Electrospun nanotubular titania and polymeric interfaces for high energy density li-ion electrodes

Charkhesht, Vahid and Yarar Kaplan, Begüm and Alkan Gürsel, Selmiye and Yürüm, Alp (2023) Electrospun nanotubular titania and polymeric interfaces for high energy density li-ion electrodes. Energy and Fuels, 37 (8). pp. 6197-6207. ISSN 0887-0624 (Print) 1520-5029 (Online)

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In the current study, for the first time, electrospinning of nanotubular structures was developed for Li-ion battery high energy density applications. For this purpose, titania-based nanotubular materials were synthesized and characterized. Before electrospinning with PVDF to obtain a self-standing electrode, the nanotubes were modified to obtain the best charge-transferring structure. In the current study, for the first time, the effects of various thermal treatment temperatures and durations under an Ar-controlled atmosphere were investigated for Li+ diffusion. Electrochemical impedance spectroscopy, cyclic voltammograms, and galvanostatic intermittent titration technique showed that the fastest charge transfer kinetics belongs to the sample treated for 10 h. After optimization of electrospinning parameters, a fully nanotube-embedded fibrous structure was achieved and confirmed by scanning electron microscopy and transmission electron microscopy. The obtained flexible electrode was pressed at ambient and 80 °C to improve the fiber volume fraction. Finally, the galvanostatic charge/discharge tests for the electrospun electrode after 100 cycles illustrated that the hot-pressed sample showed the highest capacity. The polymeric network enabled the omission of metallic current collectors, thus increasing the energy density by 14%. The results of electrospun electrodes offer a promising structure for future high-energy applications.
Item Type: Article
Divisions: Faculty of Engineering and Natural Sciences
Sabancı University Nanotechnology Research and Application Center
Depositing User: Alp Yürüm
Date Deposited: 05 Aug 2023 14:59
Last Modified: 05 Aug 2023 14:59
URI: https://research.sabanciuniv.edu/id/eprint/47139

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