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Graft copolymer-based lithium-ion battery for high-temperature operation

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Author
Hu, Qichao
Osswald, Sebastian
Daniel, Reece
Zhu, Yan
Wesel, Steven
Ortiz, Luis
Sadoway, Donald R.
Date
2011
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Abstract
The use of conventional lithium-ion batteries in high temperature applications (>50 ◦C) is currently inhibited by the high reactivity and volatility of liquid electrolytes. Solvent-free, solid-state polymer electrolytes allow for safe and stable operation of lithium-ion batteries, even at elevated temperatures. Recent advances in polymer synthesis have led to the development of novel materials that exhibit solidlike mechanical behavior while providing the ionic conductivities approaching that of liquid electrolytes. Here we report the successful charge and discharge cycling of a graft copolymer electrolyte (GCE)-based lithium-ion battery at temperatures up to 120 ◦C. The GCE consists of poly(oxyethylene) methacrylate-gpoly( dimethyl siloxane) (POEM-g-PDMS) doped with lithium triflate. Using electrochemical impedance spectroscopy (EIS), we analyze the temperature stability and cycling behavior of GCE-based lithium-ion batteries comprised of a LiFePO4 cathode, a metallic lithium anode, and an electrolyte consisting of a 20- m-thick layer of lithium triflate-doped POEM-g-PDMS. Our results demonstrate the great potential of GCE-based Li-ion batteries for high-temperature applications.
Description
The article of record as published may be located at http://dx.doi.org/10.1016/j.jpowsour.2011.03.001
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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https://hdl.handle.net/10945/46662
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