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Title: Interaction of CuS and sulfur in Li-S battery system

Abstract

Lithium-Sulfur (Li-S) battery has been a subject of intensive research in recent years due to its potential to provide much higher energy density and lower cost than the current state of the art lithiumion battery technology. In this work, we have investigated Cupric Sulfide (CuS) as a capacitycontributing conductive additive to the sulfur electrode in a Li-S battery. Galvanostatic charge/discharge cycling has been used to compare the performance of both sulfur electrodes and S:CuS hybrid electrodes with various ratios. We found that the conductive CuS additive enhanced the utilization of the sulfur cathode under a 1C rate discharge. However, under a C/10 discharge rate, S:CuS hybrid electrodes exhibited lower sulfur utilization in the first discharge and faster capacity decay in later cycles than a pure sulfur electrode due to the dissolution of CuS. The CuS dissolution is found to be the result of strong interaction between the soluble low order polysulfide Li 2S 3 and CuS. As a result, we identified the presence of conductive copper-containing sulfides at the cycled lithium anode surface, which may degrade the effectiveness of the passivation function of the solid-electrolyte-interphase (SEI) layer, accounting for the poor cycling performance of the S:CuS hybrid cells at lowmore » rate.« less

Authors:
 [1];  [1];  [2];  [1];  [2];  [2];  [3];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Stony Brook Univ., NY (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1232689
Report Number(s):
BNL-108540-2015-JA
Journal ID: ISSN 0013-4651; YN0100000
Grant/Contract Number:  
SC00112704
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 162; Journal Issue: 14; Journal ID: ISSN 0013-4651
Publisher:
The Electrochemical Society
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; conductive filler; copper sulfides; hybrid electrode; lithium sulfur battery; polysulfide; SEI

Citation Formats

Sun, Ke, Su, Dong, Zhang, Qing, Bock, David C., Marschilok, Amy C., Takeuchi, Kenneth J., Takeuchi, Esther S., and Gan, Hong. Interaction of CuS and sulfur in Li-S battery system. United States: N. p., 2015. Web. doi:10.1149/2.1021514jes.
Sun, Ke, Su, Dong, Zhang, Qing, Bock, David C., Marschilok, Amy C., Takeuchi, Kenneth J., Takeuchi, Esther S., & Gan, Hong. Interaction of CuS and sulfur in Li-S battery system. United States. doi:10.1149/2.1021514jes.
Sun, Ke, Su, Dong, Zhang, Qing, Bock, David C., Marschilok, Amy C., Takeuchi, Kenneth J., Takeuchi, Esther S., and Gan, Hong. Tue . "Interaction of CuS and sulfur in Li-S battery system". United States. doi:10.1149/2.1021514jes. https://www.osti.gov/servlets/purl/1232689.
@article{osti_1232689,
title = {Interaction of CuS and sulfur in Li-S battery system},
author = {Sun, Ke and Su, Dong and Zhang, Qing and Bock, David C. and Marschilok, Amy C. and Takeuchi, Kenneth J. and Takeuchi, Esther S. and Gan, Hong},
abstractNote = {Lithium-Sulfur (Li-S) battery has been a subject of intensive research in recent years due to its potential to provide much higher energy density and lower cost than the current state of the art lithiumion battery technology. In this work, we have investigated Cupric Sulfide (CuS) as a capacitycontributing conductive additive to the sulfur electrode in a Li-S battery. Galvanostatic charge/discharge cycling has been used to compare the performance of both sulfur electrodes and S:CuS hybrid electrodes with various ratios. We found that the conductive CuS additive enhanced the utilization of the sulfur cathode under a 1C rate discharge. However, under a C/10 discharge rate, S:CuS hybrid electrodes exhibited lower sulfur utilization in the first discharge and faster capacity decay in later cycles than a pure sulfur electrode due to the dissolution of CuS. The CuS dissolution is found to be the result of strong interaction between the soluble low order polysulfide Li2S3 and CuS. As a result, we identified the presence of conductive copper-containing sulfides at the cycled lithium anode surface, which may degrade the effectiveness of the passivation function of the solid-electrolyte-interphase (SEI) layer, accounting for the poor cycling performance of the S:CuS hybrid cells at low rate.},
doi = {10.1149/2.1021514jes},
journal = {Journal of the Electrochemical Society},
number = 14,
volume = 162,
place = {United States},
year = {2015},
month = {10}
}

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Cited by: 19 works
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