Chaotropic anion based “water-in-salt” electrolyte realizes a high voltage Zn-graphite dual-ion battery

0553418 - FZÚ 2023 RIV GB eng J - Journal Article
Zafar, Zahid Ali - Abbas, Ghulam - Knížek, Karel - Šilhavík, Martin - Kumar, Prabhat - Jiříček, Petr - Houdková, Jana - Frank, Otakar - Červenka, Jiří
Chaotropic anion based “water-in-salt” electrolyte realizes a high voltage Zn-graphite dual-ion battery.
Journal of Materials Chemistry A. Roč. 10, č. 4 (2022), s. 2064-2074. ISSN 2050-7488. E-ISSN 2050-7496
R&D Projects: GA MŠMT EF16_026/0008382; GA MŠMT(CZ) EF16_019/0000760; GA ČR GA19-23986S
Grant - others: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
Institutional support: RVO:68378271 ; RVO:61388955
Keywords : battery * water-in-salt electrolyte * zinc perchlorate * graphite * zinc
OECD category: Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis); Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis) (UFCH-W)
Impact factor: 11.9, year: 2022
Method of publishing: Limited access
https://doi.org/10.1039/d1ta10122f

This work realizes a high-voltage and low-cost aqueous Zn–graphite dual-ion battery based on a Zn(ClO4)2 water-in-salt electrolyte with a wide electrochemical window of 2.80 V. The implementation of the supersaturated Zn(ClO4)2 water-in-salt electrolyte containing strong chaotropic ClO4− anions expands the oxidative stability of the aqueous electrolyte beyond 1.65 V vs. Ag/AgCl or 2.60 V vs. Zn/Zn2+, and facilitates reversible plating/stripping of Zn2+ with a low overpotential of <50 mV at 1 mAcm−2 and a high upper cut-off potential of 2.5 V vs. Zn/Zn2+. Consequently, the Zn–graphite dual-ion battery delivers a maximum discharge capacity of 45 mAhg−1 at 100 mAg−1 with a mean discharge voltage of ∼1.95 V and cycle life of over 500 cycles.
Permanent Link: http://hdl.handle.net/11104/0330539