Issue 40, 2022

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

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.

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

Supplementary files

Article information

Article type
Paper
Submitted
20 jun. 2022
Accepted
13 sep. 2022
First published
13 sep. 2022

J. Mater. Chem. A, 2022,10, 21551-21564

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

S. S. Priyadarsini, S. Saxena, J. R. Pradhan and S. Dasgupta, J. Mater. Chem. A, 2022, 10, 21551 DOI: 10.1039/D2TA04901E

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