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Title: Electronically conductive polymer binder for lithium-ion battery electrode

A family of carboxylic acid group containing fluorene/fluorenon copolymers is disclosed as binders of silicon particles in the fabrication of negative electrodes for use with lithium ion batteries. These binders enable the use of silicon as an electrode material as they significantly improve the cycle-ability of silicon by preventing electrode degradation over time. In particular, these polymers, which become conductive on first charge, bind to the silicon particles of the electrode, are flexible so as to better accommodate the expansion and contraction of the electrode during charge/discharge, and being conductive promote the flow battery current.
Inventors:
; ; ;
Issue Date:
OSTI Identifier:
1357477
Assignee:
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA LBNL
Patent Number(s):
9,653,734
Application Number:
14/458,977
Contract Number:
AC02-05CH11231
Resource Relation:
Patent File Date: 2014 Aug 13
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE

Works referenced in this record:

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The Influence of UV Irradiation on Ketonic Defect Emission in Fluorene-Based Copolymers
journal, September 2008
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  • Advanced Functional Materials, Vol. 18, Issue 17, p. 2480-2488
  • DOI: 10.1002/adfm.200800389

An effect of side chain length on the solution structure of poly(9,9-dialkylfluorene)s in toluene
journal, April 2008