What is a fuel cell?
Fuel cells convert chemical energy directly into electrical energy, which makes
fuel cells particularly efficient. The essential technical difference between
fuel cells and batteries is that fuel cells separate energy transformation and
energy storage. The fuel cell will continue to generate electrical current as
long as a gas of liquid medium is added.
SFC has patented a method of converting energy using fuel cells that allows for miniaturization by focusing on simplified fuel intake, sealing and electrical configuration. We have also used low-cost materials and mass production techniques to lower the cost of manufacturing fuel cells.
"Active Crossover Control" by SFC permits active monitoring and
minimization of the negative methanol crossover effect, thus upping the fuel
cell’s performance. The result is an extremely short startup time and highly
efficient fuel cells by SFC.
SFC have developed their own technology, which in turn, has provided the basis
for several patents. As a result, SFC enjoys a unique technological and
marketing edge in fuel-cell systems.
How do DMFC fuel cells work?
Low-temperature fuel cells are suitable for mobile applications because they
generate electricity at low temperatures. The two main types are hydrogen fuel
cells and direct methanol fuel cells. SFC has made a conscious decision to go
with DMFC technology because methanol is safer and more affordable.
Here is how a DMFC fuel cell works:
A mixture of methanol and water is introduced to the anode side by a patented
internal water-management system. This enables us to employ 100% pure methanol
in our fuel cartridges. Ambient air is pumped into the fuel cell on the cathode
side. An electrical circuit connects the anode and the cathode sides. Upon
contact with the platinum catalyst, methanol releases its electrons which flow
in the direction of the cathode. At the same time, protons are released and
these penetrate the membrane to the cathode. There, oxygen reacts with the
proton and electrons to form pure water.
During the chemical process, the fuel cell heats up to about 40° C, releasing
water as vapor and carbon dioxide. The amount of water vapor and carbon dioxide
released is comparable to that found in the breath of a child.
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