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Authors
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Guo, J. ; Omar, A. ; Urbanski, A. ; Oswald, S. ; Uhlmann, P. ; Giebeler, L.
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Title
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Electrochemical Behavior of Microparticulate Silicon Anodes in Ether-Based Electrolytes: Why Does LiNO3 Affect Negatively?
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Date
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15.05.2019
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Number
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56894
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Abstract
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Silicon has great potential to be applied as an alternative anode in lithium-ion batteries. However, the electrochemical performance of silicon anodes in ether-based electrolytes, which is essential for better understanding the electrochemistry of sulfur/silicon full cells, has not been fully investigated. In this work, the effect of ether-based electrolytes on the cycling performance and surface chemistry of silicon electrodes containing microsized particles was systematically studied. In LiNO3-containing ether-based electrolyte, silicon electrode showed the fastest capacity fading and the shortest cycle life. Electrochemical impedance spectroscopy, scanning electron microscope, and X-ray photoelectron spectroscopy were employed to examine the solid electrolyte interphase (SEI) properties of silicon microparticles. An unfavorable SEI is responsible for poor cycling performance in ether-based electrolytes. Our results shed new light on the reason for short cycle life of most of the reported sulfur/silicon full cells.
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Publisher
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ACS Applied Energy Materials
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Wikidata
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Citation
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ACS Applied Energy Materials 2 (2019) 4411-4420
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DOI
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https://doi.org/10.1021/ACSAEM.9B00590
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