Inkjet-printed energy storage device using graphene/polyaniline inks

• Published in: Journal of power sources Vol. 248; pp. 483 - 488
• Main Authors: YANFEI XU, HENNIG, Ingolf, FREYBERG, Dieter, STRUDWICK, Andrew James, SCHWAB, Matthias Georg, WEITZ, Thomas, CHA, Kitty Chih-Pei
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier 2014
• Subjects: Applied sciences; Capacitors; Capacitors. Resistors. Filters; Coatings. Paints, varnishes and inks; Density; Electrical engineering. Electrical power engineering; Electrodes; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Graphene; Inkjet printing; Inks; Polyanilines; Polymer industry, paints, wood; Supercapacitors; Transport and storage of energy; Various equipment and components; Industrial applicability; Ink; Thin-film electrode; Electrolytic capacitor; Conducting polymers; Graphene; Thin layer electrode; Graphene/polyaniline ink; Supercapacitor; Inkjet printing; Ink jet printing; Energy storage; Aniline polymer
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2013.09.096

In this work, graphene/polyaniline (NGP/PANI) inks are formulated; inkjet printing technology is then used to produce NGP/PANI thin-film electrodes from these inks. With this inkjet printing, good control over a number of key film properties including pattern geometry, pattern location, film thickness, and electrical conductivity is achieved. Two-electrode supercapacitors are fabricated using these thin-film electrodes. Electrochemical measurements with a 1 M H2SO4 electrolyte yield a maximum specific capacitance of 82 F g-1, power density of 124 kW kg-1 and energy density of 2.4 Wh kg-1 when a scan rate of 20 mV s-1 is applied. The supercapacitors show a long cycle life over 1000 cycles.