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Title: Super Charge Separation and High Voltage Phase in Na xMnO 2

Abstract

Na xMnO 2 shows Mn 3+ and Mn 4+ charge separation with the charge stripe ordering upon Na deintercalation at x = 5/8. In this paper it is shown that, surprisingly, at lower Na compositions of 5/8 > x ≥ 1/18 the phase evolution pathway of Na xMnO 2 upon Na deintercalation shows a unique phenomenon of super charge separation, where the Mn 3+ and Mn 4+ ions fully charge-separate into charge superplanes formed by succession of charge stripes in the third dimension. Furthermore, the Mn 3+ superplanes attract Na ions electronically, and dominate the antiferromagnetic interactions in NaMnO 2. Na ions in Mn 3+ superplanes also naturally pillar the MnO 2 layers to form the unusual O1 phases with large interlayer distances at x < 1/3, which dominates the unique electrochemical behavior of NaMnO 2.

Authors:
 [1];  [1];  [2];  [3];  [2];  [2];  [3];  [4];  [1]
  1. Harvard Univ., Cambridge, MA (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. North Carolina State Univ., Raleigh, NC (United States)
  4. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
Harvard University; USDOE
OSTI Identifier:
1524584
Alternate Identifier(s):
OSTI ID: 1479523
Grant/Contract Number:  
AC02-06CH11357; AC02‐06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Functional Materials (Online)
Additional Journal Information:
Journal Name: Advanced Functional Materials (Online); Journal Volume: 28; Journal Issue: 50; Journal ID: ISSN 1616-3028
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
Na ion batteries; magnetic properties of sodium manganese oxides; novel high-voltage phases; reversible asymmetric structural evolutions; super charge-separations

Citation Formats

Chen, Xi, Wang, Yichao, Wiaderek, Kamila, Sang, Xiahan, Borkiewicz, Olaf, Chapman, Karena, LeBeau, James, Lynn, Jeffrey, and Li, Xin. Super Charge Separation and High Voltage Phase in NaxMnO2. United States: N. p., 2018. Web. doi:10.1002/adfm.201805105.
Chen, Xi, Wang, Yichao, Wiaderek, Kamila, Sang, Xiahan, Borkiewicz, Olaf, Chapman, Karena, LeBeau, James, Lynn, Jeffrey, & Li, Xin. Super Charge Separation and High Voltage Phase in NaxMnO2. United States. doi:10.1002/adfm.201805105.
Chen, Xi, Wang, Yichao, Wiaderek, Kamila, Sang, Xiahan, Borkiewicz, Olaf, Chapman, Karena, LeBeau, James, Lynn, Jeffrey, and Li, Xin. Sun . "Super Charge Separation and High Voltage Phase in NaxMnO2". United States. doi:10.1002/adfm.201805105.
@article{osti_1524584,
title = {Super Charge Separation and High Voltage Phase in NaxMnO2},
author = {Chen, Xi and Wang, Yichao and Wiaderek, Kamila and Sang, Xiahan and Borkiewicz, Olaf and Chapman, Karena and LeBeau, James and Lynn, Jeffrey and Li, Xin},
abstractNote = {NaxMnO2 shows Mn3+ and Mn4+ charge separation with the charge stripe ordering upon Na deintercalation at x = 5/8. In this paper it is shown that, surprisingly, at lower Na compositions of 5/8 > x ≥ 1/18 the phase evolution pathway of NaxMnO2 upon Na deintercalation shows a unique phenomenon of super charge separation, where the Mn3+ and Mn4+ ions fully charge-separate into charge superplanes formed by succession of charge stripes in the third dimension. Furthermore, the Mn3+ superplanes attract Na ions electronically, and dominate the antiferromagnetic interactions in NaMnO2. Na ions in Mn3+ superplanes also naturally pillar the MnO2 layers to form the unusual O1 phases with large interlayer distances at x < 1/3, which dominates the unique electrochemical behavior of NaMnO2.},
doi = {10.1002/adfm.201805105},
journal = {Advanced Functional Materials (Online)},
number = 50,
volume = 28,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
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This content will become publicly available on October 21, 2019
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Works referenced in this record:

CoO2, The End Member of the LixCoO2 Solid Solution
journal, January 1996

  • Amatucci, G. G.; Tarascon, J. M.; Klein, L. C.
  • Journal of The Electrochemical Society, Vol. 143, Issue 3, p. 1114-1123
  • DOI: 10.1149/1.1836594