Iron-cobalt bimetal decorated carbon nanotubes as cost-effective cathode catalysts for Li-O-2 batteries

Title
Iron-cobalt bimetal decorated carbon nanotubes as cost-effective cathode catalysts for Li-O-2 batteries
Author
선양국
Keywords
LITHIUM-OXYGEN BATTERIES; REDUCED GRAPHENE OXIDE; AIR BATTERIES; PERFORMANCE; ELECTRODE; NANOPARTICLES; COMPOSITE; CELLS
Issue Date
2016-05
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v. 4, NO 18, Page. 7020-7026
Abstract
Despite the extremely high theoretical specific capacity of lithium oxygen (Li-O-2) electrochemistry, low energy efficiency resulting from the large potential gap between the discharge and charge makes this system impractical. In this report, an iron cobalt bimetal decorated carbon nanotube (FeCo-CNT) composite was synthesized as a catalytic air cathode material for Li-O-2 batteries. An Li-O-2 battery using FeCo-CNT air electrodes exhibited higher efficiency (72.15%) than that of pristine CNTs (62.57%) as well as higher capacity (3600 mA h g(-1) vs. 1276 mA h g(-1)). Spectroscopic and electron microscopy analyses showed that the improved cell performances can be attributed to the catalytic effect of FeCo. As cost-effective non-noble metal catalysts, FeCo-CNTs demonstrated performance comparable to noble metal catalysts in Li-O-2 systems.
URI
http://pubs.rsc.org/en/Content/ArticleLanding/2016/TA/C5TA10550A#!divAbstracthttp://repository.hanyang.ac.kr/handle/20.500.11754/71080
ISSN
2050-7488; 2050-7496
DOI
10.1039/c5ta10550a
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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