Superprotonic's Omnivorous Hydrogen Fuel Cell

A prototype fuel cell runs on a wide range of fuels without turning up the heat.

Published: 06-Jan-2009

Fuel cells are the most efficient way to convert chemical energy into electricity. But most either operate at high temperatures or require very pure hydrogen fuel. Superprotonic, a startup company in Pasadena, CA, is developing a fuel cell that can handle dirty hydrogen at relatively low temperatures. It could thus use hydrogen produced from other fuels--such as natural gas or ethanol--by a simple device called a "reformer."

In a fuel cell, an electrolyte is sandwiched between an anode and a cathode. A catalyst at the anode splits hydrogen into electrons and protons. The protons can pass through the electrolyte, but the electrons can't. So in order to reach the cathode, the electrons travel through an external electrical circuit, where they can be used to recharge a battery or power a device. At the cathode, another catalyst helps the protons and electrons combine with oxygen sucked from the air to form water--the fuel cell's only waste product.

Superprotonic's fuel cells rely on a material called a solid acid, first tested as an electrolyte in 2001 by Caltech materials-science and chemical-engineering professor Sossina Haile. "What makes our fuel cell special is the nature of this electrolyte," she says. Solid-acid fuel cells operate at what Haile calls a Goldilocks temperature: not too hot, not too cold.


The Cadillac Provoq fuel cell concept uses GM's E-Flex propulsion system, combining the new fifth-generation fuel cell system and a lithium-ion battery to produce an electrically driven vehicle that uses no petroleum and has no emission other than water.

Powered by a 100 kW electric engine and fuel cell stack, the i-Blue is capable of running more than 370 miles per refueling and achieves a maximum speed of more than 100 miles per hour.

Based on the full-size 2007 Chevrolet Silverado 1500 HD pickup truck, the vehicle underwent extensive internal modifications to meet the technical demands and requirements needed to run on a compressed hydrogen fuel system.


blog comments powered by Disqus