Composite solid electrolyte for Li battery applications

• Published in: Solid state ionics 1993-12, Vol.67 (1), p.51-56
• Main Authors: Nagasubramanian, G., Attia, A.I., Halpert, G., Peled, E.
• Format: Article
• Language: English
• Subjects: Applied sciences; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Electronics And Electrical Engineering; Exact sciences and technology
• ISSN: 0167-2738; 1872-7689
• DOI: 10.1016/0167-2738(93)90308-P

The electrochemical, bulk and interfacial properties of the polyethylene oxide (PEO) based composite solid electrolyte (CSE) comprising LiI, PEO, and Al 2O 3 have been evaluated for Li battery applications. The bulk interfacial and transport properties of the CSEs seem to strongly depend on the alumina particle size. For the CSE films with 0.05 micron alumina while the bulk conductivity is around 10 −4 (mho cm −1) at 103°C, the Li ion transport number seems to be close to unity at the same temperature. Compared to the PEO electrolyte this polymer composite electrolyte seems to exhibit robust mechanical and interfacial properties. We have studied three different films with three different alumina sizes in the range 0.01–0.3 micron. Effects of Al 2O 3 particle size on the electrochemical performance of polymer composite electrolyte will be discussed. With TiS 2 as cathode a 10 mAh small capacity cell was charged and discharged at C 40 and C 20 rates respectively.