当前位置: X-MOL 学术J. Am. Chem. Soc. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Supramolecular Regulation of Anions Enhances Conductivity and Transference Number of Lithium in Liquid Electrolytes
Journal of the American Chemical Society ( IF 15.0 ) Pub Date : 2018-07-17 , DOI: 10.1021/jacs.8b05915
Bo Qiao 1 , Graham M. Leverick 2 , Wei Zhao 3 , Amar H. Flood 3 , Jeremiah A. Johnson 4 , Yang Shao-Horn 2
Affiliation  

Achieving high ionic conductivity in lithium-ion battery (LIB) electrolytes requires dissociation of Li-salts; however, though the generation of free Li+ from salt dissociation is advantageous, the presence of freely diffusing anions may reduce the Li+ transference number. The use of supramolecular anion recognition to regulate and modify ion-pairing and diffusion of anions in battery electrolytes is yet to be deeply understood. Herein, we demonstrate that addition of a selective and strong PF6--binding macrocycle to a solution of LiPF6 in low dielectric media leads to enhanced ion pair dissociation and an increased Li+ transference number. This work provides a well-defined model system to study the effects of anion binding in battery electrolytes.

中文翻译:

阴离子的超分子调控提高了液体电解质中锂的电导率和转移数

在锂离子电池 (LIB) 电解质中实现高离子电导率需要锂盐的解离;然而,尽管盐解离产生游离 Li+ 是有利的,但自由扩散的阴离子的存在可能会降低 Li+ 转移数。使用超分子阴离子识别来调节和修改电池电解质中阴离子的离子配对和扩散还有待深入理解。在此,我们证明在低介电介质中的 LiPF6 溶液中添加选择性和强 PF6 结合大环可导致离子对解离增强和 Li+ 转移数增加。这项工作提供了一个定义明确的模型系统来研究电池电解质中阴离子结合的影响。
更新日期:2018-07-17
down
wechat
bug