Temperature dependent local structure of LiCoO2 nanoparticles determined by Co K-edge X-ray absorption fine structure

L. Maugeri; L. Simonelli; A. Iadecola; B. Joseph; M. Okubo; I. Honma; H. Wadati; T. Mizokawa; N. L. Saini

doi:10.1016/j.jpowsour.2012.11.127

Temperature dependent local structure of LiCoO₂ nanoparticles determined by Co K-edge X-ray absorption fine structure

L. Maugeri, L. Simonelli, A. Iadecola, B. Joseph, M. Okubo, I. Honma, H. Wadati, T. Mizokawa, N. L. Saini^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

Temperature dependent Co K-edge extended X-ray absorption fine structure is used to investigate local disorder in LiCoO₂ nanoparticles. We find that the nanostructuring has direct influence on the bondlength characteristics. The results reveal a substantial decrease in the force constant of Co-O bonds (the Co-O bonds becoming more flexible), while that for the Co-Co bonds showing hardly any change (or increases slightly) in LiCoO₂ nanoparticles with respect to the bulk. Therefore, both random disorder and Co-O bondlength flexibility should be the factors to limit the battery characteristics of the LiCoO₂ nanoparticles.

Original language	English
Pages (from-to)	272-276
Number of pages	5
Journal	Journal of Power Sources
Volume	229
DOIs	https://doi.org/10.1016/j.jpowsour.2012.11.127
Publication status	Published - 2013
Externally published	Yes

Keywords

LiCoO nanoparticles
Lithium-ion batteries
Local disorder
X-ray absorption spectroscopy

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

Access to Document

10.1016/j.jpowsour.2012.11.127

Cite this

@article{4c8e7b96d0e24c1fa65260f9bcedcc95,

title = "Temperature dependent local structure of LiCoO2 nanoparticles determined by Co K-edge X-ray absorption fine structure",

abstract = "Temperature dependent Co K-edge extended X-ray absorption fine structure is used to investigate local disorder in LiCoO2 nanoparticles. We find that the nanostructuring has direct influence on the bondlength characteristics. The results reveal a substantial decrease in the force constant of Co-O bonds (the Co-O bonds becoming more flexible), while that for the Co-Co bonds showing hardly any change (or increases slightly) in LiCoO2 nanoparticles with respect to the bulk. Therefore, both random disorder and Co-O bondlength flexibility should be the factors to limit the battery characteristics of the LiCoO2 nanoparticles.",

keywords = "LiCoO nanoparticles, Lithium-ion batteries, Local disorder, X-ray absorption spectroscopy",

author = "L. Maugeri and L. Simonelli and A. Iadecola and B. Joseph and M. Okubo and I. Honma and H. Wadati and T. Mizokawa and Saini, {N. L.}",

note = "Funding Information: The authors wishes to thank ESRF staff for the help and support during the experimental runs. This research is partially supported by the Japan Society for the Promotion of Science (JSPS) through the {\textquoteleft}FIRST Program{\textquoteright} initiated by the Council for Science and Technology Policy.",

year = "2013",

doi = "10.1016/j.jpowsour.2012.11.127",

language = "English",

volume = "229",

pages = "272--276",

journal = "Journal of Power Sources",

issn = "0378-7753",

publisher = "Elsevier",

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TY - JOUR

T1 - Temperature dependent local structure of LiCoO2 nanoparticles determined by Co K-edge X-ray absorption fine structure

AU - Maugeri, L.

AU - Simonelli, L.

AU - Iadecola, A.

AU - Joseph, B.

AU - Okubo, M.

AU - Honma, I.

AU - Wadati, H.

AU - Mizokawa, T.

AU - Saini, N. L.

N1 - Funding Information: The authors wishes to thank ESRF staff for the help and support during the experimental runs. This research is partially supported by the Japan Society for the Promotion of Science (JSPS) through the ‘FIRST Program’ initiated by the Council for Science and Technology Policy.

PY - 2013

Y1 - 2013

N2 - Temperature dependent Co K-edge extended X-ray absorption fine structure is used to investigate local disorder in LiCoO2 nanoparticles. We find that the nanostructuring has direct influence on the bondlength characteristics. The results reveal a substantial decrease in the force constant of Co-O bonds (the Co-O bonds becoming more flexible), while that for the Co-Co bonds showing hardly any change (or increases slightly) in LiCoO2 nanoparticles with respect to the bulk. Therefore, both random disorder and Co-O bondlength flexibility should be the factors to limit the battery characteristics of the LiCoO2 nanoparticles.

AB - Temperature dependent Co K-edge extended X-ray absorption fine structure is used to investigate local disorder in LiCoO2 nanoparticles. We find that the nanostructuring has direct influence on the bondlength characteristics. The results reveal a substantial decrease in the force constant of Co-O bonds (the Co-O bonds becoming more flexible), while that for the Co-Co bonds showing hardly any change (or increases slightly) in LiCoO2 nanoparticles with respect to the bulk. Therefore, both random disorder and Co-O bondlength flexibility should be the factors to limit the battery characteristics of the LiCoO2 nanoparticles.

KW - LiCoO nanoparticles

KW - Lithium-ion batteries

KW - Local disorder

KW - X-ray absorption spectroscopy

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DO - 10.1016/j.jpowsour.2012.11.127

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JO - Journal of Power Sources

JF - Journal of Power Sources

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