Flexible Films as Anode Materials Based on rGO and TiO 2 /MnO 2 in Li-Ion Batteries Free of Non-Active Agents

Tomasz Kędzierski, Daria Baranowska, Damian Bęben, Beata Zielińska, Xuecheng Chen and Ewa Mijowska
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Tomasz Kędzierski: Department of Nanomaterials Physicochemistry, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastów 45, 70-311 Szczecin, Poland
Daria Baranowska: Department of Nanomaterials Physicochemistry, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastów 45, 70-311 Szczecin, Poland
Damian Bęben: Nanores Sp. z o.o. Sp.k., Bierutowska 57-59, 51-317 Wrocław, Poland
Beata Zielińska: Department of Nanomaterials Physicochemistry, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastów 45, 70-311 Szczecin, Poland
Xuecheng Chen: Department of Nanomaterials Physicochemistry, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastów 45, 70-311 Szczecin, Poland
Ewa Mijowska: Department of Nanomaterials Physicochemistry, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastów 45, 70-311 Szczecin, Poland

Energies, 2021, vol. 14, issue 23, 1-15

Abstract: Recently, to meet the growing demand for stable and flexible batteries, anodes in the form of thin films have drawn the attention of researchers. It is clear that mass production of such batteries would bring the worldwide distribution of flexible devices and wearable electronics closer. Currently, electrodes are deposited on a flexible substrate and consist of conductive and binding agents that increase the volume/weight of the electrode. Here, we propose free-standing and non-active-material-free thin films based on reduced graphene oxide (rGO), titanium dioxide (TiO 2 ) and manganese dioxide (MnO 2 ) as working electrodes in lithium-ion half-cells prepared via the vacuum-assisted filtration method. The electrochemical performance of the assembled half-cells exhibited good cyclic stability and a reversible capacity at lower current densities. The addition of TiO 2 and MnO 2 improved the capacity of the rGO film, while rGO itself provided a stable rate performance. rGO/TiO 2 /MnO 2 film showed the highest discharge capacity (483 mAh/g at 50 mA/g). In addition, all assembled cells displayed excellent repeatability and reversibility in cyclic voltammetry measurements and good lithium-ion diffusion through the electrolyte, SEI layer and the active material itself.

Keywords: Li-ion batteries; thin-film growth; reduced graphene oxide; vacuum-assisted filtration (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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