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An All-Organic Non-aqueous Lithium-Ion Redox Flow Battery

机译:全有机非水锂离子氧化还原液流电池

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摘要

A non-aqueous lithium-ion redox flow battery employing organic molecules is proposed and investigated. 2,5-Di-tert-butyl-1,4-bis(2-methoxyethoxy)benzene and a variety of molecules derived from quinoxaline are employed as initial high-potential and low-potential active materials, respectively. Electrochemical measurements highlight that the choice of electrolyte and of substituent groups can have a significant impact on redox species performance. The charge-discharge characteristics are investigated in a modified coin-cell configuration. After an initial break-in period, coulombic and energy efficiencies for this unoptimized system are ∼70% and ∼37%, respectively, with major charge and discharge plateaus between 1.8-2.4 V and 1.7-1.3 V, respectively, for 30 cycles. Performance enhancements are expected with improvements in cell design and materials processing.
机译:提出并研究了使用有机分子的非水锂离子氧化还原液流电池。 2,5-二叔丁基-1,4-双(2-甲氧基乙氧基)苯和衍生自喹喔啉的各种分子分别用作初始的高电势和低电势活性材料。电化学测量结果表明,电解质和取代基的选择会对氧化还原物质的性能产生重大影响。在改进的纽扣电池配置中研究了充放电特性。经过最初的磨合期后,此未优化系统的库仑效率和能量效率分别为〜70%和〜37%,主要充电和放电平稳期分别在1.8-2.4 V和1.7-1.3 V之间,持续30个周期。随着电池设计和材料处理的改进,性能有望得到提高。

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