4.7 Article

Piezoelectric Inkjet Printing of Nanoporous Carbons for Micro-supercapacitor Devices

期刊

ACS APPLIED ENERGY MATERIALS
卷 4, 期 2, 页码 1560-1567

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsaem.0c02745

关键词

inkjet printing; micro-supercapacitor; porous carbon; 3D piezoelectric printer; cyclic voltammetry

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High-resolution interdigital micro-supercapacitor devices are produced by one-step printing of liquid carbon precursors based on renewable resources, offering high variability in design. The use of a hydrogel electrolyte and additional nitrogen doping results in stable structures with high capacitance retention. Piezoelectric-printed structures maintain a high capacitance retention of 96% after 10,000 cycles.
High-resolution interdigital micro-supercapacitor (MSC) devices are produced by one-step printing of liquid carbon precursors based on renewable resources. A piezo-driven micro-pipetting system allows precise positioning of the ink, offering a high degree of variability in terms of geometric supercapacitor designs. The printed precursor structures were directly converted into nanoporous carbon materials by pyrolysis at 900 degrees C. A hydrogel electrolyte based on PVA/H2SO4 was used to form quasi-solid-state MSCs. Stable structures with an ohmic serial resistance of around 540 Omega and capacitance up to 151 F cm(-3) (3.9 mF cm(-2)) could be produced via additional nitrogen doping of the nanoporous carbon. The capacitance retention of piezoelectric-printed structures after 10,000 cycles remains as high as 96%.

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