Decoration of MnO Nanocrystals on Flexible Freestanding Carbon Nanofibers for Lithium Ion Battery Anodes

Edmund Samuel, Hong Seok Jo, Bhavana Joshi, Seongpil An, Hyun Goo Park, Yong Il Kim, Wooyoung Yoon, Suk Goo Yoon

Research output: Contribution to journalArticle

31 Citations (Scopus)

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·g−1 and a retention capacity of 923 mAh·g−1 after 90 charge-discharge cycles under a current rate of 123 mA·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.

Original languageEnglish
Pages (from-to)582-589
Number of pages8
JournalElectrochimica Acta
Volume231
DOIs
Publication statusPublished - 2017 Mar 20

Keywords

  • Carbon nanofiber
  • Electrospun nanofiber
  • Felxible
  • Freestanding
  • Lithium battery anode
  • MnO

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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