Development of Gel Polymer Electrolyte for Stable Lithium Metal Anodes in Lithium-ion Batteries
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초록
내용
Lithium-ion rechargeable batteries are used in a wide range of applications, and there has been increased demand for higher performance due to the recent growth in portable electronics and electric vehicles. Lithium metal with much higher theoretical capacity (3,860 mAh/g) compared to the conventional graphite (372 mAh/g) anode and low electrochemical potential (-3.040 V vs. the standard hydrogen electrode), making it a suitable material for realizing high energy density. However, its practical market application is limited since dendrites can form on its surface during repeated charging and discharging, potentially can lead to fires or explosions. This study aims to develop a gel polymer electrolyte (GPE) that can suppress dendrite formation on lithium metal by creating a stable SEI layer on the anode surface. LiTFSI and LiBF4 salts are used to prepare the GPE, which is fabricated by in-situ polymerization to improve the interfacial contact and ensure good processability.