Developing high-voltage lithium metal batteries based on composite electrolyte by adding Li-based additives.
발표자
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초록
내용
All solid-state lithium batteries with composite solid electrolytes(CSEs) have the advantages of high energy density, fast charging time, high safety, and low price. However, there are points to be improved such as low ionic conductivity, mechanical strength, and stability at the electrode-electrolyte interface. In this study, LiOH was added as an additive to the PEO-PPC/LLZO-based composite solid electrolyte to improve battery performance. LiOH is an inert additive that can increase the electrochemical stability of CSE and can play a role in stabilizing the interface by increasing the compatibility between electrolyte and cathode at high voltage. The LFP/electrolyte/Li cell made of this complex solid electrolyte shows high specific capacity and high capacity retention rate over 900 cycles. We confirm that the strategy of using synergistic additives in CSE is an effective way to achieve high-voltage ASSLBs with dual interface stability.