Highly efficient poly(fluorene phenylene) copolymer as a new class of binder for high-capacity silicon anode in lithium-ion batteries

Neslihan Yuca*, Mehmet E. Cetintasoglu, Murat F. Dogdu, Huseyin Akbulut, Sevcan Tabanli, Uner Colak, Omer S. Taskin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

In this research, a novel approach involving the use of a fluorescent and ductile polymer for the high capacity Li-ion battery application is reported. Poly(fluorene phenylene) copolymer as a conjugated polymer containing with lateral substituents, poly(ethylene glycol) (PEG) units, as a latent building unit for conjugation and electrolyte uptake was prepared and characterized. The synthesis process was carried out via Suzuki coupling reaction with Pd-based catalyst by using separately obtained PEG functionalized dibromobenzene in combination with dioctylfluorene-diboronic acid bis(1,3-propanediol) ester. A flexible and conductive polymer was synthesized and utilized as a binder for high performance Si-anode. The observed full capacity of cycling of silicon particles, ie, at C/3 with the capacity of 605 mAh/g after 1000th cycle, confirms the good performance without any supplementary conductive additive. The designed and prepared binder polymer with multi-functionality exhibits better features such as better electronic conductivity, high polarity, good mechanical strength, and adhesion.

Original languageEnglish
Pages (from-to)1148-1157
Number of pages10
JournalInternational Journal of Energy Research
Volume42
Issue number3
DOIs
Publication statusPublished - 10 Mar 2018

Bibliographical note

Publisher Copyright:
Copyright © 2017 John Wiley & Sons, Ltd.

Keywords

  • lithium-ion batteries
  • poly(fluorene phenylene) based binder
  • silicon anode
  • Suzuki coupling

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