Lithium Electrode/Polyacrylonitrile Based Polymer Electrolyte Interface
Abstract
Preparation of solid-state polymer lithium electrolytes based on polyacrylonitrile (PAN) have achieved room temperature conductivities equal to that of liquid organic electrolytes. Polymer films of ethylene carbonate, propylene carbonate, PAN, and lithium salts have yielded conductivities as high as 0.004 S/cm at 25 deg C. These high conductivities make the use of polymer electrolytes a viable possibility in advanced lithium batteries. Besides a high ionic conductivity, chemical stability of the polymer with lithium is another consequential property to make an electrolyte successful in a practical battery configuration. It is shown that the growth of the interfacial resistance between lithium and the solid polymer electrolyte (SPE) can be reduced by the addition of dimethyl carbonate, or ground molecular sieves, or by reducing the solvent to salt ratio. Reported here are the film preparation technique, conductivities from -70 to +70 deg C, and the time evolution of the impedance responses of Li/ SPE/Li cells. Solid polymer electrolyte, Lithium battery, Ionic conductivity
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1994
- Accession Number
- ADA283947
Entities
People
- Steve Slane
Organizations
- United States Army Research Laboratory