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Reduced Graphene Oxide-Polypyrrole Composite as a Catalyst for Oxygen Electrode of High Rate Rechargeable Li-O2 Cells
被引:21
作者:

Selvaraj, C.
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Indian Inst Sci, Dept Inorgan & Phys Chem, Bangalore 560012, Karnataka, India Indian Inst Sci, Dept Inorgan & Phys Chem, Bangalore 560012, Karnataka, India

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Munichandraiah, N.
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Indian Inst Sci, Dept Inorgan & Phys Chem, Bangalore 560012, Karnataka, India Indian Inst Sci, Dept Inorgan & Phys Chem, Bangalore 560012, Karnataka, India

Scanlon, L. G.
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Air Force Res Lab, Elect Syst Branch, Wright Patterson AFB, OH 45433 USA Indian Inst Sci, Dept Inorgan & Phys Chem, Bangalore 560012, Karnataka, India
机构:
[1] Indian Inst Sci, Dept Inorgan & Phys Chem, Bangalore 560012, Karnataka, India
[2] Air Force Res Lab, Elect Syst Branch, Wright Patterson AFB, OH 45433 USA
关键词:
AIR ELECTRODE;
NANOSHEETS;
PERFORMANCE;
REDUCTION;
NANOWIRES;
D O I:
10.1149/2.055404jes
中图分类号:
O646 [电化学、电解、磁化学];
学科分类号:
081704 ;
摘要:
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.
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页码:A554 / A560
页数:7
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