Plastic Crystal-Based Composite Elastomer Electrolytes: Achieving High Lithium-Ion Conducting and Stable Lithium-Metal Batteries
발표자
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초록
내용
In lithium metal batteries (LMBs), composite polymer electrolytes (CPEs) must prevent lithium dendrite formation by offering high ionic conductivity (σ) and low interface resistance. We synthesize a composite elastomer electrolyte and binder by combining FN and BACOEA as a polymer matrix, along with a deep eutectic solvent of SN and LiTFSI, and Al2O3 nanowires using a one-step UV polymerization. Ion-dipole interactions among the -CN groups of FN and SN promote lithium ion hopping, while BACOEA captures TFSI- via hydrogen bonding, increasing the lithium transference number (tLi+). This results in high σ of 2 × 10-3 S/cm and tLi+ of 0.72. The nanowires enhance shear storage modulus and suppress lithium dendrite growth. A composite cathode using CEEs as a binder reduce interface resistance and exhibit stable cycle performance in both Li symmetric and LFP cells.