Alkaline–Acid Zn–H2O Fuel Cell for the Simultaneous Generation of Hydrogen and Electricity
An alkaline–acid Zn–H2O fuel cell is proposed for the simultaneous generation of electricity
with an open circuit voltage of about 1.25 V and production of H2 with almost 100% Faradic
efficiency. We demonstrate that, as a result of harvesting energy from both electrochemical
neutralization and electrochemical Zn oxidation, the as‐developed hybrid cell can deliver a
power density of up to 80 mW cm− 2 and an energy density of 934 Wh kg− 1 and maintain
long‐term stability for H2 production with an output voltage of 1.16 V at a current density of …
with an open circuit voltage of about 1.25 V and production of H2 with almost 100% Faradic
efficiency. We demonstrate that, as a result of harvesting energy from both electrochemical
neutralization and electrochemical Zn oxidation, the as‐developed hybrid cell can deliver a
power density of up to 80 mW cm− 2 and an energy density of 934 Wh kg− 1 and maintain
long‐term stability for H2 production with an output voltage of 1.16 V at a current density of …
Abstract
An alkaline–acid Zn–H2O fuel cell is proposed for the simultaneous generation of electricity with an open circuit voltage of about 1.25 V and production of H2 with almost 100 % Faradic efficiency. We demonstrate that, as a result of harvesting energy from both electrochemical neutralization and electrochemical Zn oxidation, the as‐developed hybrid cell can deliver a power density of up to 80 mW cm−2 and an energy density of 934 Wh kg−1 and maintain long‐term stability for H2 production with an output voltage of 1.16 V at a current density of 10 mA cm−2.
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