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首页> 外文期刊>RSC Advances >BF3-promoted electrochemical properties of quinoxaline in propylene carbonate
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BF3-promoted electrochemical properties of quinoxaline in propylene carbonate

机译：BF3促进碳酸丙烷喹喔啉的电化学性质

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摘要

Electrochemical and density functional studies demonstrate that coordination of electrolyte constituents to quinoxalines modulates their electrochemical properties. Quinoxalines are shown to be electrochemically inactive in most electrolytes in propylene carbonate, yet the predicted reduction potential is shown to match computational estimates in acetonitrile. We find that in the presence of LiBF4 and trace water, an adduct is formed between quinoxaline and the Lewis acid BF3, which then displays electrochemical activity at 1-1.5 V higher than prior observations of quinoxaline electrochemistry in non-aqueous media. Direct synthesis and testing of a bis-BF3 quinoxaline complex further validates the assignment of the electrochemically active species, presenting up to a similar to 26-fold improvement in charging capacity, demonstrating the advantages of this adduct over unmodified quinoxaline in LiBF4-based electrolyte. The use of Lewis acids to effectively "turn on" the electrochemical activity of organic molecules may lead to the development of new active material classes for energy storage applications.
机译：电化学和密度功能研究表明，电解质成分与喹喔啉的协调调节其电化学性质。喹喔啉在碳酸亚丙酯中大多数电解质中被电化学无活性，但是预测的降低电位显示在乙腈中匹配计算估计。我们发现在Libf4和痕量水的情况下，在喹喔啉和路易斯酸BF3之间形成加合物，然后在非水介质中的喹喔啉电化学的前观察结果高出1-1.5V的电化学活性。直接合成和测试BIS-BF3喹喔啉络合物进一步验证了电化学活性物质的分配，呈现出相似的充电能力的增加，提高了26倍的充电能力，展示了这种加合物在基于LibF4的电解质中未改性喹喔啉的优点。使用路易斯酸有效地“开启”有机分子的电化学活性可能导致开发用于能量储存应用的新型活性材料等级。

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