Inkjet-printed transparent micro-supercapacitors with morphology tailored co-continuous mesoporous Mn3O4

Priyadarsini, SS and Saxena, S and Pradhan, JR and Dasgupta, S (2022) Inkjet-printed transparent micro-supercapacitors with morphology tailored co-continuous mesoporous Mn3O4. In: Journal of Materials Chemistry A .

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Abstract

Abstract High energy density, flexible supercapacitors typically use various carbon allotropes and 2-dimensional metals as the electrode material. As an alternative, here we report, fully printed, bendable and high-capacity micro-supercapacitors (MSCs) from large surface-to-volume ratio co-continuous mesoporous manganese oxide (Mn3O4). The printed 3-electrode supercapacitors have shown gravimetric capacitance as high as 1201 F g−1, whereas the printed and highly transparent micro-supercapacitors demonstrate a large potential window up to 2.6 V, and gravimetric and volumetric capacitances of 396 F g−1 and 1406 F cm−3 with printed aqueous solid polymer electrolytes and 679 F g−1 and 2411 F cm−3 with non-aqueous solid polymer electrolytes, respectively. The cyclic stability of these printed MSCs has been demonstrated up to 10 000 cycles with <2% reduction in initial capacitance. Flexible MSCs realized onto polyimide substrates also exhibit excellent gravimetric (653 F g−1) and volumetric (2317 F cm−3) capacitance, and no measurable performance degradation with bending fatigue tests performed down to the bending radius of 2.5 mm. In addition, the printed MSCs are found to be highly transparent with >90% transparency at 550 nm. The observed high energy density (353 W h kg−1), coupled with high transparency and adequate flexibility can make them ideally suitable for application in smart glasses and invisible electronics.

Item Type:	Journal Article
Publication:	Journal of Materials Chemistry A
Publisher:	Royal Society of Chemistry
Additional Information:	The copyright for this article belongs to Royal Society of Chemistry.
Keywords:	Bending tests; Capacitance; Electrodes; Fatigue testing; Flowcharting; Manganese oxide; Morphology; Polyelectrolytes; Solid electrolytes; Transparency, 2 - Dimensional; Carbon allotropes; Electrode material; Gravimetric capacitance; High capacity; Higher energy density; Ink jet; Mesoporous; Microsupercapacitors; Solid polymer electrolytes, Supercapacitor
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	10 Nov 2022 06:25
Last Modified:	10 Nov 2022 06:25
URI:	https://eprints.iisc.ac.in/id/eprint/77860

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