Flexible solid-state supercapacitor based on tin oxide/reduced graphene oxide/bacterial nanocellulose

Keng-Ku Liu; Qisheng Jiang; Clayton Kacica; Hamed Gholami Derami; Pratim Biswas; Srikanth Singamaneni

doi:10.1039/c8ra05270k

Flexible solid-state supercapacitor based on tin oxide/reduced graphene oxide/bacterial nanocellulose

RSC Adv. 2018 Sep 5;8(55):31296-31302. doi: 10.1039/c8ra05270k.

Authors

Keng-Ku Liu¹, Qisheng Jiang¹, Clayton Kacica², Hamed Gholami Derami¹, Pratim Biswas², Srikanth Singamaneni¹

Affiliations

¹ Department of Mechanical Engineering and Materials Science, Institute of Materials Science and Engineering, Washington University in St. Louis St Louis Missouri 63130 USA singamaneni@wustl.edu.
² Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis St Louis Missouri 63130 USA pbiswas@wustl.edu.

Abstract

We demonstrate a flexible and light-weight supercapacitor based on bacterial nanocellulose (BNC) incorporated with tin oxide (SnO₂) nanoparticles, graphene oxide (GO) and poly(3,4-ethylenedioxyiophene)-poly(styrenesulfonate) (PEDOT:PSS). The SnO₂ and GO flakes are introduced into the fibrous nanocellulose matrix during bacteria-mediated synthesis. The flexible PEDOT:PSS/SnO₂/rGO/BNC electrodes exhibited excellent electrochemical performance with a capacitance of 445 F g^-1 at 2 A g^-1 and outstanding cycling stability with 84.1% capacitance retention over 2500 charge/discharge cycles. The flexible solid-state supercapacitors fabricated using PEDOT:PSS/SnO₂/rGO/BNC electrodes and poly(vinyl alcohol) (PVA)-H₂SO₄ coated BNC as a separator exhibited excellent energy storage performance. The fabrication method demonstrated here is highly scalable and opens up new opportunities for the fabrication of flexible cellulose-based energy storage devices.