Volume 33, Issue 1 pp. 27-37
Full Paper

Liquid-Crystal-Mediated Self-Assembly of Porous α-Fe2O3 Nanorods on PEDOT:PSS-Functionalized Graphene as a Flexible Ternary Architecture for Capacitive Energy Storage

Md. Monirul Islam

Md. Monirul Islam

Institute for Superconducting and Electronic Materials (ISEM), Australian Institute for Innovative Materials (AIIM) Facility, Innovation Campus, University of Wollongong, North Wollongong, NSW, 2500 Australia

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Dean Cardillo

Dean Cardillo

Institute for Superconducting and Electronic Materials (ISEM), Australian Institute for Innovative Materials (AIIM) Facility, Innovation Campus, University of Wollongong, North Wollongong, NSW, 2500 Australia

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Taslima Akhter

Taslima Akhter

Institute for Superconducting and Electronic Materials (ISEM), Australian Institute for Innovative Materials (AIIM) Facility, Innovation Campus, University of Wollongong, North Wollongong, NSW, 2500 Australia

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Seyed Hamed Aboutalebi

Seyed Hamed Aboutalebi

Institute for Superconducting and Electronic Materials (ISEM), Australian Institute for Innovative Materials (AIIM) Facility, Innovation Campus, University of Wollongong, North Wollongong, NSW, 2500 Australia

Present address: Condensed Matter National Laboratory, Institute for Research in Fundamental Sciences, 19395-5531, Tehran, Iran

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Hua Kun Liu

Hua Kun Liu

Institute for Superconducting and Electronic Materials (ISEM), Australian Institute for Innovative Materials (AIIM) Facility, Innovation Campus, University of Wollongong, North Wollongong, NSW, 2500 Australia

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Konstantin Konstantinov

Corresponding Author

Konstantin Konstantinov

Institute for Superconducting and Electronic Materials (ISEM), Australian Institute for Innovative Materials (AIIM) Facility, Innovation Campus, University of Wollongong, North Wollongong, NSW, 2500 Australia

E-mail: [email protected]Search for more papers by this author
Shi Xue Dou

Shi Xue Dou

Institute for Superconducting and Electronic Materials (ISEM), Australian Institute for Innovative Materials (AIIM) Facility, Innovation Campus, University of Wollongong, North Wollongong, NSW, 2500 Australia

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First published: 30 November 2015
Citations: 21

Abstract

A novel aqueous-based self-assembly approach to a composite of iron oxide nanorods on conductive-polymer (CP)-functionalized, ultralarge graphene oxide (GO) liquid crystals (LCs) is demonstrated here for the fabrication of a flexible hybrid material for charge capacitive application. Uniform decoration of α-Fe2O3 nanorods on a poly(3,4-ethylene-dioxythiophene): poly(styrenesulfonate) (PEDOT:PSS)-functionalized, ultralarge GO scaffold results in a 3D interconnected layer-by-layer (LBL) architecture. This advanced interpenetrating network of ternary components is lightweight, foldable, and possesses highly conductive pathways for facile ion transportation and charge storage, making it promising for high-performance energy-storage applications. Having such structural merits and good synergistic effects, the flexible architecture exhibits a high specific discharge capacitance of 875 F g−1 and excellent volumetric specific capacitance of 868 F cm−3 at 5 mV s−1, as well as a promising energy density of 118 W h kg−1 (at 0.5 A g−1) and promising cyclability, with capacity retention of 100% after 5000 charge–discharge (CD) cycles. This synthesis method provides a simple, yet efficient approach for the solution-processed LBL insertion of the hematite nanorods (HNR) into CP-functionalized novel composite structure. It provides great promise for the fabrication of a variety of metal-oxide (MO)-nanomaterial-based binder and current collector-free flexible composite electrodes for high-performance energy-storage applications.

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