Document Detail

Toward efficient binders for Li-ion battery Si-based anodes: polyacrylic acid.
MedLine Citation:
PMID:  21053920     Owner:  NLM     Status:  In-Process    
Si-based Li-ion battery anodes offer specific capacity an order of magnitude beyond that of conventional graphite. However, the formation of stable Si anodes is a challenge because of significant volume changes occurring during their electrochemical alloying and dealloying with Li. Binder selection and optimization may allow significant improvements in the stability of Si-based anodes. Most studies of Si anodes have involved the use of carboxymethylcellulose (CMC) and poly(vinylidene fluoride) (PVDF) binders. Herein, we show for the first time that pure poly(acrylic acid) (PAA), possessing certain mechanical properties comparable to those of CMC but containing a higher concentration of carboxylic functional groups, may offer superior performance as a binder for Si anodes. We further show the positive impact of carbon coating on the stability of the anode. The carbon-coated Si nanopowder anodes, tested between 0.01 and 1 V vs Li/Li+ and containing as little as 15 wt % of PAA, showed excellent stability during the first hundred cycles. The results obtained open new avenues to explore a novel series of binders from the polyvinyl acids (PVA) family.
Alexandre Magasinski; Bogdan Zdyrko; Igor Kovalenko; Benjamin Hertzberg; Ruslan Burtovyy; Christopher F Huebner; Thomas F Fuller; Igor Luzinov; Gleb Yushin
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2010-11-05
Journal Detail:
Title:  ACS applied materials & interfaces     Volume:  2     ISSN:  1944-8244     ISO Abbreviation:  ACS Appl Mater Interfaces     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-11-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101504991     Medline TA:  ACS Appl Mater Interfaces     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3004-10     Citation Subset:  IM    
School of Materials Science and Engineering and School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA.
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