聚氧化乙烯
电解质
极化(电化学)
环氧乙烷
盐(化学)
氧化物
锂(药物)
无机化学
硼酸锂
化学
扩散
材料科学
硼
电极
热力学
有机化学
物理化学
物理
聚合物
医学
硼酸盐玻璃
共聚物
内分泌学
作者
M. Hiller,M. Joost,H. J. Gores,Stefano Passerini,Hans‐Dieter Wiemhöfer
标识
DOI:10.1016/j.electacta.2013.09.138
摘要
Abstract Lithium transference numbers, salt diffusion coefficients and effective lithium conductivities are investigated with the steady state polarization method for poly(ethylene oxide) (PEO) based polymer electrolytes containing lithium bis(oxalato)borate (LiBOB) or lithium bis(trifluoromethanesulfonyl)imide (LiTFSI). We compare the commonly used evaluation technique with our approach. Here, the focus is laid on the potential relaxation of the polarized sample which delivers information about the salt diffusion and the potential distribution in symmetric Li/electrolyte/Li cell. The new approach circumvents the well-known initial current issue and thus increases the reliability of the experiment. The temperature dependence of the lithium transference numbers and the importance of data acquisition time are also discussed. The highest lithium transference numbers are 0.19 for P(EO) 60 ·LiTFSI at 90 °C.
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