氟
锂(药物)
电解质
化学
衍生工具(金融)
分解
无机化学
电极
物理化学
有机化学
医学
金融经济学
内分泌学
经济
作者
Yukio Sasaki,Gengo Shimazaki,Noritoshi Nanbu,Masahiro Takehara,Makoto Ue
出处
期刊:ECS transactions
[The Electrochemical Society]
日期:2009-05-01
卷期号:16 (35): 23-31
被引量:18
摘要
This paper investigated the physical and electrolytic properties, and charge-discharge characteristics for secondary lithium batteries of partially fluorinated 1-ethoxy-2-methoxyethane (EME) and 1,2-diethoxyethane (DEE) derivatives newly synthesized by us. Dielectric constants of fluorinated EME and DEE derivatives are almost independent of the number of fluorine atom. Viscosities of the fluorinated derivatives with three fluorine atoms are not affected by the molecular weights of them. Donor numbers of the fluorinated derivatives were estimated by 29Si NMR chemical shifts of triphenylsilanol. Conductivities of the fluorinated derivatives are dependent on the donor numbers of them. Oxidative decomposition voltages tend to increase with increasing the number of fluorine atom. EC-based equimolar binary derivative solutions with three fluorine atoms show higher lithium electrode cycling efficiencies. In general, EC-based fluorinated EME and DEE derivative solutions show higher discharge capacities and cycling efficiencies for Li | LiCoO2 cells.
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