical energy. The basic physical structure or building block of a fuel cell consists of an electrolyte layer in contact with a porous anode and cathode on either side

Fuel cells using renewable energy sources – a leap to hydrogen ... pdf file

Fuel Cells Working Concept Fuel cells are electro-chemical device that convert chemical energy on hydrogen into DC electrical energy. Its mainly different with battery, battery consume DC electric energy with long times when charging and generate DC electric energy when discharging

Fuel cell technology and application pdf file

How fuel cells work

Hydrogen fuel cell an interactive look at how a fuel cell uses hydrogen

Hydrogen fuel cell hydrogen fuel cells

Hydrogen fuel cells the structure of a fuel cell and the chemical equations taking place within

Hydrogen properties pdf file

Introduction to fuel cell technology pdf file

PEM fuel cell mechanism polymer electrolyte membrane (PEM)

PEM Fuel Cell Schematic pdf file

Solid oxide fuel cells Solid-oxide fuel cells (SOFC) with hydrocarbon and hydrocarbon-derived fuels, pdf file

Solid oxide fuel cells a fuel cell is a device that generates electricity by a chemical reaction. Every fuel cell has two electrodes, one positive and one negative, called, respectively, the cathode and anode. The reactions that produce electricity take place at the electrodes, Educypedia

Solid oxide fuel cells

Solid oxide fuel cells solid oxide fuel cells

Thin film solid oxide fuel cells

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