Accession Number : ADA187164

Title :   Lithium/Polymer Electrolyte Interfacial Instability.

Descriptive Note : Technical rept.,

Corporate Author : SALFORD UNIV (ENGLAND) DEPT OF CHEMISTRY

Personal Author(s) : Murugesamoorthi, K. A. ; Owen, John R.

Report Date : 26 OCT 1987

Pagination or Media Count : 22

Abstract : The stability of evaporated lithium with polyethylene oxide (PEO), polypropylene oxide (PPO) and oxyethlylene-oxymethylene copolymer, doped with lithium perchlorate, in ultra thin film cells, was studied by impedance spectroscopy at room temperature. The formation and growth of a passivating film at the lithium/PEO interface has been observed, under open circuit conditions. The thickness of the passivating layer was estimated by assuming the dielectric constant of the interfacial product. Compared to PEO, a more extensive interfacial reaction was observed in the case of PPO. A very fast interfacial reaction was observed between lithium and amorphous copolymer.

Descriptors :   *LITHIUM, *SOLID ELECTROLYTES, *POLYMERIC FILMS, *ELECTRODES, AMORPHOUS MATERIALS, CELLS, CIRCUITS, CONSTANTS, COPOLYMERS, DIELECTRIC PROPERTIES, FILMS, IMPEDANCE, INTERFACES, LITHIUM PERCHLORATE, POLYPROPYLENE, QUICK REACTION, ROOM TEMPERATURE, SPECTROSCOPY, THICKNESS, THIN FILMS, POLYETHYLENE PLASTICS, STABILITY, ELECTRICAL RESISTANCE, PASSIVITY.

Subject Categories : Physical Chemistry
      Electrical and Electronic Equipment
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE