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首页> 外文期刊>Journal of power sources >A new lithium salt with 3-fluoro-l,2-benzenediolato and lithium tetrafluoroborate for lithium battery electrolytes
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A new lithium salt with 3-fluoro-l,2-benzenediolato and lithium tetrafluoroborate for lithium battery electrolytes

机译:含3-氟-l,2-苯二醇基和四氟硼酸锂的新型锂盐用于锂电池电解质

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摘要

A new unsymmetrical lithium salt containing F~-, C_6H_3O_2F~(2-) [dianion of 3-fluoro-l,2-benzenediol], lithium difluoro(3-fluoro-l,2-benzene-diolato(2-)-o,o')borate (FLDFBDB) is synthesized and characterized. The thermal characteristics of it, and its derivatives, lithium bis[3-fluoro-l, 2-benzenediolato(2-)-o,o]borate (FLBBB), and lithium fluoroborate (UBF4) are examined by thermogravimetric analysis (TG). The thermal decomposition in air begins at 256 ℃, 185 ℃, and 162℃ for FLBBB, FLDFBDB and LiBF_4, respectively. The order of the stability toward the oxidation of these organoborates is LiBF_4 > FLDFBDB > FLBBB. The cyclic voltammetry study shows that the FLDFBDB solution in propylene carbonate (PC) is stable up to 3.9 V vs. Li~+/Li. It is soluble in common organic solvents. Ionic dissociation properties of FLDFBDB and its derivatives are examined by conductivity measurements in PC, PC+ethyl methyl carbonate (EMC), PC+dimethyl ether (DME), PC + ethylene carbonate (EC )+ DME, PC+EC + EMC solutions. The conductivity values of the 0.10mol dm~(-3) FLDFBDB electrolyte in these solutions are higher than those of FLBBB, but lower than those of LiBF_4 electrolytes.
机译:一种新的不对称锂盐,含F〜-,C_6H_3O_2F〜(2-)[3-氟-1,2-苯二醇的阴离子],二氟锂(3-氟-1,2-苯-二醇基(2-)-o)合成硼酸盐(FLDFBDB)并对其进行表征。通过热重分析(TG)检测了其及其衍生物双[3-氟-1-锂,2-苯二醇基(2-)-o,o]硼酸锂(FLBBB)和氟硼酸锂(UBF4)的热特性。 。 FLBBB,FLDFBDB和LiBF_4分别在256℃,185℃和162℃下在空气中开始热分解。这些有机硼酸酯对氧化的稳定性的顺序为LiBF_4> FLDFBDB> FLBBB。循环伏安法研究表明,在碳酸亚丙酯(PC)中,FLDFBDB溶液在高达3.9 V的条件下相对于Li〜+ / Li稳定。它可溶于常见的有机溶剂。 FLDFBDB及其衍生物的离子离解性能通过在PC,PC +碳酸乙基甲基酯(EMC),PC +碳酸二甲酯(DME),PC +碳酸亚乙酯(EC)+ DME,PC + EC + EMC溶液中的电导率测量进行检查。在这些溶液中,0.10mol dm〜(-3)FLDFBDB电解质的电导率值高于FLBBB,但低于LiBF_4电解质。

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