Reversible anion intercalation into graphite from aluminum perchlorate “water‐in‐salt” electrolyte

0556263 - FZÚ 2023 RIV GB eng J - Článek v odborném periodiku
Zafar, Zahid Ali - Abbas, Ghulam - Šilhavík, Martin - Knížek, Karel - Kaman, Ondřej - Farjana, Jaishmin Sonia - Kumar, Prabhat - Jiříček, Petr - Houdková, Jana - Frank, Otakar - Červenka, Jiří
Reversible anion intercalation into graphite from aluminum perchlorate “water‐in‐salt” electrolyte.
Electrochimica acta. Roč. 404, Feb. (2022), č. článku 139754. ISSN 0013-4686. E-ISSN 1873-3859
Grant CEP: GA MŠMT EF16_026/0008382; GA MŠMT(CZ) EF16_019/0000760; GA ČR GA19-23986S
Grant ostatní: OP VVV - CARAT CZ.02.1.01/0.0/0.0/16_026/0008382; OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760; AV ČR(CZ) StrategieAV21/6
Program: StrategieAV
Institucionální podpora: RVO:68378271 ; RVO:61388955
Klíčová slova: electrochemical potential window * water-in-salt electrolyte * aluminium perchlorate
Obor OECD: Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis); Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis) (UFCH-W)
Impakt faktor: 6.6, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1016/j.electacta.2021.139754

We demonstrate a highly concentrated “water-in-salt” electrolyte of aluminum perchlorate that demonstrates a wide electrochemical stability window of 4.0 V. The “water-in-salt” electrolyte suppresses the dissociation of water at high potentials, facilitating a stable and reversible perchlorate (ClO4−) anion intercalation into the graphite with a Coulombic efficiency of over 95% for more than 2000 cycles. The structural and chemical changes of the anion-intercalated graphite are studied by Operando Raman, Operando X-ray diffraction, and X-ray photoelectron spectroscopy. Our study provides an insight into ClO4− anion intercalation into graphite in the supersaturated aluminum perchlorate “water-in-salt” electrolyte, demonstrating a suitable platform for future high-voltage aqueous energy storage systems.
Trvalý link: http://hdl.handle.net/11104/0330554