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On the in situ study of Li ion transport in transmission electron microscope

Published online by Cambridge University Press:  26 November 2014

Nan Jiang*
Affiliation:
Department of Physics, Arizona State University, Tempe, Arizona 85297, USA
*
a)Address all correspondence to this author. e-mail: nan.jiang@asu.edu
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Abstract

For understanding the atomic processes involved, in situ observation at near-atomic spatial resolution is needed in the studies of lithium ion battery materials. We show that the Li transport and the lithiation of carbon atoms may be triggered by the electron beam in an electron microscope, together with simultaneous real-time monitoring of electron energy-loss spectroscopy to reveal the chemical state of the species. The local electric field induced in an electrolyte particle by an electron beam acts on Li ions, resulting in Li transport and reaction with carbons. This process closely mimics the charging process of an electrochemical battery charge cycle, without an external power supply. We find that the lithium transport occurs in the form of Li+.

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Articles
Copyright
Copyright © Materials Research Society 2014 

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