Direct Observation of Sulfur Radicals as Reaction Media in Lithium Sulfur Batteries
Abstract
Lithium sulfur (Li-S) battery has been regaining tremendous interest in recent years because of its attractive attributes such as high gravimetric energy, low cost and environmental benignity. However, it is still not conclusively known how polysulfide ring/chain participates in the whole cycling and whether the discharge and charge processes follow the same pathway. Herein, we demonstrate the direct observation of sulfur radicals by using in situ electron paramagnetic resonance (EPR) technique. Based on the concentration changes of sulfur radicals at different potentials and the electrochemical characteristics of the cell, it is revealed that the chemical and electrochemical reactions in Li-S cell are driving each other to proceed through sulfur radicals, leading to two completely different reaction pathways during discharge and charge. The proposed radical mechanism may provide new perspectives to investigate the interactions between sulfur species and the electrolyte, inspiring novel strategies to develop Li-S battery technology.
- Authors:
-
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- School of Ocean and Earth Science and Technology, Hawaii Natural Energy Institute, (United States)
- Brookhaven National Laboratory, Upton, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1169566
- Report Number(s):
- BNL-107393-2015-JA
Journal ID: ISSN 0013-4651; R&D Project: MA453MAEA; VT1201000
- Grant/Contract Number:
- SC00112704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of the Electrochemical Society
- Additional Journal Information:
- Journal Volume: 162; Journal Issue: 3; Journal ID: ISSN 0013-4651
- Publisher:
- The Electrochemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE
Citation Formats
Wang, Qiang, Zheng, Jianming, Walter, Eric, Pan, Huilin, Lv, Dongping, Zuo, Pengjian, Chen, Honghao, Deng, Z. D., Liaw, Bor Y., Yu, Xiqian, Yang, Xiao-Qing, Zhang, Ji-Guang, Liu, Jun, and Xiao, Jie. Direct Observation of Sulfur Radicals as Reaction Media in Lithium Sulfur Batteries. United States: N. p., 2015.
Web. doi:10.1149/2.0851503jes.
Wang, Qiang, Zheng, Jianming, Walter, Eric, Pan, Huilin, Lv, Dongping, Zuo, Pengjian, Chen, Honghao, Deng, Z. D., Liaw, Bor Y., Yu, Xiqian, Yang, Xiao-Qing, Zhang, Ji-Guang, Liu, Jun, & Xiao, Jie. Direct Observation of Sulfur Radicals as Reaction Media in Lithium Sulfur Batteries. United States. https://doi.org/10.1149/2.0851503jes
Wang, Qiang, Zheng, Jianming, Walter, Eric, Pan, Huilin, Lv, Dongping, Zuo, Pengjian, Chen, Honghao, Deng, Z. D., Liaw, Bor Y., Yu, Xiqian, Yang, Xiao-Qing, Zhang, Ji-Guang, Liu, Jun, and Xiao, Jie. Fri .
"Direct Observation of Sulfur Radicals as Reaction Media in Lithium Sulfur Batteries". United States. https://doi.org/10.1149/2.0851503jes. https://www.osti.gov/servlets/purl/1169566.
@article{osti_1169566,
title = {Direct Observation of Sulfur Radicals as Reaction Media in Lithium Sulfur Batteries},
author = {Wang, Qiang and Zheng, Jianming and Walter, Eric and Pan, Huilin and Lv, Dongping and Zuo, Pengjian and Chen, Honghao and Deng, Z. D. and Liaw, Bor Y. and Yu, Xiqian and Yang, Xiao-Qing and Zhang, Ji-Guang and Liu, Jun and Xiao, Jie},
abstractNote = {Lithium sulfur (Li-S) battery has been regaining tremendous interest in recent years because of its attractive attributes such as high gravimetric energy, low cost and environmental benignity. However, it is still not conclusively known how polysulfide ring/chain participates in the whole cycling and whether the discharge and charge processes follow the same pathway. Herein, we demonstrate the direct observation of sulfur radicals by using in situ electron paramagnetic resonance (EPR) technique. Based on the concentration changes of sulfur radicals at different potentials and the electrochemical characteristics of the cell, it is revealed that the chemical and electrochemical reactions in Li-S cell are driving each other to proceed through sulfur radicals, leading to two completely different reaction pathways during discharge and charge. The proposed radical mechanism may provide new perspectives to investigate the interactions between sulfur species and the electrolyte, inspiring novel strategies to develop Li-S battery technology.},
doi = {10.1149/2.0851503jes},
journal = {Journal of the Electrochemical Society},
number = 3,
volume = 162,
place = {United States},
year = {Fri Jan 09 00:00:00 EST 2015},
month = {Fri Jan 09 00:00:00 EST 2015}
}
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