Sebastian Klick, Karl Martin Graff, Gereon Stahl, Egbert Figgemeier, Dirk Uwe Sauer
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引用次数: 0
Abstract
The SEI is a crucial yet little understood component of lithium-ion batteries. The specific formation processes creating the SEI are still a matter of current research. In our paper, we analyse the electrochemical processes by incremental capacity analysis (ICA) and correlate these results with the evolved gas species and subsequent performance of the cells. 101 cells in total divided in three groups with different electrolytes performed a formation cycle. Afterwards gas-samples of half of the cells were extracted for analysis. We found a good correlation between variations of gas composition and noticeable ICA-data. Furthermore we explore correlations between formation and initial cell performance after a total of 10 cycles. Our results open new possibilities for a better understanding of formation processes.
SEI 是锂离子电池的重要组成部分，但人们对其了解甚少。产生 SEI 的具体形成过程仍是当前的研究课题。在本文中，我们通过增量容量分析（ICA）对电化学过程进行了分析，并将这些结果与演化出的气体种类和电池的后续性能联系起来。总共 101 个电池分为三组，使用不同的电解质进行了一次形成循环。之后，我们提取了一半电池的气体样本进行分析。我们发现气体成分的变化与明显的 ICA 数据之间存在良好的相关性。此外，我们还探索了 10 个循环后电池形成与初始性能之间的相关性。我们的研究结果为更好地了解形成过程提供了新的可能性。
期刊介绍：
Electrochemical energy storage devices play a transformative role in our societies. They have allowed the emergence of portable electronics devices, have triggered the resurgence of electric transportation and constitute key components in smart power grids. Batteries & Supercaps publishes international high-impact experimental and theoretical research on the fundamentals and applications of electrochemical energy storage. We support the scientific community to advance energy efficiency and sustainability.
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