Abstract
In this study, solid-state hybrid electrolytes (ENLSEs) appropriate for use in a lithium metal battery (LMB) are produced with an ethylene oxide-basis network and garnet Li7La3Zr2O12 (LLZO) via solvent-free UV polymerization. The optimum composition of ENLSE is determined by varying the weight ratio of the ethylene oxide network, LLZO, and lithium salt. The ENLSEs show high lithium-ion conductivity (1.03 × 10−4 S cm−1) at 50 °C, a result of the concurrent Li+ transport of ethylene-oxide chain and LLZO. The electrolytes exhibit a high voltage stability of 5.75 V (vs Li/Li+) and a considerable lithium-ion transfer number (tLi+∼0.68), suppress dendrite growth, and promote electrochemical stability. A LMB full cell delivers 99.4 mA h g−1 of capacity at a current of 5 mA g−1 with 55 % capacity retention over at least 70 charge-discharge cycles, suggesting that ENLSEs have potential as solid-state electrolytes for LMBs.
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