Fuel Cell with unpressurised Hydrogen and Oxygen

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SUMMARY

Creating a fuel cell using unpressurized hydrogen from a balloon and ambient oxygen is feasible in a DIY setting. The discussion confirms that while pressure is not a barrier, the energy storage density of hydrogen at atmospheric pressure is low. To enhance efficiency, pressurizing hydrogen is recommended. Participants suggest researching specific fuel cell designs and relevant equations to estimate power output effectively.

PREREQUISITES
  • Basic understanding of electrochemistry
  • Familiarity with fuel cell technology
  • Knowledge of gas laws and pressure effects
  • Experience with DIY laboratory setups
NEXT STEPS
  • Research different types of fuel cells, focusing on PEM (Proton Exchange Membrane) fuel cells
  • Learn about the effects of hydrogen pressure on fuel cell efficiency
  • Study the Nernst equation for predicting voltage output in fuel cells
  • Explore safety protocols for handling hydrogen in a DIY environment
USEFUL FOR

DIY enthusiasts, renewable energy researchers, and hobbyists interested in building and experimenting with fuel cells and hydrogen energy systems.

ANarwhal
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Let's say I have a balloon full of Hydrogen that is STP, and outside this balloon I have normal air (containing oxygen) which is also STP. Is there a way to produce energy by turning these 2 items into a fuel cell, if so how practical is it (in a DIY setting) and is there anything that would make it more efficient (such as pressurising the hydrogen)?
 
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It is possible and pressure should not be a problem. Just keep in mind that the energy storage density is quite low with hydrogen at air pressure.
 
How could I perform this experiment in a DIY lab? Are there any equations that I can use to predict how much power I should be getting?
 
I searched amazon.com for "Fuel Cell" and got plenty of hits for books dedicated to fuel cells. One of these should suite you.
 

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