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Title: A lithium-sulfur battery with a solution-mediated pathway operating under lean electrolyte conditions

Abstract

Lithium-sulfur (Li-S) battery is one of the most promising candidates for the next generation energy storage systems. However, several barriers, including polysulfide shuttle effect, the slow solid-solid surface reaction pathway in the lower discharge plateau, and corrosion of Li anode still limit its practical applications, especially under the lean electrolyte condition required for high energy density applications. Here, we propose a solution-mediated sulfur reduction pathway to improve the capacity and reversibility of the sulfur cathode and suppress dendrite growth on the Li metal anode simultaneously. With this method, a high coulombic efficiency (99%) and stable cycle life over 100 cycles were achieved under application-relevant conditions (S loading: 6.2 mg cm-2; electrolyte to sulfur ratio: 3 mLE gs-1; sulfur weigh ratio: 72 wt%). This result is enabled by a specially designed Li2S4-rich electrolyte, in which Li2S is formed through a chemical disproportionation reaction instead of electrochemical routes. A diglyme solvent was used to obtain electrolytes with the optimum range of Li2S4 concentration. Operando X-ray absorption spectroscopy confirms the solution pathway in a practical Li-S cell. This solution pathway not only introduces a new electrolyte regime for practical Li-S batteries, but also provides a new perspective for bypassing the inefficient surface pathwaymore » for other electrochemical processes.« less

Authors:
 [1]; ORCiD logo [1];  [1];  [2]; ORCiD logo [1];  [2]; ORCiD logo [1]; ORCiD logo [1];  [1];  [1];  [2]; ORCiD logo [1];  [1]; ORCiD logo [1];  [3];  [4]; ORCiD logo [1];  [5];  [6]; ORCiD logo [1]
  1. BATTELLE (PACIFIC NW LAB)
  2. Lawrence Berkeley National Laboratory
  3. University of Maryland at College Park
  4. Lawrence Berkeley National Laborator
  5. Berkeley National Laboratory
  6. Sandia National Laboratory
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1647576
Report Number(s):
PNNL-SA-143093
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Nano Energy
Additional Journal Information:
Journal Volume: 76
Country of Publication:
United States
Language:
English

Citation Formats

Wang, Hui, Shao, Yuyan, Pan, Huilin, Feng, Xuefei, Chen, Ying, Liu, Yi-Sheng, Walter, Eric D., Engelhard, Mark H., Han, Kee Sung, Deng, Tao, Ren, Guoxi, Lu, Dongping, Lu, Xiaochuan, Xu, Wu, Wang, Chunsheng, Feng, Jun, Mueller, Karl T., Guo, Jinghua, Zavadil, Kevin R., and Zhang, Jiguang. A lithium-sulfur battery with a solution-mediated pathway operating under lean electrolyte conditions. United States: N. p., 2020. Web. doi:10.1016/j.nanoen.2020.105041.
Wang, Hui, Shao, Yuyan, Pan, Huilin, Feng, Xuefei, Chen, Ying, Liu, Yi-Sheng, Walter, Eric D., Engelhard, Mark H., Han, Kee Sung, Deng, Tao, Ren, Guoxi, Lu, Dongping, Lu, Xiaochuan, Xu, Wu, Wang, Chunsheng, Feng, Jun, Mueller, Karl T., Guo, Jinghua, Zavadil, Kevin R., & Zhang, Jiguang. A lithium-sulfur battery with a solution-mediated pathway operating under lean electrolyte conditions. United States. https://doi.org/10.1016/j.nanoen.2020.105041
Wang, Hui, Shao, Yuyan, Pan, Huilin, Feng, Xuefei, Chen, Ying, Liu, Yi-Sheng, Walter, Eric D., Engelhard, Mark H., Han, Kee Sung, Deng, Tao, Ren, Guoxi, Lu, Dongping, Lu, Xiaochuan, Xu, Wu, Wang, Chunsheng, Feng, Jun, Mueller, Karl T., Guo, Jinghua, Zavadil, Kevin R., and Zhang, Jiguang. Thu . "A lithium-sulfur battery with a solution-mediated pathway operating under lean electrolyte conditions". United States. https://doi.org/10.1016/j.nanoen.2020.105041.
@article{osti_1647576,
title = {A lithium-sulfur battery with a solution-mediated pathway operating under lean electrolyte conditions},
author = {Wang, Hui and Shao, Yuyan and Pan, Huilin and Feng, Xuefei and Chen, Ying and Liu, Yi-Sheng and Walter, Eric D. and Engelhard, Mark H. and Han, Kee Sung and Deng, Tao and Ren, Guoxi and Lu, Dongping and Lu, Xiaochuan and Xu, Wu and Wang, Chunsheng and Feng, Jun and Mueller, Karl T. and Guo, Jinghua and Zavadil, Kevin R. and Zhang, Jiguang},
abstractNote = {Lithium-sulfur (Li-S) battery is one of the most promising candidates for the next generation energy storage systems. However, several barriers, including polysulfide shuttle effect, the slow solid-solid surface reaction pathway in the lower discharge plateau, and corrosion of Li anode still limit its practical applications, especially under the lean electrolyte condition required for high energy density applications. Here, we propose a solution-mediated sulfur reduction pathway to improve the capacity and reversibility of the sulfur cathode and suppress dendrite growth on the Li metal anode simultaneously. With this method, a high coulombic efficiency (99%) and stable cycle life over 100 cycles were achieved under application-relevant conditions (S loading: 6.2 mg cm-2; electrolyte to sulfur ratio: 3 mLE gs-1; sulfur weigh ratio: 72 wt%). This result is enabled by a specially designed Li2S4-rich electrolyte, in which Li2S is formed through a chemical disproportionation reaction instead of electrochemical routes. A diglyme solvent was used to obtain electrolytes with the optimum range of Li2S4 concentration. Operando X-ray absorption spectroscopy confirms the solution pathway in a practical Li-S cell. This solution pathway not only introduces a new electrolyte regime for practical Li-S batteries, but also provides a new perspective for bypassing the inefficient surface pathway for other electrochemical processes.},
doi = {10.1016/j.nanoen.2020.105041},
url = {https://www.osti.gov/biblio/1647576}, journal = {Nano Energy},
number = ,
volume = 76,
place = {United States},
year = {2020},
month = {10}
}