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Title: Chemical Immobilization and Conversion of Active Polysulfides Directly by Copper Current Collector: A New Approach to Enabling Stable Room-Temperature Li-S and Na-S Batteries

Here, room–temperature Li/Na–S batteries are promising energy storage solutions, but unfortunately suffer from serious cycling problems rooted in their polysulfide intermediates. The conventional strategy to tackle this issue is to design host materials for trapping polysulfides via weak physical confinement and interfacial chemical interactions. Even though beneficial, their capability for the polysulfide immobilization is still limited. Herein, the unique sulfiphilic nature of metallic Cu is revisited. Upon the exposure to polysulfide in aqueous or aprotic solution, the surface sulfidization rapidly takes place, resulting in the formation of Cu 2S nanoflake arrays with tunable texture. When the sulfidized Cu current collector is directly used as the sulfur–equivalent cathode, it enables high–performance Li/Na–S batteries at room temperature with reasonable high sulfur loading. Specific capacities up to ≈1200 mAh g –1 for Li–S and ≈400 mAh g –1 for Na–S are measured when normalized to the amount of equivalent sulfur, and can be readily sustained for >1000 cycles.
Authors:
 [1] ;  [2] ;  [2] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ; ORCiD logo [2]
  1. Soochow Univ., Suzhou (China)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Advanced Energy Materials
Additional Journal Information:
Journal Volume: 8; Journal Issue: 22; Journal ID: ISSN 1614-6832
Publisher:
Wiley
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Li-S batteries; Na-S batteries; chemical immobilization of polysulfide; sulfiphilic Cu foam; sulfur-equivalent cathodes
OSTI Identifier:
1480523
Alternate Identifier(s):
OSTI ID: 1437316

Li, Peirong, Ma, Lu, Wu, Tianpin, Ye, Hualin, Zhou, Junhua, Zhao, Feipeng, Han, Na, Wang, Yeyun, Wu, Yunling, Li, Yanguang, and Lu, Jun. Chemical Immobilization and Conversion of Active Polysulfides Directly by Copper Current Collector: A New Approach to Enabling Stable Room-Temperature Li-S and Na-S Batteries. United States: N. p., Web. doi:10.1002/aenm.201800624.
Li, Peirong, Ma, Lu, Wu, Tianpin, Ye, Hualin, Zhou, Junhua, Zhao, Feipeng, Han, Na, Wang, Yeyun, Wu, Yunling, Li, Yanguang, & Lu, Jun. Chemical Immobilization and Conversion of Active Polysulfides Directly by Copper Current Collector: A New Approach to Enabling Stable Room-Temperature Li-S and Na-S Batteries. United States. doi:10.1002/aenm.201800624.
Li, Peirong, Ma, Lu, Wu, Tianpin, Ye, Hualin, Zhou, Junhua, Zhao, Feipeng, Han, Na, Wang, Yeyun, Wu, Yunling, Li, Yanguang, and Lu, Jun. 2018. "Chemical Immobilization and Conversion of Active Polysulfides Directly by Copper Current Collector: A New Approach to Enabling Stable Room-Temperature Li-S and Na-S Batteries". United States. doi:10.1002/aenm.201800624.
@article{osti_1480523,
title = {Chemical Immobilization and Conversion of Active Polysulfides Directly by Copper Current Collector: A New Approach to Enabling Stable Room-Temperature Li-S and Na-S Batteries},
author = {Li, Peirong and Ma, Lu and Wu, Tianpin and Ye, Hualin and Zhou, Junhua and Zhao, Feipeng and Han, Na and Wang, Yeyun and Wu, Yunling and Li, Yanguang and Lu, Jun},
abstractNote = {Here, room–temperature Li/Na–S batteries are promising energy storage solutions, but unfortunately suffer from serious cycling problems rooted in their polysulfide intermediates. The conventional strategy to tackle this issue is to design host materials for trapping polysulfides via weak physical confinement and interfacial chemical interactions. Even though beneficial, their capability for the polysulfide immobilization is still limited. Herein, the unique sulfiphilic nature of metallic Cu is revisited. Upon the exposure to polysulfide in aqueous or aprotic solution, the surface sulfidization rapidly takes place, resulting in the formation of Cu2S nanoflake arrays with tunable texture. When the sulfidized Cu current collector is directly used as the sulfur–equivalent cathode, it enables high–performance Li/Na–S batteries at room temperature with reasonable high sulfur loading. Specific capacities up to ≈1200 mAh g–1 for Li–S and ≈400 mAh g–1 for Na–S are measured when normalized to the amount of equivalent sulfur, and can be readily sustained for >1000 cycles.},
doi = {10.1002/aenm.201800624},
journal = {Advanced Energy Materials},
number = 22,
volume = 8,
place = {United States},
year = {2018},
month = {5}
}

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