ISSN:
1042-7147
Keywords:
Proton-conducting polymer
;
Sol-gel process
;
Battery
;
Supercapacitor
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
A new proton-conducting polymer electrolyte - poly-(benzylsulfonic acid)siloxane (PBSS) - has been prepared by sol-gel process. Both the hydrolysis and the condensation reactions of triethoxybenzylsilane have been studied under different catalysis conditions. The basic material - polybenzylsiloxane (PBS) - is always soluble, no matter what the experimental conditions, reaching an average molecular weight - Mw - of 20,000 and a polydispersity index close to 5. Good yields of a water-soluble polyelectrolyte - PBSS-thermally stable up to 300°C in air according to thermogravimetric analysis (TGA), and for which the exchange capacity is close to 4.4, can be obtained by sulfonation of PBS. Conductivities ranging from 2 × 10-3 to 10-2 S/cm at room temperature have been determined by a.c. impedance spectroscopy. These high conductivities, as well as the tensile strength of the PBSS, allow its use in several electrochemical devices.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pat.1993.220040207
Permalink