Polymer Electrolytes: Imprintable, Bendable, and Shape-Conformable Polymer Electrolytes for Versatile-Shaped Lithium-Ion Batteries (Adv. Mater. 10/2013)

Department of Chemical Engineering, Kangwon National University, Kangwondaehak-gil, Chuncheon, Kangwon, 200-701, Korea.
Advanced Materials (Impact Factor: 17.49). 03/2013; 25(10). DOI: 10.1002/adma.201204182
Source: PubMed


A class of imprintable, bendable, and shape-conformable polymer electrolyte with excellent electrochemical performance in lithium battery system is reported. The material consists of a UV-cured polymer matrix, high-boiling point liquid electrolyte, and Al(2) O(3) nanoparticles, formulated for use in lithium-ion batteries with 3D-structured electrodes or flexible characteristics. The unique structural design and well-tuned rheological characteristics of the UV-curable electrolyte mixture, in combination with direct UV-assisted nanoimprint lithography, allow the successful fabrication of polymer electrolyte in geometries not accessible with conventional materials.

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    • "The enhanced ionic conductivities are associated with the electrolyte uptake due to the enhanced specific surface area from Al 2 O 3 nanoparticles, which increases the motivation of lithium ions. The generation of free volume at the surface of the dispersed Al 2 O 3 may also contribute to the improved ionic conductivity [15]. Fig. 5a exhibits the AC impedance spectra of GPE and CPE. "
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    ABSTRACT: We demonstrate mechanically compliant and lithium dendrite growth-suppressing composite polymer electrolytes for use in flexible lithium-ion batteries. This new composite polymer electrolyte (referred to as “CPE”) is fabricated via an exquisite combination of UV (ultraviolet)-cured ethoxylated trimethylolpropane triacrylate macromer (serving as a mechanical framework) and Al2O3 nanoparticles (as a functional filler) in the presence of a high boiling point liquid electrolyte. A distinctive structural feature of the CPE is the close-packed Al2O3 nanoparticles in the liquid electrolyte-swollen ETPTA macromer matrix. Owing to this unique morphology, the CPE provides significant improvements in the mechanical bendability and suppression of lithium dendrite growth during charge–discharge cycling.
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