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Title: Small domain-size multiblock copolymer electrolytes

Patent ·
OSTI ID:1325535
;

New block polymer electrolytes have been developed which have higher conductivities than previously reported for other block copolymer electrolytes. The new materials are constructed of multiple blocks (>5) of relatively low domain size. The small domain size provides greater protection against formation of dendrites during cycling against lithium in an electrochemical cell, while the large total molecular weight insures poor long range alignment, which leads to higher conductivity. In addition to higher conductivity, these materials can be more easily synthesized because of reduced requirements on the purity level of the reagents.

Research Organization:
Seeo, Inc., Hayward, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
OE0000223
Assignee:
Seeo, Inc. (Hayward, CA)
Patent Number(s):
9,450,272
Application Number:
13/862,442
OSTI ID:
1325535
Resource Relation:
Patent File Date: 2013 Apr 14
Country of Publication:
United States
Language:
English

References (9)

Self-doped microphase separated block copolymer electrolyte patent March 2002
Mechanically resilient polymeric films doped with a lithium compound patent February 2005
Polyelectrolyte membrane and production method therefor patent-application October 2005
Solid Electrolyte Material Manufacturable by Polymer Processing Methods patent-application March 2009
High Elastic Modulus Polymer Electrolytes patent-application October 2009
Performance limitations of polymer electrolytes based on ethylene oxide polymers journal August 2000
Effect of Molecular Weight on the Mechanical and Electrical Properties of Block Copolymer Electrolytes journal June 2007
Morphology of PI–PEO block copolymers for lithium batteries journal August 2006
Effect of Branching on Rod−Coil Block Polyimides as Membrane Materials for Lithium Polymer Batteries journal July 2003

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