The Effects of Ultrasound Treatment of Graphite on the Reversibility of the (De)Intercalation of an Anion from Aqueous Electrolyte Solution

0563647 - ÚFCH JH 2023 RIV CH eng J - Článek v odborném periodiku
Abbas, Ghulam - Zafar, Zahid Ali - Farjana, Jaishmin Sonia - Knížek, Karel - Houdková, Jana - Jiříček, Petr - Kalbáč, Martin - Červenka, Jiří - Frank, Otakar
The Effects of Ultrasound Treatment of Graphite on the Reversibility of the (De)Intercalation of an Anion from Aqueous Electrolyte Solution.
Nanomaterials. Roč. 12, č. 22 (2022), č. článku 3932. E-ISSN 2079-4991
Grant CEP: GA ČR GA19-23986S; GA MŠMT EF16_026/0008382; GA MŠMT(CZ) EF16_019/0000760
Grant ostatní: Ministerstvo školství, mládeže a tělovýchovy - GA MŠk(CZ) 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
Výzkumná infrastruktura: CzechNanoLab - 90110
Institucionální podpora: RVO:61388955 ; RVO:68378271
Klíčová slova: ultrasonication * graphite * intercalation
Obor OECD: Physical chemistry; Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis) (FZU-D)
Impakt faktor: 5.3, rok: 2022
Způsob publikování: Open access

Low cycling stability is one of the most crucial issues in rechargeable batteries. Herein, we study the effects of a simple ultrasound treatment of graphite for the reversible (de)intercalation of a ClO4− anion from a 2.4 M Al(ClO4)3 aqueous solution. We demonstrate that the ultrasound-treated graphite offers the improved reversibility of the ClO4− anion (de)intercalation compared with the untreated samples. The ex situ and in situ Raman spectroelectrochemistry and X-ray diffraction analysis of the ultrasound-treated materials shows no change in the interlayer spacing, a mild increase in the stacking order, and a large increase in the amount of defects in the lattice accompanied by a decrease in the lateral crystallite size. The smaller flakes of the ultrasonicated natural graphite facilitate the improved reversibility of the ClO4− anion electrochemical (de)intercalation and a more stable electrochemical performance with a cycle life of over 300 cycles.
Trvalý link: https://hdl.handle.net/11104/0335550