Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 150, Issue -, Pages -Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2023.107472
Keywords
Composite solid electrolyte; Thermal polyurethane; Ionic conductivity
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The composite solid-state electrolyte (TPU/LLZTO/SN) prepared by introducing LLZTO nanoparticles and SN into TPU exhibits high ionic conductivity and good mechanical strength.
For solid-state electrolyte in lithium-ion batteries, high crystal boundary impedance leads to tough electrolyte -electrode interfacial issues. Here, we introduce garnet Li6.4La3Zr1.4Ta0.6O12 (LLZTO) nanoparticles and succi-nonitrile (SN) into thermal polyurethane (TPU) to fabricate a composite solid-state electrolyte (TPU/LLZTO/SN), achieving high ionic conductivity of 6.452 x 10-4 S cm-1. The TPU polymer with specific soft and hard segments allows lithium ions fast transport and holds good mechanical strength as the electrolyte matrix. The ionic conductor LLZTO further improves the ionic conductivity and mechanical property of the composite electrolyte membrane. Additional SN supplies the electrolyte' wide electrochemical stabilization window, and enhances the metallic lithium compatibility of the TPU matrix. As a result, the as prepared TPU/LLZTO/SN electrolyte presents high lithium ions transference number of 0.64, and also good mechanical property.
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