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Title: Tuning the Activity of Oxygen in LiNi0.8Co0.15Al0.05O2 Battery Electrodes

Abstract

Layered transition metal oxides such as LiNi0.8Co0.15Al0.05O2 (NCA) are highly desirable battery electrodes. However, these materials suffer from thermal runaway caused by deleterious oxygen loss and surface phase transitions at highly overcharged and overheated conditions, prompting serious safety concerns. Using in situ environmental transmission electron microscopy techniques, we demonstrate surface oxygen loss and structural changes in the highly overcharged NCA particles are suppressed by exposing them to an oxygen-rich environment. The onset temperature for the loss of oxygen from the electrode particle is delayed to 350 °C at oxygen gas overpressure of 400 mTorr. Similar heating of the particles in a reducing hydrogen gas demonstrated a quick onset of oxygen loss at 150 °C and rapid surface degradation of the particles. Lastly, the results reported here illustrate the fundamental materials science governing the failure processes of electrode particles and highlight possible strategies to circumvent such issues.

Authors:
 [1];  [2];  [3];  [3];  [2];  [2];  [3]
  1. Binghamton Univ., NY (United States). NorthEast Center for Chemical Energy Storage (NECCES); Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
  2. Binghamton Univ., NY (United States). NorthEast Center for Chemical Energy Storage (NECCES)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Northeastern Center for Chemical Energy Storage (NECCES)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1436255
Report Number(s):
BNL-203604-2018-JAAM
Journal ID: ISSN 1944-8244
Grant/Contract Number:  
SC0012704; SC0012583; SC0001294
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 8; Journal Issue: 41; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; hemical potential; lithium-ion battery; oxidation reduction; transition metal oxides; transmission electron microscopy

Citation Formats

Karki, Khim, Huang, Yiqing, Hwang, Sooyeon, Gamalski, Andrew D., Whittingham, M. Stanley, Zhou, Guangwen, and Stach, Eric A. Tuning the Activity of Oxygen in LiNi0.8Co0.15Al0.05O2 Battery Electrodes. United States: N. p., 2016. Web. https://doi.org/10.1021/acsami.6b09585.
Karki, Khim, Huang, Yiqing, Hwang, Sooyeon, Gamalski, Andrew D., Whittingham, M. Stanley, Zhou, Guangwen, & Stach, Eric A. Tuning the Activity of Oxygen in LiNi0.8Co0.15Al0.05O2 Battery Electrodes. United States. https://doi.org/10.1021/acsami.6b09585
Karki, Khim, Huang, Yiqing, Hwang, Sooyeon, Gamalski, Andrew D., Whittingham, M. Stanley, Zhou, Guangwen, and Stach, Eric A. Mon . "Tuning the Activity of Oxygen in LiNi0.8Co0.15Al0.05O2 Battery Electrodes". United States. https://doi.org/10.1021/acsami.6b09585. https://www.osti.gov/servlets/purl/1436255.
@article{osti_1436255,
title = {Tuning the Activity of Oxygen in LiNi0.8Co0.15Al0.05O2 Battery Electrodes},
author = {Karki, Khim and Huang, Yiqing and Hwang, Sooyeon and Gamalski, Andrew D. and Whittingham, M. Stanley and Zhou, Guangwen and Stach, Eric A.},
abstractNote = {Layered transition metal oxides such as LiNi0.8Co0.15Al0.05O2 (NCA) are highly desirable battery electrodes. However, these materials suffer from thermal runaway caused by deleterious oxygen loss and surface phase transitions at highly overcharged and overheated conditions, prompting serious safety concerns. Using in situ environmental transmission electron microscopy techniques, we demonstrate surface oxygen loss and structural changes in the highly overcharged NCA particles are suppressed by exposing them to an oxygen-rich environment. The onset temperature for the loss of oxygen from the electrode particle is delayed to 350 °C at oxygen gas overpressure of 400 mTorr. Similar heating of the particles in a reducing hydrogen gas demonstrated a quick onset of oxygen loss at 150 °C and rapid surface degradation of the particles. Lastly, the results reported here illustrate the fundamental materials science governing the failure processes of electrode particles and highlight possible strategies to circumvent such issues.},
doi = {10.1021/acsami.6b09585},
journal = {ACS Applied Materials and Interfaces},
number = 41,
volume = 8,
place = {United States},
year = {2016},
month = {9}
}

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