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Development of graphene oxide/polyaniline inks for high performance flexible microsupercapacitors via extrusion printing

journal contribution
posted on 2018-05-01, 00:00 authored by Y Liu, B Zhang, Q Xu, Y Hou, Shayan Seyedin, Alex QinAlex Qin, G G Wallace, S Beirne, Joselito RazalJoselito Razal, J Chen
Extrusion printing of interdigitated electrodes for flexible microsupercapacitors (fMSCs) offers an attractive route to the fabrication of flexible devices where cost, scalability, and processability of ink formulations are critical. In this work, highly concentrated, viscous, and water-dispersible inks are developed based on graphene oxide (GO)/polyaniline (PANi) composite for extrusion printing. The optimized GO/PANi-based all-solid-state symmetric fMSCs obtained by extrusion printing interdigitated microelectrodes can deliver outstanding areal capacitance of 153.6 mF cm−2and volumetric capacitance of 19.2 F cm−3at 5 mV s−1. It is shown that by fabricating asymmetric fMSCs using the GO/PANi as positive electrode and a graphene-based negative electrode, the voltage window can be widened from 0.8 to 1.2 V and improvements can be achieved in energy density (from 3.36 to 4.83 mWh cm−3), power density (from 9.82 to 25.3 W cm−3), and cycling stability (from 75% to 100% capacitance retention over 5000 cycles) compared with the symmetric counterpart. The simple ink preparation and facile device fabrication protocols reported here make the scalable fabrication of extrusion printed fMSCs a promising technology.

History

Journal

Advanced functional materials

Volume

28

Issue

21

Article number

1706592

Pagination

1 - 12

Publisher

Wiley

Location

Chichester, Eng.

ISSN

1616-301X

eISSN

1616-3028

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2018, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim