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ANALYTICAL TECHNIQUES FOR Li-S BATTERIES

机译：锂电池的分析技术

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摘要

Lithium sulfur rechargeable batteries are foreseen to be used in electric vehicles in the near future. To enable their placement to the market we need to improve their reliability and cycling performance. This can be done by selective change of the chemical environment in the Li-S battery, including electrolyte (solvents and salts), different combinations of cathode composites and different additives. With an aim to understand differences between different chemical environments, suitable and reliable analytical techniques that can effectively monitor the changes of interest, should be developed. In this work we present two newly developed analytical techniques which are capable to detect quantitative and qualitative differences between different polysulfide species in the electrolyte. More specifically, both proposed techniques can detect the polysulfides that have diffused away from the cathode composite. With a modified 4-electrode Swagelok cell we can quantitatively determine the amount of such polysulfides, while an in-situ UV-Vis cell gives us information about the composition of these polysulfides. Combining these techniques with a classical galvanostatic cycling method could lead to a better understanding, consequently, a faster tuning of Li-S battery properties.
机译：预计锂硫可充电电池将在不久的将来用于电动汽车。为了使它们投放市场，我们需要提高其可靠性和循环性能。这可以通过有选择地改变Li-S电池中的化学环境来完成，包括电解质（溶剂和盐），阴极复合材料的不同组合和不同的添加剂。为了理解不同化学环境之间的差异，应该开发可以有效监控目标变化的合适且可靠的分析技术。在这项工作中，我们介绍了两种最新开发的分析技术，它们能够检测电解质中不同多硫化物种类之间的定量和定性差异。更具体地，两种提出的技术都可以检测已经从阴极复合材料扩散开的多硫化物。使用改良的4电极世伟洛克（Swagelok）电池，我们可以定量地确定此类多硫化物的量，而原位UV-Vis电池则为我们提供了有关这些多硫化物组成的信息。将这些技术与经典的恒电流循环方法结合在一起可以更好地理解锂离子电池的性能。

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  • 会议地点 Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US)
  • 作者

    Manu U.M. Patel; Rezan DEMIR CAKAN; Mathieu MORCRETTE; Jean-Marie TARASCON; Miran GABERSCEK; Robert DOMINKO;

  • 作者单位

    National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia ALISTORE-ERI, 33 Rue Saint-Leu, 80039 Amiens, France LRCS, Universite de Picardie Jules Verne, 33 Rue Saint-Leu, 80039 Amiens, France;

    National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia ALISTORE-ERI, 33 Rue Saint-Leu, 80039 Amiens, France LRCS, Universite de Picardie Jules Verne, 33 Rue Saint-Leu, 80039 Amiens, France;

    National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia ALISTORE-ERI, 33 Rue Saint-Leu, 80039 Amiens, France LRCS, Universite de Picardie Jules Verne, 33 Rue Saint-Leu, 80039 Amiens, France;

    National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia ALISTORE-ERI, 33 Rue Saint-Leu, 80039 Amiens, France LRCS, Universite de Picardie Jules Verne, 33 Rue Saint-Leu, 80039 Amiens, France;

    National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia ALISTORE-ERI, 33 Rue Saint-Leu, 80039 Amiens, France LRCS, Universite de Picardie Jules Verne, 33 Rue Saint-Leu, 80039 Amiens, France;

    National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia ALISTORE-ERI, 33 Rue Saint-Leu, 80039 Amiens, France LRCS, Universite de Picardie Jules Verne, 33 Rue Saint-Leu, 80039 Amiens, France;

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