An electrostatic-induction potential-superposed hydrogen electrolytic cell for the synthesis of stoichiometric H-2-O-2 fuel for fuel cells has been developed for use of the hydrogen energy cycle to produce electric power. This hydrogen electrolytic system works on a mechanism, where the power used is theoretically 17% of the total electrical energy required, while the remaining 83% is provided as electrostatic energy. A combined cycle of H-2-O-2 fuel cell and this type of electrolyser is introduced to achieve the highest energy efficiency for a fuel cell and full sustainability for the fuel. Part of the power delivered by the fuel cell is returned to the electrolyser, while the remaining represents the net power output. According to theoretical calculations, the net power output can exceed 70% of that delivered by the H-2-O-2 fuel cell, without violating the laws of thermodynamics. (C) 2015 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.