Multilayered ion exchange membranes

A hydride heat engine comprising:

• a) a hot water source;
• b) a multi-stage metal hydride compressor comprising:
• i) a plurality of metal hydride reservoirs comprising a metal hydride forming compound;
• c) an electrochemical-expander comprising:
• i) an anode;
• ii) a cathode;
• iii) an ionomer configured between and anode and cathode;
• d) a working fluid comprising hydrogen;
• e) a heating device that heats the plurality of metal hydride reservoir to move the working fluid from a first metal hydride reservoir at a first pressure to a second metal hydride reservoir at a second pressure;
• wherein the second pressure is higher than the first pressure;
• wherein the working fluid is passed to the electro-chemical-expander and wherein the hydrogen is transported from the anode to the cathode of the electro-chemical-expander to produce electricity;
• and
• f) a valve to control a flow of the working fluid from a first metal hydride reservoir to a second metal hydride reservoir of the plurality of metal hydride reservoirs.