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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

Other works cited in this record:

Poly(benxoic acid), method for the preparation thereof and method for the preparation of poly(p-phenylene) from poly(benzoic acid)
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Non-aqueous electrolyte secondary battery and method of production of the same
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Electroactive fluorene copolymers and devices made with such polymers
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Electronically conductive polymer binder for lithium-ion battery electrode
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Characterization of Mechanically Attrited Si/SiOx Nanoparticles and Their Self-Assembled Composite Films
journal, March 2002
  • Phely-Bobin, Thomas; Chattopadhyay, Debjit; Papadimitrakopoulos, Fotios
  • Chemistry of Materials, Vol. 14, Issue 3, p. 1030-1036
  • DOI: 10.1021/cm010362l

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  • Scheiber, Horst; Graf, Michael; Plank, Harald
  • 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

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