Reduced Graphene Oxide-Polypyrrole Composite as a Catalyst for Oxygen Electrode of High Rate Rechargeable Li-O-2 Cells

Selvaraj, C and Kumar, Surender and Munichandraiah, N and Scanlon, LG (2014) Reduced Graphene Oxide-Polypyrrole Composite as a Catalyst for Oxygen Electrode of High Rate Rechargeable Li-O-2 Cells. In: JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 161 (4). A554-A560.

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Abstract

Polypyrrole (PPY) is grown on reduced graphene oxide (RGO) and the composite is studied as a catalyst for O-2 electrode in Li-O-2 cells. PPY is uniformly distributed on the two dimensional RGO layers. Li-O-2 cells assembled in a non-aqueous electrolyte using RGO-PPY catalyst exhibit an initial discharge capacity as high as 3358 mAh g(-1) (3.94 mAh cm(-2)) at a current density of 0.3 mA cm(-2). The voltage gap between the charge and discharge curves is less for Li-O-2(RGO-PPY) cell in comparison with Li-O-2(RGO) cell. The Li-O-2(RGO-PPY) cell delivers a discharge capacity of 550 mAh g(-1) (0.43 mAh cm(-2)) at a current density of 1.0 mA cm(-2). The results suggest that RGO-PPY is a promising catalyst of O-2 electrode for high rate rechargeable Li-O-2 cells. (C) 2014 The Electrochemical Society. All rights reserved.

Item Type:	Journal Article
Publication:	JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Publisher:	ELECTROCHEMICAL SOC INC
Additional Information:	Copyright for this article belongs to the ELECTROCHEMICAL SOC INC, USA
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	19 May 2014 05:21
Last Modified:	19 May 2014 05:21
URI:	http://eprints.iisc.ac.in/id/eprint/49057

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