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Dual Heteroatom‐Doped Carbon Nanofoam‐Wrapped Iron Monosulfide Nanoparticles: An Efficient Cathode Catalyst for Li–O 2 Batteries
Author(s) -
Ramakrishnan Prakash,
Shanmugam Sangaraju,
Kim Jae Hyun
Publication year - 2017
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201601810
Subject(s) - heteroatom , materials science , catalysis , cathode , bifunctional , chemical engineering , x ray photoelectron spectroscopy , nanoparticle , carbon fibers , doping , nanotechnology , composite material , chemistry , organic chemistry , composite number , optoelectronics , ring (chemistry) , engineering
Cost‐effective dual heteroatom‐doped 3D carbon nanofoam‐wrapped FeS nanoparticles (NPs), FeS‐C, act as efficient bifunctional catalysts for Li–O 2 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 Li 2 O 2 . 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.