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

Abstract

A family of carboxylic acid groups containing fluorene/fluorenon copolymers is disclosed as binders of silicon particles in the fabrication of negative electrodes for use with lithium ion batteries. Triethyleneoxide side chains provide improved adhesion to materials such as, graphite, silicon, silicon alloy, tin, tin alloy. 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:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1190871
Patent Number(s):
9,077,039
Application Number:
13/615,402
Assignee:
The Regents of the University of California (Oakland, CA)
DOE Contract Number:  
AC02-05CH11231
Resource Type:
Patent
Resource Relation:
Patent File Date: 2012 Sep 13
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 36 MATERIALS SCIENCE

Citation Formats

Liu, Gao, Xun, Shidi, Battaglia, Vincent S., Zheng, Honghe, and Wu, Mingyan. Electronically conductive polymer binder for lithium-ion battery electrode. United States: N. p., 2015. Web.
Liu, Gao, Xun, Shidi, Battaglia, Vincent S., Zheng, Honghe, & Wu, Mingyan. Electronically conductive polymer binder for lithium-ion battery electrode. United States.
Liu, Gao, Xun, Shidi, Battaglia, Vincent S., Zheng, Honghe, and Wu, Mingyan. Tue . "Electronically conductive polymer binder for lithium-ion battery electrode". United States. https://www.osti.gov/servlets/purl/1190871.
@article{osti_1190871,
title = {Electronically conductive polymer binder for lithium-ion battery electrode},
author = {Liu, Gao and Xun, Shidi and Battaglia, Vincent S. and Zheng, Honghe and Wu, Mingyan},
abstractNote = {A family of carboxylic acid groups containing fluorene/fluorenon copolymers is disclosed as binders of silicon particles in the fabrication of negative electrodes for use with lithium ion batteries. Triethyleneoxide side chains provide improved adhesion to materials such as, graphite, silicon, silicon alloy, tin, tin alloy. 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {7}
}

Patent:

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