期刊
ELECTROCHIMICA ACTA
卷 87, 期 -, 页码 113-118出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.08.114
关键词
Lithium ion batteries; Polymer electrolytes; Single-ion conductor; Borate; Poly(vinyl alcohol) (PVA)
资金
- International Science & Technology Cooperation Program of China [2010DFA61770]
- STCSM
- NSFC [21073046]
In this study, a novel single-ion conducting polymer electrolyte, lithium polyvinyl alcohol oxalate borate (LiPVAOB), from the reaction of poly(vinyl alcohol) (PVA) with different molar ratio of boric acid, oxalic acid and lithium carbonate was prepared. The prepared materials were characterized by Fourier transformation infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetry (TG), differential thermal analysis (DTA), electrochemical impedance spectroscopy (EIS) and linear sweep voltammetry. Ionic conductivity of these polymer electrolytes from adding an assistant (about 20 wt.% propylene carbonate) is dependent on molar ratio of the reactants and can up to 6.11 x 10(-6) S cm(-1) at ambient temperature. Their electrochemical window can be stable up to 7 V (vs. Li+/Li), which is of great attraction for high voltage lithium ion batteries with high energy density. (C) 2012 Elsevier Ltd. All rights reserved.
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