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High Lithium Transference Number Electrolytes Containing Tetratriflylpropene’s Lithium Salt
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2018-08-02 00:00:00 , DOI: 10.1021/acs.jpclett.8b01846 J. Popovic 1 , D. Höfler 2 , J. P. Melchior 1 , A. Münchinger 1 , B. List 2 , J. Maier 1
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2018-08-02 00:00:00 , DOI: 10.1021/acs.jpclett.8b01846 J. Popovic 1 , D. Höfler 2 , J. P. Melchior 1 , A. Münchinger 1 , B. List 2 , J. Maier 1
Affiliation
Electrolytes with a high lithium transference number linked with high ionic conductivity are urgently needed for high power battery operation. In this work, we present newly synthesized lithium tetra(trifluoromethanesulfonyl)propene as a salt-in-glyme-based “salt-in-solvent” electrolyte. We employ impedance spectroscopy in symmetric Li/electrolyte/Li cells and pulsed field gradient nuclear magnetic resonance spectroscopy to investigate the lithium conduction mechanism. We find predominant lithium conductivity with very high lithium transference numbers (∼70% from the polarization experiments) and three times higher ionic conductivity compared to well-known lithium triflate in diglyme electrolyte. This is a consequence of the reduced mobilities of large anions linked with improved ionic dissociation.
中文翻译:
含有四三氟丙烯的锂盐的高锂转移数电解质
高功率电池运行迫切需要具有高锂转移数和高离子电导率的电解质。在这项工作中,我们介绍了新合成的四(三氟甲磺酰基)丙烯锂,它是一种基于盐的基于乙二醇盐的“溶剂中盐”电解质。我们在对称的Li /电解质/ Li电池中采用阻抗光谱法和脉冲场梯度核磁共振光谱法研究锂的传导机理。我们发现,与已知的二甘醇二甲醚电解质中的三氟甲磺酸锂相比,锂电导率非常高(锂离子迁移率约为70%),离子电导率是三倍高。这是大阴离子迁移率降低与离子离解性提高相关的结果。
更新日期:2018-08-02
中文翻译:
含有四三氟丙烯的锂盐的高锂转移数电解质
高功率电池运行迫切需要具有高锂转移数和高离子电导率的电解质。在这项工作中,我们介绍了新合成的四(三氟甲磺酰基)丙烯锂,它是一种基于盐的基于乙二醇盐的“溶剂中盐”电解质。我们在对称的Li /电解质/ Li电池中采用阻抗光谱法和脉冲场梯度核磁共振光谱法研究锂的传导机理。我们发现,与已知的二甘醇二甲醚电解质中的三氟甲磺酸锂相比,锂电导率非常高(锂离子迁移率约为70%),离子电导率是三倍高。这是大阴离子迁移率降低与离子离解性提高相关的结果。