Decoration of MnO Nanocrystals on Flexible Freestanding Carbon Nanofibers for Lithium Ion Battery Anodes
- Authors
- Samuel, Edmund; Jo, Hong Seok; Joshi, Bhavana; An, Seongpil; Park, Hyun Goo; Kim, Yong Il; Yoon, Woo Young; Yoon, Sam S.
- Issue Date
- 20-3월-2017
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Electrospun nanofiber; MnO; Freestanding; Felxible; Carbon nanofiber; Lithium battery anode
- Citation
- ELECTROCHIMICA ACTA, v.231, pp.582 - 589
- Indexed
- SCIE
SCOPUS
- Journal Title
- ELECTROCHIMICA ACTA
- Volume
- 231
- Start Page
- 582
- End Page
- 589
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/84131
- DOI
- 10.1016/j.electacta.2017.02.077
- ISSN
- 0013-4686
- Abstract
- We demonstrate the fabrication of freestanding and flexible MnO-decorated carbon nanofiber (CNF) composites as lithium-ion battery anode materials. They showed an initial capacity of 1131 mAh center dot g (1) and a retention capacity of 923 mAh center dot g (1) after 90 charge-discharge cycles under a current rate of 123 mA center dot g (1). Decoration of MnO nanocrystals on the CNFs enhanced the lithium storage capacity of the composites. The optimal concentration of MnO was identified by varying its weight percentage from 0 to 7%. When the concentration was increased, more reaction sites for lithium ions were formed, which in turn increased the overall specific capacity. The intensity of the D band in the Raman spectra of the decorated CNFs was higher than that of the G band, indicating the enhanced diffusion of lithium ions. The plateau region of the discharge curve observed in the cases of higher MnO concentrations indicated the active reduction of MnO; consequently, a higher reversible capacity was achieved. These flexible and freestanding MnO-CNF nanocomposites can be used in lightweight, portable, and flexible batteries. (C) 2017 Elsevier Ltd. All rights reserved.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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