How batteries can save the world: Technical editor Dr Mike McDonagh compares the efficiencies of storing energy via water electrolysis to produce hydrogen with conventional electrochemical batteries.
There are many advocates for the use of hydrogen as a fuel and method of energy storage. Most concepts for use of hydrogen address the problems of harnessing the energy from variable and unpredictable renewable sources such as wind and solar.
At the moment there seems to be a commercial competition between H2 and electrochemical energy storage (ECES or EC battery) methods to store this energy. This rivalry stretches to comparisons between hydrogen . . .