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Alkaline–Acid Zn–H 2 O Fuel Cell for the Simultaneous Generation of Hydrogen and Electricity
Author(s) -
Cai Pingwei,
Li Yan,
Wang Genxiang,
Wen Zhenhai
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201712765
Subject(s) - electrochemistry , power density , open circuit voltage , electricity generation , alkaline fuel cell , chemistry , hydrogen production , electricity , cell voltage , hydrogen , electrochemical energy conversion , fuel cells , voltage , chemical engineering , electrode , electrical engineering , power (physics) , organic chemistry , physics , anode , quantum mechanics , engineering , electrolyte
An alkaline–acid Zn–H 2 O fuel cell is proposed for the simultaneous generation of electricity with an open circuit voltage of about 1.25 V and production of H 2 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 H 2 production with an output voltage of 1.16 V at a current density of 10 mA cm −2 .