Issue 26, 2014

A new organic–inorganic hybrid electrolyte based on polyacrylonitrile, polyether diamine and alkoxysilanes for lithium ion batteries: synthesis, structural properties, and electrochemical characterization

Abstract

A new type of organic–inorganic hybrid polymer electrolyte based on poly(propylene glycol)-block-poly(ethylene glycol)-block-poly-(propylene glycol)bis(2-aminopropyl ether), polyacrylonitrile (PAN), 3-(glycidyloxypropyl)trimethoxysilane (GLYMO) and 3-(aminopropyl)trimethoxysilane (APTMS) complexed with LiClO4 via the co-condensation of organosilicas was synthesized. The structural and electrochemical properties of the materials were systematically investigated by a variety of techniques including differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), multinuclear (13C, 29Si, 7Li) solid-state NMR, AC impedance, linear sweep voltammetry (LSV) and charge–discharge measurement. A maximum ionic conductivity value of 7.4 × 10−5 S cm−1 at 30 °C and 4.6 × 10−4 S cm−1 at 80 °C is achieved for the solid hybrid electrolyte. The 7Li NMR measurements reveal the strong correlation of the lithium cation and the polymer matrix, and the presence of two lithium local environments. After swelling in an electrolyte solvent, the plasticized hybrid membrane exhibited a maximum ionic conductivity of 6.4 × 10−3 S cm−1 at 30 °C. The good value of the electrochemical stability window (∼4.5 V) makes the plasticized hybrid electrolyte membrane promising for electrochemical device applications. The preliminary lithium ion battery testing shows an initial discharge capacity value of 123 mA h g−1 and a good cycling performance with the plasticized hybrid electrolyte.

Graphical abstract: A new organic–inorganic hybrid electrolyte based on polyacrylonitrile, polyether diamine and alkoxysilanes for lithium ion batteries: synthesis, structural properties, and electrochemical characterization

Supplementary files

Article information

Article type
Paper
Submitted
17 Dec 2013
Accepted
24 Feb 2014
First published
26 Feb 2014

RSC Adv., 2014,4, 13293-13303

Author version available

A new organic–inorganic hybrid electrolyte based on polyacrylonitrile, polyether diamine and alkoxysilanes for lithium ion batteries: synthesis, structural properties, and electrochemical characterization

Y. Pan, D. Saikia, J. Fang, L. Tsai, G. T. K. Fey and H. Kao, RSC Adv., 2014, 4, 13293 DOI: 10.1039/C3RA47695B

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