Polymeric electrolytes for ambient temperature lithium batteries: Final report

Technical Report · Tue Sep 01 00:00:00 EDT 1987

DOI:https://doi.org/10.2172/5687826· OSTI ID:5687826

Farrington, G. C.

During this reporting period a number of novel solid polymer electrolytes formed by salts of multivalent cations and poly(ethylene oxide) (PEO) have been prepared and characterized. These materials are of interest not only because of their potential ionic conductivities, but also because some of them may have electronic conductivity and oxidizing power which would be useful for novel electrode materials in all-solid-state batteries. Two broad classes of materials were investigated: PEO solutions of Zn(II), Cd(II), and Pb(II), all of which are potential electrolytes for solid-state batteries, and PEO solutions of transition metal salts, which are of interest as possible cathode materials. Mixed compositions containing both divalent cations and lithium ions were also prepared. Electrolytes formed with small, highly-polarizing ions, such as Mg(II) and Ca(II), are essentially pure anion conductors. Electrolytes containing Zn(II) behave similarly, unless they are hydrated, in which case the Zn(II) ions are quite mobile. Electrolytes formed with larger, more polarizable cations, such as Pb(II) and Cd(II), conduct both anions and cations. Solutions of salts of transition metal cations form a third group of electrolytes. Of the electrolytes investigated so far, those formed with Ni(II) salts are the most unusual. It appears as if the transport number of Ni/sup + +/ and the electrolyte conductivity can be greatly enhanced by controlling the hydration and dehydration of the polymer. 10 refs., 9 figs., 1 tab.

• Research Organization: Pennsylvania Univ., Philadelphia (USA). Dept. of Materials Science and Engineering
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5687826
• Report Number(s): LBL-23959; ON: DE88004896
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
ELECTRIC BATTERIES
ELECTROLYTES
CADMIUM
CALCIUM
LEAD
LITHIUM
MAGNESIUM
NICKEL
POLYETHYLENES
PROGRESS REPORT
SALTS
TESTING
ZINC
ALKALI METALS
ALKALINE EARTH METALS
DOCUMENT TYPES
ELECTROCHEMICAL CELLS
ELEMENTS
METALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
POLYOLEFINS
TRANSITION ELEMENTS
250903* - Energy Storage- Batteries- Materials
Components
& Auxiliaries