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Title: Exploring the charge reactions in a Li–O 2 system with lithium oxide cathodes and nonaqueous electrolytes

Abstract

Nonaqueous lithium–oxygen batteries have attracted considerable attention due to their high energy density. Huge efforts have been made to unravel the fundamentals of Li–O 2 battery chemistry. However, current Li–O 2 batteries still suffer from several unresolved problems such as the instability of electrolytes and sluggish oxidation of lithium oxides during the charging process. In this paper, we propose a detailed study to investigate the charge mechanism of lithium oxide materials in different electrolytes. Commercially available lithium peroxide and lithium oxide have been employed as cathodes to determine how lithium oxides (both lithium oxide and lithium peroxide) and electrolytes change during charge. Lastly, the result shows that Li 2O 2 decomposed to lithium and oxygen; meanwhile, the electrolyte has a significant influence on Li 2O 2 decomposition. Furthermore, while most of the Li 2O material participates in side reactions with the electrolyte, some of it is found to delithiate and crumble in structure.

Authors:
 [1];  [2];  [3];  [3];  [3];  [2]; ORCiD logo [4]; ORCiD logo [3]; ORCiD logo [3]
  1. Nanjing Tech Univ. (China); Univ. of Illinois, Chicago, IL (United States)
  2. Univ. of Illinois, Chicago, IL (United States)
  3. Argonne National Lab. (ANL), Lemont, IL (United States)
  4. Nanjing Tech Univ. (China)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); National Natural Science Foundation of China (NNSFC); China Scholarship Council; National Key Research and Development Program of China
OSTI Identifier:
1560038
Alternate Identifier(s):
OSTI ID: 1527201
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Materials Chemistry. A
Additional Journal Information:
Journal Volume: 7; Journal Issue: 26; Journal ID: ISSN 2050-7488
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE

Citation Formats

Zhang, Tao, Amine, Rachid, Bi, Xuanxuan, Qin, Yan, Li, Matthew, Al-Hallaj, Said, Huo, Fengwei, Lu, Jun, and Amine, Khalil. Exploring the charge reactions in a Li–O2 system with lithium oxide cathodes and nonaqueous electrolytes. United States: N. p., 2019. Web. doi:10.1039/c9ta03763b.
Zhang, Tao, Amine, Rachid, Bi, Xuanxuan, Qin, Yan, Li, Matthew, Al-Hallaj, Said, Huo, Fengwei, Lu, Jun, & Amine, Khalil. Exploring the charge reactions in a Li–O2 system with lithium oxide cathodes and nonaqueous electrolytes. United States. https://doi.org/10.1039/c9ta03763b
Zhang, Tao, Amine, Rachid, Bi, Xuanxuan, Qin, Yan, Li, Matthew, Al-Hallaj, Said, Huo, Fengwei, Lu, Jun, and Amine, Khalil. Wed . "Exploring the charge reactions in a Li–O2 system with lithium oxide cathodes and nonaqueous electrolytes". United States. https://doi.org/10.1039/c9ta03763b. https://www.osti.gov/servlets/purl/1560038.
@article{osti_1560038,
title = {Exploring the charge reactions in a Li–O2 system with lithium oxide cathodes and nonaqueous electrolytes},
author = {Zhang, Tao and Amine, Rachid and Bi, Xuanxuan and Qin, Yan and Li, Matthew and Al-Hallaj, Said and Huo, Fengwei and Lu, Jun and Amine, Khalil},
abstractNote = {Nonaqueous lithium–oxygen batteries have attracted considerable attention due to their high energy density. Huge efforts have been made to unravel the fundamentals of Li–O2 battery chemistry. However, current Li–O2 batteries still suffer from several unresolved problems such as the instability of electrolytes and sluggish oxidation of lithium oxides during the charging process. In this paper, we propose a detailed study to investigate the charge mechanism of lithium oxide materials in different electrolytes. Commercially available lithium peroxide and lithium oxide have been employed as cathodes to determine how lithium oxides (both lithium oxide and lithium peroxide) and electrolytes change during charge. Lastly, the result shows that Li2O2 decomposed to lithium and oxygen; meanwhile, the electrolyte has a significant influence on Li2O2 decomposition. Furthermore, while most of the Li2O material participates in side reactions with the electrolyte, some of it is found to delithiate and crumble in structure.},
doi = {10.1039/c9ta03763b},
url = {https://www.osti.gov/biblio/1560038}, journal = {Journal of Materials Chemistry. A},
issn = {2050-7488},
number = 26,
volume = 7,
place = {United States},
year = {2019},
month = {6}
}

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