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LiFePO4/Mesoporous Carbon Hybrid Supercapacitor Based on LiTFSI/Imidazolium Ionic Liquid Electrolyte
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2018-01-16 00:00:00 , DOI: 10.1021/acs.jpcc.7b09869 Paulo F. R. Ortega 1, 2 , Garbas A. dos Santos Junior 1 , Luciano A. Montoro 1 , Glaura G. Silva 1 , Clara Blanco 3 , Ricardo Santamaría 3 , Rodrigo L. Lavall 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2018-01-16 00:00:00 , DOI: 10.1021/acs.jpcc.7b09869 Paulo F. R. Ortega 1, 2 , Garbas A. dos Santos Junior 1 , Luciano A. Montoro 1 , Glaura G. Silva 1 , Clara Blanco 3 , Ricardo Santamaría 3 , Rodrigo L. Lavall 1
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A hybrid SC prepared with mesoporous carbon as the negative electrode, LiFePO4 as the positive electrode, and a LiTFSI/imidazolium ionic liquid solution as electrolyte is presented. The cell was conceived on the basis that it offers all of the safety features of ionic liquids (IL) and LiFePO4, in addition to the advantages of a high energy density device. Most of the high performance hybrids so far reported in the literature employ aqueous or organic electrolytes, whereas studies of hybrid cells based on IL are still rare. Here, a fundamental study was conducted to understand how the different interfaces and mechanisms operate in a hybrid system based on IL electrolyte and how this affects cell performance. This device was mainly characterized using cyclic chronopotentiometry that allows cell voltage and electrode potentials to be simultaneously recorded. By means of this technique, it was possible to evaluate the overall behavior of the hybrid cell and the faradaic and capacitive electrodes simultaneously and to compare it with the performance of selected standard cells. The results show that the cell is able to attain an energy density of 43.3 W h kg–1 at 0.010 A g–1 (C/5 in relation to LiFePO4), while maintaining a good cycling performance.
中文翻译：
基于LiTFSI /咪唑鎓离子液体电解质的LiFePO 4 /介孔碳杂化超级电容器
提出了一种以中孔碳为负极，LiFePO 4为正极，LiTFSI /咪唑鎓离子液体溶液为电解质的混合SC 。该电池的设计基于提供离子液体（IL）和LiFePO 4的所有安全功能，除了具有高能量密度设备的优点。迄今为止，文献中报道的大多数高性能杂种均使用水性或有机电解质，而基于IL的杂种细胞的研究仍然很少。在这里，进行了一项基础研究，以了解不同界面和机制如何在基于IL电解质的混合系统中运行，以及这如何影响电池性能。该设备的主要特点是使用循环计时电位法，可以同时记录电池电压和电极电位。通过这种技术，可以同时评估混合电池以及法拉第电极和电容电极的整体性能，并将其与所选标准电池的性能进行比较。-1 0.010 A G -1（C / 5相对于的LiFePO 4），同时保持良好的循环性能。
更新日期：2018-01-16
中文翻译：
基于LiTFSI /咪唑鎓离子液体电解质的LiFePO 4 /介孔碳杂化超级电容器
提出了一种以中孔碳为负极，LiFePO 4为正极，LiTFSI /咪唑鎓离子液体溶液为电解质的混合SC 。该电池的设计基于提供离子液体（IL）和LiFePO 4的所有安全功能，除了具有高能量密度设备的优点。迄今为止，文献中报道的大多数高性能杂种均使用水性或有机电解质，而基于IL的杂种细胞的研究仍然很少。在这里，进行了一项基础研究，以了解不同界面和机制如何在基于IL电解质的混合系统中运行，以及这如何影响电池性能。该设备的主要特点是使用循环计时电位法，可以同时记录电池电压和电极电位。通过这种技术，可以同时评估混合电池以及法拉第电极和电容电极的整体性能，并将其与所选标准电池的性能进行比较。-1 0.010 A G -1（C / 5相对于的LiFePO 4），同时保持良好的循环性能。
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