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Title: High rate and long cycle life in Li-O2 batteries with highly efficient catalytic cathode configured with Co3O4 nanoflower

Abstract

The reaction mechanism of non-aqueous Li-O2 batteries is based on the deposition and decomposition of Li2O2. The polarization of Li-O2 batteries can be rapidly increased by operation under a high rate condition, resulting in the early capacity fade of the cells. Therefore, a well-designed catalyst with a unique structure and excellent catalytic ability is an important way to boost the round-trip performance of Li-O2 batteries, especially under high current density. In this work, a unique nanoflower structure assembled with Co3O4 nanosheets is synthesized by using 2-methylimidazole (2-MIM) as a structural directing agent. X-ray photoelectron spectroscopy (XPS) and Raman spectra reveal abundant oxygen vacancies on the surface of the Co3O4 nanoflower, which are beneficial for oxygen reduction and evolution reactions and long round-trip lifetime. Density functional theory results demonstrate that Co3O4 catalyst with oxygen vacancies could promote the wetting of Li2O2 on substrate and formation of a Li2O2 nanofilm, thereby boosting the discharge capacity of Li-O2 batteries. On account of the synergistic effect of abundant oxygen vacancies, the unique structure, and excellent oxygen evolution reaction, Co3O4 nanoflower-based cells could deliver ultralong lifetime of 276 and 248 cycles with a discharge capacity of 1000 mAh g(-1) under charge/discharge current densities of 0.5more » A g-1 and 1 A g-1, respectively. Finally, this study has shed light on a new strategy for catalyst preparation for long lifetime Li-O2 batteries.« less

Authors:
 [1];  [2];  [3];  [4];  [1];  [1];  [1];  [5];  [5];  [3];  [3];  [3];  [5];  [6];  [1]
  1. China Univ. of Petroleum, Beijing (China). College of New Energy and Materials, Beijing Key Lab. of Biogas Upgrading Utilization, and State Key Lab. of Heavy Oil Processing
  2. Argonne National Lab. (ANL), Lemont, IL (United States). Chemical Science and Engineering Division
  3. Argonne National Lab. (ANL), Lemont, IL (United States). Materials Sciences Division
  4. Tehcnische Univ., Darmstadt (Germany). Eduard-Zintl-Institut für Anorganische und Physikalische Chemie
  5. Xiamen Univ., Fujian (China). State Key Lab. of PCOSS
  6. Argonne National Lab. (ANL), Lemont, IL (United States). Chemical Science and Engineering Division; Stanford Univ., CA (United States). Materials Science and Engineering
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Key Research and Development Program (China); USDOE Office of Energy Efficiency and Renewable Energy (EERE) - Office of Vehicle Technologies (VTO); USDOE
OSTI Identifier:
1574815
Alternate Identifier(s):
OSTI ID: 1703058
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nano Energy
Additional Journal Information:
Journal Volume: 64; Journal Issue: C; Journal ID: ISSN 2211-2855
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Co3O4 nanoflower; Li-O-2 batteries; long cycle life; oxygen vacancies

Citation Formats

Jiang, Zhuo-Liang, Xu, Gui-Liang, Yu, Zhou, Zhou, Tian-Hang, Shi, Wen-Ke, Luo, Cong-Shan, Zhou, Hong-Jun, Chen, Li-Bin, Sheng, Wen-Jia, Zhou, Mingxia, Cheng, Lei, Assary, Rajeev S., Sun, Shi-Gang, Amine, Khalil, and Sun, Hui. High rate and long cycle life in Li-O2 batteries with highly efficient catalytic cathode configured with Co3O4 nanoflower. United States: N. p., 2019. Web. doi:10.1016/j.nanoen.2019.103896.
Jiang, Zhuo-Liang, Xu, Gui-Liang, Yu, Zhou, Zhou, Tian-Hang, Shi, Wen-Ke, Luo, Cong-Shan, Zhou, Hong-Jun, Chen, Li-Bin, Sheng, Wen-Jia, Zhou, Mingxia, Cheng, Lei, Assary, Rajeev S., Sun, Shi-Gang, Amine, Khalil, & Sun, Hui. High rate and long cycle life in Li-O2 batteries with highly efficient catalytic cathode configured with Co3O4 nanoflower. United States. https://doi.org/10.1016/j.nanoen.2019.103896
Jiang, Zhuo-Liang, Xu, Gui-Liang, Yu, Zhou, Zhou, Tian-Hang, Shi, Wen-Ke, Luo, Cong-Shan, Zhou, Hong-Jun, Chen, Li-Bin, Sheng, Wen-Jia, Zhou, Mingxia, Cheng, Lei, Assary, Rajeev S., Sun, Shi-Gang, Amine, Khalil, and Sun, Hui. 2019. "High rate and long cycle life in Li-O2 batteries with highly efficient catalytic cathode configured with Co3O4 nanoflower". United States. https://doi.org/10.1016/j.nanoen.2019.103896. https://www.osti.gov/servlets/purl/1574815.
@article{osti_1574815,
title = {High rate and long cycle life in Li-O2 batteries with highly efficient catalytic cathode configured with Co3O4 nanoflower},
author = {Jiang, Zhuo-Liang and Xu, Gui-Liang and Yu, Zhou and Zhou, Tian-Hang and Shi, Wen-Ke and Luo, Cong-Shan and Zhou, Hong-Jun and Chen, Li-Bin and Sheng, Wen-Jia and Zhou, Mingxia and Cheng, Lei and Assary, Rajeev S. and Sun, Shi-Gang and Amine, Khalil and Sun, Hui},
abstractNote = {The reaction mechanism of non-aqueous Li-O2 batteries is based on the deposition and decomposition of Li2O2. The polarization of Li-O2 batteries can be rapidly increased by operation under a high rate condition, resulting in the early capacity fade of the cells. Therefore, a well-designed catalyst with a unique structure and excellent catalytic ability is an important way to boost the round-trip performance of Li-O2 batteries, especially under high current density. In this work, a unique nanoflower structure assembled with Co3O4 nanosheets is synthesized by using 2-methylimidazole (2-MIM) as a structural directing agent. X-ray photoelectron spectroscopy (XPS) and Raman spectra reveal abundant oxygen vacancies on the surface of the Co3O4 nanoflower, which are beneficial for oxygen reduction and evolution reactions and long round-trip lifetime. Density functional theory results demonstrate that Co3O4 catalyst with oxygen vacancies could promote the wetting of Li2O2 on substrate and formation of a Li2O2 nanofilm, thereby boosting the discharge capacity of Li-O2 batteries. On account of the synergistic effect of abundant oxygen vacancies, the unique structure, and excellent oxygen evolution reaction, Co3O4 nanoflower-based cells could deliver ultralong lifetime of 276 and 248 cycles with a discharge capacity of 1000 mAh g(-1) under charge/discharge current densities of 0.5 A g-1 and 1 A g-1, respectively. Finally, this study has shed light on a new strategy for catalyst preparation for long lifetime Li-O2 batteries.},
doi = {10.1016/j.nanoen.2019.103896},
url = {https://www.osti.gov/biblio/1574815}, journal = {Nano Energy},
issn = {2211-2855},
number = C,
volume = 64,
place = {United States},
year = {Tue Oct 01 00:00:00 EDT 2019},
month = {Tue Oct 01 00:00:00 EDT 2019}
}

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