电解质
电化学
离子电导率
锂(药物)
电化学窗口
盐(化学)
固态
材料科学
聚合物电解质
快离子导体
化学工程
碳酸丙烯酯
储能
聚合物
化学
介电谱
碳酸乙烯酯
无机化学
电导率
法拉第效率
电极
锂电池
离子液体
有机化学
复合材料
功率(物理)
物理化学
内分泌学
工程类
物理
医学
量子力学
作者
Mustafa Celik,Abdulkadir Kızılaslan,Mustafa Can,Tugrul Cetinkaya,Hatem Akbulut
标识
DOI:10.1016/j.electacta.2021.137824
摘要
Abstract Among rechargeable lithium batteries, lithium-oxygen batteries (Li-O2) offer remarkable energy densities which make them to be considered as the next generation energy storage systems. However, intrinsic problems arising from the use of liquid electrolytes has to be overcome before their adoption into the market. Gel-polymer electrolytes (GPEs) are now considered as the next-generation electrolytes to be utilized in Li-O2 systems. PVDF-HFP polymers with different lithium salts were successfully utilized as gel-polymer electrolytes to replace liquid electrolytes in Li-O2 batteries. However, the electrochemical performance of different lithium salts dissolved in PVDF-HFP matrices are limited in different aspects, i.e. (electro)chemical stability, ionic conductivity, interfacial stability, cycle stability or lithium-ion transference number. In this study, we systematically observed the effect of different lithium salts at various concentrations on the above mentioned electrochemical properties. Our results indicate that LiPF6 salt imparts best ionic conductivity into GPE systems while LiTFSI has both the widest electrochemical window and highest lithium-ion transference number. Our results indicate that the synthesis of new lithium salts having decent electrochemical performance in all aspects is of great importance in developing GPE systems.
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