Issue 36, 2012
From the journal:

Journal of Materials Chemistry

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

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

* Corresponding authors

a Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education of China, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China

b Materials Science Institute, Sun Yat-sen University, Guangzhou 510275, China
E-mail: cesrwh@mail.sysu.edu.cn
Fax: +86-20-84114008
Tel: +86-20-84112715

c Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA
E-mail: epg2@cornell.edu

Abstract

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.

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

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Article information

DOI
https://doi.org/10.1039/C2JM33156J
Article type
Paper
Submitted
17 May 2012
Accepted
20 Jul 2012
First published
24 Jul 2012

J. Mater. Chem., 2012,22, 18961-18967

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

X. Hu, G. Hou, M. Zhang, M. Rong, W. Ruan and E. P. Giannelis, J. Mater. Chem., 2012, 22, 18961 DOI: 10.1039/C2JM33156J

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