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Conceptual Membraneless Fuel Cell Device Based On Ionic Liquid|Water Interface
Author(s) -
Teixeira Santos Keyla,
Suffredini Hugo Barbosa,
Wittstock Gunther,
Angelucci Camilo Andrea
Publication year - 2021
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202100260
Subject(s) - electrolyte , ionic liquid , electrochemistry , interface (matter) , open circuit voltage , aqueous solution , chemical engineering , power density , fuel cells , electrode , chemistry , ion exchange , materials science , catalysis , voltage , ion , power (physics) , electrical engineering , thermodynamics , organic chemistry , engineering , gibbs isotherm , physics
Ionic liquids (ILs) are considered as a new‐generation electrolyte for electrochemical devices such as fuel cells. When in contact with water, ILs can form a liquid|liquid interface due to their hydrophobicity. This feature allows us to build a conceptual membraneless device for energy generation by combining the oxygen reduction and hydrogen oxidation reactions in acid aqueous electrolyte and in [Bmim][PF 6 ], respectively. The IL|water interface serves as an ion‐exchange interface, allowing the proton transfer between the phases. The open circuit voltage (OCV) between the two half‐cells( H 2 / H + ) I L( O 2 / H 2 O )H 2 Oachieves 1.34 V with a maximum power density of 0.7 μW cm −2 at room temperature. Changes in the pH show no influence in the Galvani potential difference resulted from the IL|water interface and in the( H 2 / H + ) I L ) half‐cell. Besides the relative low fuel cell power, the conceptual device has wide margin to improve, mainly in the cell design.