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Title: Temperature Dependence of the Oxygen Reduction Mechanism in Nonaqueous Li–O 2 Batteries

Abstract

The temperature dependence of the oxygen reduction mechanism in Li-O 2 batteries was investigated using carbon nanotube-based air electrodes and 1,2-dimethoxyethane-based electrolyte within a temperature range of 20C to 40C. It is found that the discharge capacity of the Li-O 2 batteries decreases from 7,492 mAh g -1 at 40C to 2,930 mAh g -1 at 0C. However, a sharp increase in capacity was found when the temperature was further decreased and a very high capacity of 17,716 mAh g -1 was observed at 20C at a current density of 0.1 mA cm-2. When the temperature increases from 20C to 40C, the morphologies of the Li 2O 2 formed varied from ultra-small spherical particles to small flakes and then to large flake-stacked toroids. The lifetime of superoxide and the solution pathway play a dominate role on the battery capacity in the temperature range of -20C to 0C, but the electrochemical kinetics of oxygen reduction and the surface pathway dominate the discharge behavior in the temperature range of 0C to 40C. These findings provide fundamental understanding on the temperature dependence of oxygen reduction process in a Li-O 2 battery and will enable a more rational design of Li-O 2 batteries.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1];  [2];  [2];  [2];  [2];  [2];  [3];  [4];  [1];  [1]; ORCiD logo [5]; ORCiD logo [2]; ORCiD logo [1]
  1. Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
  2. Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
  3. Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States; Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, 689-798, South Korea
  4. Power and Energy Division, Sensor and Electron Devices Directorate, U.S. Army Research Laboratory, Adelphi, Maryland 20783, United States
  5. Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, 689-798, South Korea
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1406722
Report Number(s):
PNNL-SA-126517
Journal ID: ISSN 2380-8195; 48379; 49321; VT1201000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: ACS Energy Letters; Journal Volume: 2; Journal Issue: 11
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Environmental Molecular Sciences Laboratory

Citation Formats

Liu, Bin, Xu, Wu, Zheng, Jianming, Yan, Pengfei, Walter, Eric D., Isern, Nancy, Bowden, Mark E., Engelhard, Mark H., Kim, Sun Tai, Read, Jeffrey, Adams, Brian D., Li, Xiaolin, Cho, Jaephil, Wang, Chongmin, and Zhang, Ji-Guang. Temperature Dependence of the Oxygen Reduction Mechanism in Nonaqueous Li–O 2 Batteries. United States: N. p., 2017. Web. doi:10.1021/acsenergylett.7b00845.
Liu, Bin, Xu, Wu, Zheng, Jianming, Yan, Pengfei, Walter, Eric D., Isern, Nancy, Bowden, Mark E., Engelhard, Mark H., Kim, Sun Tai, Read, Jeffrey, Adams, Brian D., Li, Xiaolin, Cho, Jaephil, Wang, Chongmin, & Zhang, Ji-Guang. Temperature Dependence of the Oxygen Reduction Mechanism in Nonaqueous Li–O 2 Batteries. United States. doi:10.1021/acsenergylett.7b00845.
Liu, Bin, Xu, Wu, Zheng, Jianming, Yan, Pengfei, Walter, Eric D., Isern, Nancy, Bowden, Mark E., Engelhard, Mark H., Kim, Sun Tai, Read, Jeffrey, Adams, Brian D., Li, Xiaolin, Cho, Jaephil, Wang, Chongmin, and Zhang, Ji-Guang. Wed . "Temperature Dependence of the Oxygen Reduction Mechanism in Nonaqueous Li–O 2 Batteries". United States. doi:10.1021/acsenergylett.7b00845.
@article{osti_1406722,
title = {Temperature Dependence of the Oxygen Reduction Mechanism in Nonaqueous Li–O 2 Batteries},
author = {Liu, Bin and Xu, Wu and Zheng, Jianming and Yan, Pengfei and Walter, Eric D. and Isern, Nancy and Bowden, Mark E. and Engelhard, Mark H. and Kim, Sun Tai and Read, Jeffrey and Adams, Brian D. and Li, Xiaolin and Cho, Jaephil and Wang, Chongmin and Zhang, Ji-Guang},
abstractNote = {The temperature dependence of the oxygen reduction mechanism in Li-O2 batteries was investigated using carbon nanotube-based air electrodes and 1,2-dimethoxyethane-based electrolyte within a temperature range of 20C to 40C. It is found that the discharge capacity of the Li-O2 batteries decreases from 7,492 mAh g-1 at 40C to 2,930 mAh g-1 at 0C. However, a sharp increase in capacity was found when the temperature was further decreased and a very high capacity of 17,716 mAh g-1 was observed at 20C at a current density of 0.1 mA cm-2. When the temperature increases from 20C to 40C, the morphologies of the Li2O2 formed varied from ultra-small spherical particles to small flakes and then to large flake-stacked toroids. The lifetime of superoxide and the solution pathway play a dominate role on the battery capacity in the temperature range of -20C to 0C, but the electrochemical kinetics of oxygen reduction and the surface pathway dominate the discharge behavior in the temperature range of 0C to 40C. These findings provide fundamental understanding on the temperature dependence of oxygen reduction process in a Li-O2 battery and will enable a more rational design of Li-O2 batteries.},
doi = {10.1021/acsenergylett.7b00845},
journal = {ACS Energy Letters},
number = 11,
volume = 2,
place = {United States},
year = {Wed Oct 11 00:00:00 EDT 2017},
month = {Wed Oct 11 00:00:00 EDT 2017}
}