skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: New Insights into the Instability of Discharge Products in Na–O 2 Batteries

Abstract

Sodium–oxygen batteries currently stimulate extensive research due to their high theoretical energy density and improved operational stability when compared to lithium–oxygen batteries. Cell stability, however, needs to be demonstrated also under resting conditions before future implementation of these batteries. In this work we analyze the effect of resting periods on the stability of the sodium superoxide (NaO 2) discharge product. The instability of NaO 2 in the cell environment is demonstrated leading to the evolution of oxygen during the resting period and the decrease of the cell efficiency. In addition, migration of the superoxide anion (O2–) in the electrolyte is observed and demonstrated to be an important factor affecting Coulombic efficiency.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1340687
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: ACS Applied Materials and Interfaces; Journal Volume: 8; Journal Issue: 31
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; discharge stability; Na−O2 batteries

Citation Formats

Landa-Medrano, Imanol, Pinedo, Ricardo, Bi, Xuanxuan, Ruiz de Larramendi, Idoia, Lezama, Luis, Janek, Jürgen, Amine, Khalil, Lu, Jun, and Rojo, Teófilo. New Insights into the Instability of Discharge Products in Na–O 2 Batteries. United States: N. p., 2016. Web. doi:10.1021/acsami.6b06577.
Landa-Medrano, Imanol, Pinedo, Ricardo, Bi, Xuanxuan, Ruiz de Larramendi, Idoia, Lezama, Luis, Janek, Jürgen, Amine, Khalil, Lu, Jun, & Rojo, Teófilo. New Insights into the Instability of Discharge Products in Na–O 2 Batteries. United States. doi:10.1021/acsami.6b06577.
Landa-Medrano, Imanol, Pinedo, Ricardo, Bi, Xuanxuan, Ruiz de Larramendi, Idoia, Lezama, Luis, Janek, Jürgen, Amine, Khalil, Lu, Jun, and Rojo, Teófilo. 2016. "New Insights into the Instability of Discharge Products in Na–O 2 Batteries". United States. doi:10.1021/acsami.6b06577.
@article{osti_1340687,
title = {New Insights into the Instability of Discharge Products in Na–O 2 Batteries},
author = {Landa-Medrano, Imanol and Pinedo, Ricardo and Bi, Xuanxuan and Ruiz de Larramendi, Idoia and Lezama, Luis and Janek, Jürgen and Amine, Khalil and Lu, Jun and Rojo, Teófilo},
abstractNote = {Sodium–oxygen batteries currently stimulate extensive research due to their high theoretical energy density and improved operational stability when compared to lithium–oxygen batteries. Cell stability, however, needs to be demonstrated also under resting conditions before future implementation of these batteries. In this work we analyze the effect of resting periods on the stability of the sodium superoxide (NaO2) discharge product. The instability of NaO2 in the cell environment is demonstrated leading to the evolution of oxygen during the resting period and the decrease of the cell efficiency. In addition, migration of the superoxide anion (O2–) in the electrolyte is observed and demonstrated to be an important factor affecting Coulombic efficiency.},
doi = {10.1021/acsami.6b06577},
journal = {ACS Applied Materials and Interfaces},
number = 31,
volume = 8,
place = {United States},
year = 2016,
month = 8
}