When it comes time to use the stored energy, hydrogen atoms are released and shed an electron to re-form protons. The electrons supply the power and the hydrogen protons combine with oxygen and other electrons to reform into water. Again, the fact that the battery doesn’t produce hydrogen gas is key. Traditional fuel cells must produce hydrogen gas then split it back into protons, a process that reduces efficiency. Because the proton battery doesn’t produce hydrogen gas, it’s far more efficient. Even as-is without optimizations, it is on par with lithium-ion batteries in terms of efficiency.
Source: http://www.nimbuzz.com/nl/article/technology/proton-battery-instead-of-lithium-battery-775
(Figure 4)
Figure 4
MAQ/September 2018 / 05