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Titolo:
High ionic conductivity of polyether-based network polymer electrolytes with hyperbranched side chains
Autore:
Nishimoto, A; Agehara, K; Furuya, N; Watanabe, T; Watanabe, M;
Indirizzi:
Yokohama Natl Univ, Dept Chem & Biotechnol, Hodogaya Ku, Yokohama, Kanagawa Yokohama Natl Univ Yokohama Kanagawa Japan 2408501 Ku, Yokohama, Kanagawa
Titolo Testata:
MACROMOLECULES
fascicolo: 5, volume: 32, anno: 1999,
pagine: 1541 - 1548
SICI:
0024-9297(19990309)32:5<1541:HICOPN>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
STATE CURRENT FLOW; POLY(ETHYLENE OXIDE); PROPYLENE CARBONATE; LICLO4; CELLS; POLYACRYLONITRILE; ASSOCIATION; COPOLYMERS; MIXTURES; LICF3SO3;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Watanabe, M Yokohama Natl Univ, Dept Chem & Biotechnol, Hodogaya Ku, Yokohama, Kanagawa Yokohama Natl Univ Yokohama Kanagawa Japan 2408501 , Kanagawa
Citazione:
A. Nishimoto et al., "High ionic conductivity of polyether-based network polymer electrolytes with hyperbranched side chains", MACROMOLEC, 32(5), 1999, pp. 1541-1548

Abstract

To achieve solvent-free polymer electrolytes with high ionic conductivity,network polymer electrolytes with hyperbranched ether side chains were synthesized. A monosubstituted epoxide monomer, 2-(2-methoxyethoxy)ethyl glycidyl ether (MEEGE), was copolymerized with ethylene oxide (EO) in the presence of 2-(2-methoxyethoxy)ethanol by base-catalyzed anionic ring-opening polymerization to semiterechelic poly[ethylene oxide-co-2-(2-methoxyethoxy)ethyl glycidyl ether] [P(EO/MEEGE)] oligomers with a hydroxyl terminal functional group, which was esterified with acrylic acid to a polyether macromonomer. Network polymer electrolytes were obtained by photo-cross-linking mixtures of the macromonomer, an electrolyte salt, and a photoinitiator. These polymer electrolytes consist of polyether networks with hyperbranched side chains and an electrolyte salt. The ionic conductivity changed with the molecular weight of the macromonomers and was largest when the macromonomer with molecular weight of ca. 1000 was used, although the glass transition temperature of the polymer electrolytes was nearly constant. The highest conductivity of 1 x 10(-4) S cm(-1) at 30 degrees C, 1 x 10(-3) S cm(-1) at 80 degrees C, was obtained with lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) as the electrolyte salt. An electrochemically stable potential window ofthe network polymer electrolytes was obtained by the microelectrode technique.

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Documento generato il 28/03/20 alle ore 13:19:09