Chemical Preintercalation of H2V3O8-reduced Graphene Oxide Composites for Improved Na- and Li-ion Battery Cathodes

Daniela Söllinger, Thomas Berger, Günther Redhammer, Jürgen Schoiber, Simone Pokrant*

*Korrespondierende/r Autor/-in für diese Arbeit

Publikation: Beitrag in FachzeitschriftArtikelPeer-reviewed

Abstract

Due to a growing demand for sustainable electrical energy storage alternatives to Li-ion batteries (LIBs), Na-ion batteries (SIBs) are of great interest because of the abundance of Na +. By modifying layered H 2V 3O 8 by preintercalation and composite formation, improved electrochemical properties were obtained in LIBs. In analogy, a scalable soft chemistry synthesis is developed, to chemically presodiate H 2V 3O 8 for the first time, in addition to a composite formation reaction with reduced graphene oxide (rGO). Crystal structure and morphology of all compounds are determined and their electrochemical properties as cathode are evaluated with respect to both Na + and Li + intercalation. The combination of preintercalation and composite formation leads to excellent initial capacities of 96 mAh ⋅ g −1 for SIBs and 371 mAh ⋅ g −1 for LIBs (58 % and 48 % higher than unmodified H 2V 3O 8) at a practical current density of 100 mA ⋅ g −1, demonstrating that H 2V 3O 8 is a promising cathode material for SIBs and LIBs.

OriginalspracheEnglisch
Seiten (von - bis)4223-4232
Seitenumfang10
FachzeitschriftChemElectroChem
Jahrgang8
Ausgabenummer22
Frühes Online-Datum2021
DOIs
PublikationsstatusVeröffentlicht - 12 Nov. 2021

Bibliographische Notiz

Funding Information:
The authors gratefully acknowledge M. Suljic for nitrogen sorption measurements and G. Tippelt for X-ray diffraction measurements.

Publisher Copyright:
© 2021 The Authors. ChemElectroChem published by Wiley-VCH GmbH

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