用于镀钙的干燥无污染Ca(BF4)2基电解质

IF 5.4 Q2 CHEMISTRY, PHYSICAL
Juan D. Forero-Saboya , Matic Lozinšek , Alexandre Ponrouch
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引用次数: 6

摘要

与商用锂离子电池相比,金属钙阳极电池具有更高的理论容量,近年来备受关注。然而,金属钙的电沉积是具有挑战性的,目前只有少数报道的有机电解质允许可逆电镀/剥离,包括在碳酸盐溶剂中的Ca(BF4)2。许多商业盐作为水合物出售,Ca(BF4)2就是这种情况,然而,二价金属阳离子有机电解质的干燥不是微不足道的。本文探讨了几种干燥BF4−基电解质的方法。结果表明,在某些产生杂质的干燥过程中,四氟硼酸盐阴离子容易被水解,因此,有必要在无水条件下制备盐,以确保低水和低污染物含量。提出了两种不同的合成路线作为商业水合盐的替代品。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Towards dry and contaminant free Ca(BF4)2-based electrolytes for Ca plating

Towards dry and contaminant free Ca(BF4)2-based electrolytes for Ca plating

Calcium-metal-anode based batteries have recently gained much attention owing to their higher theoretical capacity when compared to the commercial lithium-ion cells. However, electrodeposition of metallic calcium is challenging and currently there is only a few reported organic electrolytes allowing reversible plating/stripping, including Ca(BF4)2 in carbonate solvents. Many of the commercial salts are sold as hydrates, which is the case of Ca(BF4)2, however the drying of a divalent-metal cation organic electrolyte is not trivial. Herein, several procedures for drying BF4-based electrolytes are explored and discussed. It is shown that the tetrafluoroborate anion can easily get hydrolyzed during some drying protocols producing impurities, and thus, it is necessary to prepare the salt in anhydrous conditions to ensure low water and contaminant contents. Two different synthetic routes are presented as alternatives to the commercial hydrated salt.

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来源期刊
CiteScore
9.10
自引率
0.00%
发文量
18
审稿时长
64 days
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