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Direct observation of the structural and electronic changes of Li2MnO3 during electron irradiation

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posted on 16.01.2017, 00:00 authored by P.J. Phillips, H. Iddir, D.P. Abraham, R.F. Klie
This study focuses on the effects of electron beam induced irradiation to the layered oxide Li2MnO3. Aberration-corrected scanning transmission electron microscopy and electron energy loss spectroscopy are used to characterize structural and electronic transitions in the material during irradiation, with a focus on changes in Mn valence and O content. This truly in situ irradiation allows for specific particle tracking, dose quantification, and real-time observation, while demonstrating many parallels to the oxide’s structure evolution observed during electrochemical cycling. Furthermore, it is demonstrated that typical imaging conditions are not severe enough to induce damage to the pristine oxide.

Funding

The authors acknowledge K.-B. Low and A. Nicholls of the UIC Research Resources Center, J. Bareno and R. Benedek at Argonne National Laboratory, and J.-C. Idrobo at Oak Ridge National Laboratory. Some of the computational work was conducted as part of the Applied Battery Research Program of the Office of Vehicle Technologies, U.S. Department of Energy, while computer time allocations at the Fusion Computer Facility, Argonne National Laboratory, and at EMSL Pacific Northwest National Laboratory are gratefully acknowledged. P.J.P. and R.F.K. acknowledge financial support from the Joint Center for Energy Storage Research (JCESR), an Energy Innovation Hub funded by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences. The UIC JEOL JEM-ARM 200CF is supported by an MRI-R2 grant from the National Science Foundation (Grant No. DMR-0959470)

History

Publisher Statement

This is a copy of an article published in the Applied Physics Letters © 2014 American Institute of Physics Publications. This article may be download for personal use only. Any other use require prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters 105, 113905 (2014); doi: 10.1063/1.4896264 and may be found at http://dx.doi.org/10.1063/1.4896264

Publisher

American Institute of Physics

issn

0003-6951

Issue date

01/01/2014

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