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A stable TiO$_{2}$–graphene nanocomposite anode with high rate capability for lithium-ion batteries

Farooq, Umer; Ahmed, Faheem; Pervez, Syed Atif; Rehman, Sarish; Pope, Michael A.; Fichtner, Maximilian; Roberts, Edward P. L.

Abstract:
A rapid microwave hydrothermal process is adopted for the synthesis of titanium dioxide and reduced graphene oxide nanocomposites as high-performance anode materials for Li-ion batteries. With the assistance of hydrazine hydrate as a reducing agent, graphene oxide was reduced while TiO$_{2}$ nanoparticles were grown in situ on the nanosheets to obtain the nanocomposite material. The morphology of the nanocomposite obtained consisted of TiO$_{2}$ particles with a size of ∼100 nm, uniformly distributed on the reduced graphene oxide nanosheets. The as-prepared TiO$_{2}$–graphene nanocomposite was able to deliver a capacity of 250 mA h g−1 ± 5% at 0.2C for more than 200 cycles with remarkably stable cycle life during the Li+ insertion/extraction process. In terms of high rate capability performance, the nanocomposite delivered discharge capacity of ca. 100 mA h g−1 with >99% coulombic efficiency at C-rates of up to 20C. The enhanced electrochemical performance of the material in terms of high rate capability and cycling stability indicates that the as-developed TiO$_{2}$–rGO nanocomposites are promising electrode materials for future Li-ion batteries.

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Verlagsausgabe §
DOI: 10.5445/IR/1000124536
Veröffentlicht am 13.10.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2046-2069
KITopen-ID: 1000124536
Erschienen in RSC Advances
Band 10
Heft 50
Seiten 29975–29982
Nachgewiesen in Scopus
Web of Science
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