Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 11, Pages 2909-2913Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201700148
Keywords
aqueous electrolytes; electrochemistry; hydronium ion batteries; PTCDA; structural dilation
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Funding
- American Chemical Society Petroleum Research Fund [PRF 55708-DNI10]
- National Science Foundation [ACI-1053575]
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We demonstrate for the first time that hydronium ions can be reversibly stored in an electrode of crystalline 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA). PTCDA exhibits a capacity of 85 mAhg(-1) at 1 Ag-1 after an initial conditioning process. Ex situ X-ray diffraction revealed reversible and significant structure dilation upon reduction of PTCDA in an acidic electrolyte, which can only be ascribed to hydronium-ion intercalation. The lattice expansion upon hydronium storage was theoretically explored by first-principles density functional theory (DFT) calculations, which confirmed the hydronium storage in PTCDA.
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