Nanoconfinement of low-conductivity products in rechargeable sodium-air batteries

Title
Nanoconfinement of low-conductivity products in rechargeable sodium-air batteries
Authors
윤종승
Keywords
Na-air battery; Porous carbon material; Discharge product morphology; Size-confinement; Carbonate-based electrolyte
Issue Date
2015-03
Publisher
ELSEVIER SCIENCE BV
Citation
NANO ENERGY, v. 12, Page. 123-130
Abstract
To alleviate the high polarization and short cycle lifetime of rechargeable Na-air batteries, ordered mesoporous carbon (OMC) was synthesized and evaluated as a nanostructured conductive matrix to host low-conductivity products generated during the discharge of Na-air batteries. The OMC had high specific surface area (1544 m(2)/g) and a narrow pore size (2.7 nm), with the voltage polarization of 1.5 V, lower than that of the commonly used Super P carbon black (-1.8 V). Although the carbonate-based electrolyte was decomposed to produce Na2CO3, the OMC cathode allowed reversible formation and decomposition of Na2CO3 and exhibited stable cycling behavior with low polarization for 20 cycles with a delivered capacity of 500 mAh/g at the current density of 100 mA/g. (C) 2015 Elsevier Ltd. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S221128551400264Xhttp://hdl.handle.net/20.500.11754/23297
ISSN
2211-2855; 2211-3282
DOI
http://dx.doi.org/10.1016/j.nanoen.2014.11.057
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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