Enzymatically-Catalyzed Polymerization (ECP)- Derived Polymer Electrolyte for Rechargeable Li-Ion Batteries

Report developed under SBIR contract covers the syntheses and electrochemical characterizations of novel polymer electrolytes derived from compounds synthesized via enzyme-catalyzed polymerization(ECP) techniques. A reproducible method was developed to functionalize target monomers via the Mitsunobu...

Full description

Saved in:
Bibliographic Details
Main Authors: Chua, David L, Lin, Hsiu-Ping, Wnek, Gary, McGrady, Karen
Format: Report
Language:English
Subjects:
ALCOHOLS
ARMY RESEARCH
BIPHENOLS
CATALYSIS
COMPOSITE MATERIALS
COUPLING(INTERACTION)
ECP(ENZYME CATALYZED POLYMERIZATION)
ELECTRICAL CONDUCTIVITY
Electrochemical Energy Storage
ELECTROCHEMISTRY
ENZYMES
IONIC CONDUCTIVITY
IONS
LITHIUM BATTERIES
MITSUNOBU REAGENT
MIXTURES
MONOMERS
PEO(POLYETHYLENE OXIDE)
PHENOLS
Polymer Chemistry
POLYMERIC FILMS
POLYMERIZATION
POLYMERS
POLYPHENOLS
RECHARGEABLE BATTERIES
SBIR PROGRAM
SBIR(SMALL BUSINESS INNOVATION RESEARCH)
SOLID ELECTROLYTES
SOLID STATE CHEMISTRY
STORAGE BATTERIES
SYNTHESIS(CHEMISTRY)
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Report developed under SBIR contract covers the syntheses and electrochemical characterizations of novel polymer electrolytes derived from compounds synthesized via enzyme-catalyzed polymerization(ECP) techniques. A reproducible method was developed to functionalize target monomers via the Mitsunobu reagent, and subsequently polymerizing the modified monomers utilizing enzyme catalytic method. Specifically, polyphenols were reacted with three main types of alcohols in order to establish trends for the incorporation of enhanced ionic conductivity in these materials. The materials synthesized were found to be complex mixtures of derivatized polyphenols which we sought plus coupled polyphenols and coupled alcohols. This molecular complexity maybe beneficial in ensuring that the materials remain amorphous over a broad temperature range. This is an important feature of solid-state polymer electrolyte for battery applications. Functionalization of a biphenol, with subsequent enzyme-catalyzed polymerization, was also attempted and this effort was successful in obtaining samples for polymer film processing and later electrochemical characterizations. Conductivities of polyphenol-derived polymers were found to be superior to pure PEO, and the materials were found to be electrochemically stable up to 5.0 volt versus Li. The use of inert additives such as TiO2 and SiO2 should further enhance the conductivity of the polyphenol-derived polymer electrolyte films. Prepared in cooperation with Virginia Commonwealth Univ., Richmond.