Improved stability of lithium-ion battery cathodes using conducting polymer binders

Hyun Deok Lee, Gyu Jin Jung, Ho Seok Lee, Tae Young Kim, Jae Dong Byun, Kwang Suck Suh

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Lithium-nickel-manganese-cobalt oxide (LiNixCoyMnzO2) (NCM) has a high specific capacity and is used as a cathode material for Li-ion batteries. However, the poor cycling stability associated with NCM-based cathode composites imposes a challenge for achieving stable cycling performance. Here, we report the use of a conducting polymer as a binder to yield a stable NCM-based cathode composite. Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) was successfully used with a NCM cathode material, resulting in many advantages, such as improved electrical conductivity within the electrode and strong adhesion of the electrode composite on the current collector. With PEDOT:PSS binder, the NCM-based cathodes showed stable cycling performance and an improved capacity retention of ~85% after 100 cycles at 45°C.

Original languageEnglish
Pages (from-to)84-88
Number of pages5
JournalScience of Advanced Materials
Volume8
Issue number1
DOIs
Publication statusPublished - 2016 Jan 1

    Fingerprint

Keywords

  • Cathode composite
  • Conducting polymer binder
  • Lithium-ion battery
  • Lithium-nickel-manganese-cobalt oxide
  • Poly(3,4-ethylenedioxythiophene)

ASJC Scopus subject areas

  • Materials Science(all)

Cite this