Effect of PEDOT:PSS Coating on Manganese Oxide Nanowires for Lithium Ion Battery Anodes

In Hwan Ko, Seong Jun Kim, Joohyun Lim, Seung-Ho Yu, Jihoon Ahn, Jin Kyu Lee, Yung Eun Sung

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Transition metal oxides have been considered as promising lithium storage materials that undergo a conversion reaction, exhibiting high specific capacity. However, capacity fading during cycling is the most serious obstacle for their commercialization. In order to overcome this, we have added PEDOT:PSS (poly(3,4-ethylenedioxythiophene) polystyrene sulfonate) to Mn 2 O 3 nanowires. PEDOT:PSS was successfully coated onto Mn 2 O 3 nanowires while maintaining the structure of Mn 2 O 3 . The coating of PEDOT:PSS reduced the resistance of the surface and protected the surface electron channels from the pulverization effect of the charge-discharge operation. α-Mn 2 O 3 /PEDOT:PSS showed excellent cyclability with a reversible capacity of 1450 mAh g -1 after 200 cycles at a current density of 100 mA g -1 . An increase in capacity was observed with continuous cycling, which may be attributed to further oxidation of the manganese species and a reversible reaction of the gel-like polymer on the manganese surface. The results demonstrate that PEDOT:PSS enhances the electrochemical activity by providing electron channels and prevents pulverization caused by the charge and discharge process.

Original languageEnglish
Pages (from-to)340-347
Number of pages8
JournalElectrochimica Acta
Volume187
DOIs
Publication statusPublished - 2016 Jan 1
Externally publishedYes

Keywords

  • abnormal capacity
  • capacity increasing
  • lithium ion battery
  • manganese oxide
  • PEDOT:PSS

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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