Fuel Cell Technology :: Exploratory Essays Research Papers

Fuel Cell Technology Fuel Cells are a hot topic these days between the soon to come fuel cell cars that Toyota and Honda plan on unveiling this year and the $1.2 billion president Bush announced he would dedicate to fuel cell research during his State of the Union address. The least efficient of these electrochemical energy converters are at least as efficient as internal combustion engines and many are doubly as efficient when using special techniques. Exhaust from fuel cells is extremely clean, often consisting only of water. Although some use hydrocarbons, fuel cells give off around one one-hundredth of the pollutants given off by an internal combustion engine using the same amount of fuel (Fuel Cell Technology Handbook). Unfortunately some engineering and infrastructure problems, especially costs, are keeping fuel cells from commercial viability right now. A Brief History of Fuel Cell Technology The ideas behind fuel cells have existed for around one hundred and sixty years. Sir William Grove is cited as the first person to think that one could produce a current by reversing the electrolysis of water (SAE.org). However, it was until fifty years later that the term ‘fuel cell’ was coined by two researchers, Charles Langer and Ludwig Mond, trying to invent the first viable fuel cell fueled by coal gas (SAE.org). The technology lay dormant for most of the early twentieth century because of great advances in the use of internal combustion engines. It wasn’t until 1959 that practical fuel cells were first demonstrated. NASA quickly took interest in the technology for the Apollo missions and since there has been a renaissance in research and development of fuel cells. Currently, there are on the order of hundreds of fuel cell generators in operation world wide, cities such as L.A., Chicago, and New York, own fuel cell powered public transit vehicles, and both Honda and Toyota plan on making fuel cell powered car commercially available within one year (fuelcells.org). How a Fuel Cell Works A fuel cell is an energy converter that uses electrochemical energy to create an electric current. Because they use electrochemistry for power, fuel cells are often likened to batteries that run on fuel. This description is not a bad one, but to be more precise, a fuel cell creates direct current by ionizing a fuel and then moving those ions through a circuit. The three main components are the anode (negatively charged piece), cathode (positively charge piece), and electrolyte (medium for the transfer of ions). Fuel, typically hydrogen, is ionized at the anode by a catalyst (substance that can change an interaction, but does not change the chemistry of it).