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A Non‐aqueous H 3 PO 4 Electrolyte Enables Stable Cycling of Proton Electrodes
Author(s) -
Xu Yunkai,
Wu Xianyong,
Jiang Heng,
Tang Longteng,
Koga Kenneth Y.,
Fang Chong,
Lu Jun,
Ji Xiulei
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202010554
Subject(s) - electrolyte , faraday efficiency , aqueous solution , dissolution , protonation , proton , chemistry , rapid cycling , raman spectroscopy , acetonitrile , inorganic chemistry , electrode , electrochemistry , ion , analytical chemistry (journal) , chromatography , organic chemistry , physics , cognition , quantum mechanics , neuroscience , bipolar disorder , optics , biology
A non‐aqueous proton electrolyte is devised by dissolving H 3 PO 4 into acetonitrile. The electrolyte exhibits unique vibrational signatures from stimulated Raman spectroscopy. Such an electrolyte exhibits unique characteristics compared to aqueous acidic electrolytes: 1) higher (de)protonation potential for a lower desolvation energy of protons, 2) better cycling stability by dissolution suppression, and 3) higher Coulombic efficiency owing to the lack of oxygen evolution reaction. Two non‐aqueous proton full cells exhibit better cycling stability, higher Coulombic efficiency, and less self‐discharge compared to the aqueous counterpart.