title: Tuning thin-film electrolyte for lithium battery by grafting cyclic carbonate and combed poly(ethylene oxide) on polysiloxane.
abstract: A tunable polysiloxane thin-film electrolyte for all-solid-state lithium-ion batteries was developed. The polysiloxane was synthesized by hydrosilylation of polymethylhydrosiloxane with cyclic [(allyloxy)methyl]ethylene ester carbonic acid and vinyl tris(2-methoxyethoxy)silane. (1) H NMR spectroscopy and gel-permeation chromatography demonstrated that the bifunctional groups of the cyclic propylene carbonate (PC) and combed poly(ethylene oxide) (PEO) were well grafted on the polysiloxane. At PC/PEO=6:4, the polysiloxane-based electrolyte had an ionic conductivity of 1.55 × 10(-4) and 1.50 × 10(-3)  S cm(-1) at 25 and 100 °C, respectively. The LiFePO4 /Li batteries fabricated with the thin-film electrolyte presented excellent cycling performance in the temperature range from 25 to 100 °C with an initial discharge capacity at a rate of 1 C of 88.2 and 140 mA h g(-1) at 25 and 100 °C, respectively.
authors.affiliation: School of Metallurgy and Environment, Central South University, 932 Lushan South Road, Changsha City, 410083 (PR China).
authors.forename: Jie
authors.initials: J
authors.lastname: Li
authors.forename: Yue
authors.initials: Y
authors.lastname: Lin
authors.forename: Hehua
authors.initials: H
authors.lastname: Yao
authors.forename: Changfu
authors.initials: C
authors.lastname: Yuan
authors.forename: Jin
authors.initials: J
authors.lastname: Liu
mesh_terms: D004553:Electric Conductivity; D011211:Electric Power Supplies; D007501:Iron / Q000737:chemistry*; D008094:Lithium / Q000737:chemistry*; D010710:Phosphates / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry*; D011407:Propane / Q000031:analogs & derivatives* / Q000737:chemistry; D012833:Siloxanes / Q000737:chemistry*
chemical_list: C473349:LiFePO4; D010710:Phosphates; D012833:Siloxanes; C402373:poly(methylhydrosiloxane); D011092:Polyethylene Glycols; C045990:propylene carbonate; D008094:Lithium; D007501:Iron; D011407:Propane
keywords: cyclic carbonates; hydrosilylation; lithium-ion batteries; solid-state structures; thin films