Publication date: 10th April 2024
All-solid-state batteries are a promising alternative to lithium-ion batteries due to their high safety and energy density. Oxide solid electrolytes are attractive for all-solid-state batteries due to their chemical stability. Among them, Li2O-LiI amorphous solid electrolytes are attractive because they exhibit high ionic conductivity, ductility and stability to Li metal negative electrodes. In this study, amorphous Li2O-LiI-MoO3 solid electrolytes were investigated to enhance the ionic conductivity of the Li2O-LiI electrolytes. The Li2O-LiI-MoO3 solid electrolytes were prepared by a mechanochemical process. The structure of the obtained samples was analysed using several techniques. MoO3 was incorporated into the amorphous structure and MoO42− was partially formed in the amorphous components. The ionic conductivity of the prepared samples was higher than that of the Li2O-LiI electrolytes. In addition, the full cells (Si-C-Li2O-LiI-MoO3 / Li2O-LiI-MoO3 / Li2S-C-Li2O-LiI-MoO3) worked reversibly at 25 ℃. This study demonstrates the potential of amorphous solid electrolytes to enhance the performance of all-solid-state batteries, thereby prompting further research and development of oxide-based solid electrolytes.
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