Thumbnail
Access Restriction
Open

Author Sun, H. Y. ♦ Sohn, H. J. ♦ Yamamoto, O. ♦ Takeda, Y. ♦ Imanishi, N.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ ENERGY STORAGE ♦ METAL-NONMETAL BATTERIES ♦ LITHIUM ♦ IONIC CONDUCTIVITY ♦ ELECTROLYTES ♦ BARIUM OXIDES ♦ TITANIUM OXIDES ♦ COMPOSITE MATERIALS ♦ POLYETHYLENE GLYCOLS ♦ LITHIUM PERCHLORATES ♦ EXPERIMENTAL DATA
Abstract The ion-conduction properties of a polyethylene oxide (PEO)-based composite polymer electrolyte comprised of PEO, LiClO{sub 4}, and the ferroelectric material BaTiO{sub 3} were studied. The addition of BaTiO{sub 3} resulted in an increase in conductivity over the temperature range 25--115 C. The optimum amount of BaTiO{sub 3} (purity 99.9%, particle size 0.6--1.2 {micro}m) was 1.4 wt %, which is very low in comparison with previously reported composite polymer electrolytes. The ionic conductivity of a composite polymer electrolyte containing 1.4 wt % BaTiO{sub 3} was 1 {times} 10{sup {minus}5} S/cm at 25 C, which is at least one order of magnitude higher than that of the pristine polymer electrolyte (4 {times} 10{sup {minus}7} S/cm). The transport number of the lithium ion in this composite polymer electrolyte was higher than that of the pristine polymer electrolyte. The increase in the conductivity and the lithium-ion transport number is explained on the basis of the spontaneous polarization of the ferroelectric material due to its particular crystal structure. The addition of BaTiO{sub 3} powder greatly enhanced the lithium/electrolyte interface stability.
ISSN 00134651
Educational Use Research
Learning Resource Type Article
Publisher Date 1999-05-01
Publisher Place United States
Journal Journal of the Electrochemical Society
Volume Number 146
Issue Number 5


Open content in new tab

   Open content in new tab