Results
Title

A Non‐aqueous H<sub>3</sub>PO<sub>4</sub> Electrolyte Enables Stable Cycling of Proton Electrodes.

Authors

Xu, Yunkai; Wu, Xianyong; Jiang, Heng; Tang, Longteng; Koga, Kenneth Y.; Fang, Chong; Lu, Jun; Ji, Xiulei

Abstract

A non‐aqueous proton electrolyte is devised by dissolving H3PO4 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.

Subjects

AQUEOUS electrolytes; PROTONS; ELECTROLYTES; OXYGEN evolution reactions; ELECTRODES; CYCLING competitions

Publication

Angewandte Chemie, 2020, Vol 132, Issue 49, p22191

ISSN

0044-8249

Publication type

Academic Journal

DOI

10.1002/ange.202010554