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A bi-functional metal-free catalyst composed of dual-doped graphene and mesoporous carbon for rechargeable lithium-oxygen batteries

Title
A bi-functional metal-free catalyst composed of dual-doped graphene and mesoporous carbon for rechargeable lithium-oxygen batteries
Author
김동원
Keywords
GLYCOL DIETHYL-ETHER; LI-AIR BATTERIES; REDUCTION REACTION; LI-O-2 BATTERIES; RECENT PROGRESS; NITROGEN; ELECTROCATALYSTS; SULFUR; ELECTROLYTES; PERFORMANCE
Issue Date
2015-09
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v. 3, NO 36, Page. 18456-18465
Abstract
Mesoporous carbon on nitrogen and sulfur co-doped graphene nanosheets (NSGC) was synthesized and its bi-functional catalytic activity toward oxygen reduction reaction and oxygen evolution reaction was investigated. The NSGC material showed high bi-functional catalytic activity due to the synergistic effect of co-doping of sulfur and nitrogen, as well as the presence of a hierarchical porous structure. The enhanced bi-functional catalytic activity of NSGC facilitated the efficient formation and decomposition of Li2O2 on the air cathode. The lithium-oxygen cell assembled with the NSGC-based air cathode delivered a high initial discharge capacity of 11 431 mA h g(-1) and exhibited good cycling stability. The hybrid structure consisting of mesoporous carbon with co-doped graphene nanosheets can be an effective strategy to improve the round-trip efficiency and cycle life of lithium-oxygen batteries.
URI
http://pubs.rsc.org/en/Content/ArticleLanding/2015/TA/C5TA05334J#!divAbstracthttp://hdl.handle.net/20.500.11754/27386
ISSN
2050-7488; 2050-7496
DOI
10.1039/c5ta05334j
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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