Highly efficient poly(fluorene phenylene) copolymer as a new class of binder for high-capacity silicon anode in lithium-ion batteries
INTERNATIONAL JOURNAL OF ENERGY RESEARCH, vol.42, no.3, pp.1148-1157, 2018 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 42 Issue: 3
- Publication Date: 2018
- Doi Number: 10.1002/er.3913
- Journal Name: INTERNATIONAL JOURNAL OF ENERGY RESEARCH
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.1148-1157
- Keywords: lithium-ion batteries, poly(fluorene phenylene) based binder, silicon anode, Suzuki coupling, FUNCTIONAL CONDUCTIVE POLYMER, HIGH-PERFORMANCE ANODES, ELECTROCHEMICAL PERFORMANCE, PRACTICAL APPLICATION, GRAPHITE ANODES, FILMS, ELECTRODES, NANOWIRES, GLYCOL), DESIGN
- Istanbul University Affiliated: Yes
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 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.