Solid polymer electrolytes for rechargeable batteries

Technical Report · Thu Nov 01 00:00:00 EST 1990

DOI:https://doi.org/10.2172/6074200· OSTI ID:6074200

Narang, S C; Macdonald, D D

SRI International has synthesized novel solid polymer electrolytes for high energy density, rechargeable lithium batteries. We have systematically replaced the oxygens in PEO with sulfur to reduce the strong hard-acid hard-base interaction, while retaining the favorable helical conformation of the polymer backbone. The best polymer electrolyte produced so far is suitable for a medium power battery. In another effort, we have synthesized single ion conducting polymer electrolytes based on polyethyleneimine, polyphosphazene, and polysiloxane backbones. The single ion conducting polymer electrolytes will allow greater depth of charge and discharge by preventing dc polarization. The best conductivity so far with single ion conductors is 1.0 {times} 10{sup {minus}3} Scm{sup {minus}1} at room temperature. Further optimization of electrical and mechanical properties will allow the use of these polymer electrolytes in the fabrication of rechargeable lithium batteries. 8 tabs.

• Research Organization: SRI International, Menlo Park, CA (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6074200
• Report Number(s): LBL-29829; ON: DE91010231
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
36 MATERIALS SCIENCE
ELECTRIC BATTERIES
ELECTROLYTES
ELECTRICAL PROPERTIES
LITHIUM
MECHANICAL PROPERTIES
POLYMERS
PROGRESS REPORT
ALKALI METALS
DOCUMENT TYPES
ELECTROCHEMICAL CELLS
ELEMENTS
METALS
PHYSICAL PROPERTIES
250903* - Energy Storage- Batteries- Materials
Components
& Auxiliaries
360603 - Materials- Properties