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Wu HL, Huff LA, Esbenshade JL, et al. In Situ EQCM Study Examining Irreversible Changes the Sulfur-Carbon Cathode in Lithium-Sulfur Batteries. ACS Appl Mater Interfaces. 2015;7(37):20820-8doi: 10.1021/acsami.5b05955.
Wu, H. L., Huff, L. A., Esbenshade, J. L., & Gewirth, A. A. (2015). In Situ EQCM Study Examining Irreversible Changes the Sulfur-Carbon Cathode in Lithium-Sulfur Batteries. ACS applied materials & interfaces, 7(37), 20820-8. https://doi.org/10.1021/acsami.5b05955
Wu, Heng-Liang, et al. "In Situ EQCM Study Examining Irreversible Changes the Sulfur-Carbon Cathode in Lithium-Sulfur Batteries." ACS applied materials & interfaces vol. 7,37 (2015): 20820-8. doi: https://doi.org/10.1021/acsami.5b05955
Wu HL, Huff LA, Esbenshade JL, Gewirth AA. In Situ EQCM Study Examining Irreversible Changes the Sulfur-Carbon Cathode in Lithium-Sulfur Batteries. ACS Appl Mater Interfaces. 2015 Sep 23;7(37):20820-8. doi: 10.1021/acsami.5b05955. Epub 2015 Sep 09. PMID: 26317893.
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ACS Appl Mater Interfaces. 2015 Sep 23;7(37):20820-8. doi: 10.1021/acsami.5b05955. Epub 2015 Sep 09.

In Situ EQCM Study Examining Irreversible Changes the Sulfur-Carbon Cathode in Lithium-Sulfur Batteries.

ACS applied materials & interfaces

Heng-Liang Wu, Laura A Huff, Jennifer L Esbenshade, Andrew A Gewirth

Affiliations

  1. Department of Chemistry, University of Illinois at Urbana-Champaign , 600 S. Mathews Avenue, Urbana, Illinois 61801, United States.

PMID: 26317893 DOI: 10.1021/acsami.5b05955

Abstract

In situ EQCM experiments were used to investigate the stability and roughness changes occurring in a sulfur-carbon cathode utilized for a Li-S battery during the charge-discharge process. Results show that the sulfur-carbon cathode gains mass during the first discharge plateau (∼2.4 V) due to the formation of the long chain polysulfides during the discharge (lithiation) process. However, further discharge to below 2.4 V yields an increase in the crystal resistance (Rc) suggesting the sulfur-carbon cathode becomes rougher. During the charge (delithiation) process, the roughness of the sulfur-carbon cathode decreases. Time dependent measurements show that the electrode surface becomes rougher with the deeper discharge, with the change occurring following a step to 1.5 V. The sulfur-carbon cathode exhibits stable Rc and frequency behavior initially, but then becomes rougher in subsequent following cycles.

Keywords: EQCM; Li−S batteries; crystal resistance; polysulfide dissolution; roughness of the sulfur−carbon cathode

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