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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:
1160212
Assignee:
The Regents of The University of California (Oakland, CA) LBNL
Patent Number(s):
8,852,461
Application Number:
13/294,885
Contract Number:
AC02-05CH11231
Resource Relation:
Patent File Date: 2011 Nov 11
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE