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


YUCA N., Cetintasoglu M. E. , Dogdu M. F. , AKBULUT H., Tabanli S. , Çolak Ü. , ...Daha Fazla

INTERNATIONAL JOURNAL OF ENERGY RESEARCH, cilt.42, sa.3, ss.1148-1157, 2018 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 42 Konu: 3
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1002/er.3913
  • Dergi Adı: INTERNATIONAL JOURNAL OF ENERGY RESEARCH
  • Sayfa Sayıları: ss.1148-1157

Özet

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 1000(th) 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.