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Gel Polymer Electrolytes with Talc as a Natural Mineral Filler and a Biodegradable Polymer Matrix in Sodium-Ion Batteries |
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| Authors: | Dr Agnieszka Swiderska-Mocek Izabela Karczewska Dr Agnieszka Gabryelczyk Dr Miko?aj Pop?awski Prof?Dr Dorota Czarnecka-Komorowska |
| Institution: | 1. Institute of Chemistry and Technical Electrochemistry, Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland;2. Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland
Contribution: ?Investigation (equal);3. Institute of Materials Science and Engineering, Poznan University of Technology, Jana Pawla II 24, 60-965 Poznan, Poland Contribution: ?Investigation (equal);4. Institute of Materials Technology, Poznan University of Technology, Piotrowo 3, 60-965 Poznan, Poland |
| Abstract: | A gel polymer electrolyte based on poly(vinyl alcohol) (PVA) is used in sodium-ion batteries (SIBs). The use of biodegradable and water-soluble polymer potentially reduces the negative environmental impact. The other components include sodium salt (NaPF6), sulfolane (TMS) as a plasticizer and talc. For the first time, natural and abundant talc has been used as an inert filler in a gel polymer electrolyte. The best results were obtained for moderate amounts of filler (1 and 3 wt%). Then, an increase in the conductivity, transference numbers, and thermal stability of the membranes was observed. Moreover, the presence of talc had a positive effect on the cyclability of the hard carbon electrode. The discharge capacity after 50 cycles of HC|1 % T_TMS|Na and HC|3 % T_TMS|Na was 243 and 225 mAh g?1, respectively. The use of talc in gel polymer electrolytes containing sodium ions improves the safety and efficiency of SIBs. |
| Keywords: | gel polymer electrolyte talc poly(vinyl alcohol) hard carbon sodium |