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Dual Heteroatom-Doped Carbon Nanofoam-Wrapped Iron Monosulfide Nanoparticles: An Efficient Cathode Catalyst for Li-O-2 Batteries

Title
Dual Heteroatom-Doped Carbon Nanofoam-Wrapped Iron Monosulfide Nanoparticles: An Efficient Cathode Catalyst for Li-O-2 Batteries
Authors
Ramakrishnan, PrakashShanmugam, SangarajuKim, Jae Hyun
DGIST Authors
Ramakrishnan, Prakash; Shanmugam, SangarajuKim, Jae Hyun
Issue Date
2017-04
Citation
ChemSusChem, 10(7), 1554-1562
Type
Article
Article Type
Article
Keywords
Bi Functional CatalystsCatalyst SupportsCatalystsCathodesChalcogensChallengesCost EffectivenessDischarge CapacitiesElectric BatteriesElectrocatalystsElectrodesEnergy EfficiencyEnergy StorageEvolutionGrapheneHeteroatomsHigh Rate PerformanceIon BatteriesIron SulfideIron SulfidesLithiumLithium Air BatteriesLithium BatteriesLong LifeNano StructuresNanoparticlesNitrogenReversible FormationSecondary BatteriesSulfideSupported CatalystsTextural PropertiesX Ray Photoelectron Spectroscopy (XPS)
ISSN
1864-5631
Abstract
Cost-effective dual heteroatom-doped 3D carbon nanofoam-wrapped FeS nanoparticles (NPs), FeS-C, act as efficient bifunctional catalysts for Li–O2 batteries. This cathode exhibits a maximum deep discharge capacity of 14 777.5 mA h g−1 with a 98.1 % columbic efficiency at 0.1 mA cm−2. The controlled capacity (500 mA h g−1) test of this cathode delivers a minimum polarization gap of 0.73 V at 0.1 mA cm−2 and is sustained for 100 cycles with an energy efficiency of approximately 64 % (1st cycle) and 52 % (100th cycle) at 0.3 mA cm−2, under the potential window of 2.0–4.5 V. X-ray photoelectron spectroscopy reveals the substantial reversible formation and complete decomposition of Li2O2. The excellent recharging ability, high rate performance, and cycle stability of this catalyst is attributed to the synergistic effect of FeS catalytic behavior and textural properties of heteroatom-doped carbon nanostructures. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
URI
http://hdl.handle.net/20.500.11750/4044
DOI
10.1002/cssc.201601810
Publisher
Wiley-VCH Verlag
Related Researcher
Files:
There are no files associated with this item.
Collection:
Division of Nano∙Energy Convergence Research1. Journal Articles
Division of Nano∙Energy Convergence Research1. Journal Articles


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