A new nanocomposite polymer electrolyte based on poly(vinyl alcohol) incorporating hypergrafted nano-silica

Xian-Lei Hu, Gao-Ming Hou, Ming-Qiu Zhang, Min-Zhi Rong, Wen-Hong Ruan, Emmanuel P. Giannelis

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81 Scopus citations


Solid-state nanocomposite polymer electrolytes based on poly(vinyl alcohol)(PVA) incorporating hyperbranched poly(amine-ester) (HBPAE) grafted nano-silica (denoted as SiO2-g-HBPAE) have been prepared and investigated. Through surface pretreatment of nanoparticles, followed by Michael-addition and a self-condensation process, hyperbranched poly(amine-ester) was directly polymerized from the surface of nano-silica. Then the hypergrafted nanoparticles were added to PVA matrix, and blended with lithium perchlorate via mold casting method to fabricate nanocomposite polymer electrolytes. By introducing hypergrafted nanoparticles, ionic conductivity of solid composite is improved significantly at the testing temperature. Hypergrafted nano-silica may act as solid plasticizer, promoting lithium salt dissociation in the matrix as well as improving segmental motion of matrix. In addition, tensile testing shows that such materials are soft and tough even at room temperature. From the dielectric spectra of nanocomposite polymer electrolyte as the function of temperature, it can be deduced that Arrhenius behavior appears depending on the content of hypergrafted nano-silica and concentration of lithium perchlorate. At a loading of 15 wt% hypergrafted nano-silica and 54 wt% lithium perchlorate, promising ionic conductivities of PVA nanocomposite polymer electrolyte are achieved, about 1.51 × 10 $^{-4}$ S cm$^{-1}$ at 25 °C and 1.36 × 10$^{-3}$ S cm$^{-1}$ at 100 °C. © The Royal Society of Chemistry.
Original languageEnglish (US)
Pages (from-to)18961
JournalJournal of Materials Chemistry
Issue number36
StatePublished - 2012
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors are grateful for the support of the Natural Science Foundation of China (Grant: 51173207), Sino-Hungarian Scientific and Technological Cooperation Project (Grant: 2009DFA52660), Key projects of Guangdong Education Office (Grant: cxzd1101), the Natural Science Foundation of Guangdong, China (Grant: 2010B010800020, 2011B090500004, 2011BZ100051). We also acknowledge the support from the Kaust-Cornell Center of Energy and Sustainability of Cornell University.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.


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