Natural Polymers for Green Supercapacitors

Giovanni Emanuele Spina, Federico Poli, Alessandro Brilloni, Daniele Marchese and Francesca Soavi
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Giovanni Emanuele Spina: Department of Chemistry “Giacomo Ciamician”, Alma Mater Studiorum Universita’ di Bologna, Via Selmi 2, 40126 Bologna, Italy
Federico Poli: Department of Chemistry “Giacomo Ciamician”, Alma Mater Studiorum Universita’ di Bologna, Via Selmi 2, 40126 Bologna, Italy
Alessandro Brilloni: Department of Chemistry “Giacomo Ciamician”, Alma Mater Studiorum Universita’ di Bologna, Via Selmi 2, 40126 Bologna, Italy
Daniele Marchese: Department of Chemistry “Giacomo Ciamician”, Alma Mater Studiorum Universita’ di Bologna, Via Selmi 2, 40126 Bologna, Italy
Francesca Soavi: Department of Chemistry “Giacomo Ciamician”, Alma Mater Studiorum Universita’ di Bologna, Via Selmi 2, 40126 Bologna, Italy

Energies, 2020, vol. 13, issue 12, 1-17

Abstract: Water-processable natural polymers represent a valuable alternative for the sustainable manufacturing of electrical double layer capacitors (EDLCs). Here, we demonstrate for the first time the feasibility of the use of pullulan to produce high mass loading electrodes (>10 mg cm −2 ) at low binder content (10%) for ionic-liquid based EDLCs. Pullulan has also been processed as a porous separator by electrospinning. Its ionic resistance and thermal stability have been evaluated in different electrolytes and were found to be superior compared to those of a cellulose triacetate electrospun separator. Pullulan-ionic liquid EDLCs were, thus, assembled and charged up to 3.2 V. The EDLCs delivered specific energy and power of 7.2 Wh kg −1 and 3.7 kW kg −1 and featured good cycling stability over 5000 cycles.

Keywords: green supercapacitor; water processable polymer; pullulan; ionic liquid; electrospinning (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: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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