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Title: Multiple-stripe lithiation mechanism of individual SnO2 nanowires in a flooding geometry

Abstract

The atomic scale lithiation mechanism of individual SnO2 nanowires in a flooding geometry with the entire wires being immersed in the electrolyte was revealed by in-situ transmission electron microscopy. The lithiation initiated multiple stripes with width of a few nanometer parallel to {020} planes transversing the entire wires, serving as multiple reaction fronts for late stage of lithiation. Inside the stripes, we identified high density of dislocations and enlarged inter-planar spacing, which provide effective path for lithium ion transport. The density of the stripes increased with further lithiation, and eventually they merged with one another, causing a large enlongation and volume expansion and the crystalline to amorphous phase transformation. This multiple stripes and multiple reaction fronts lithiation mechanism is unexpected and differs completely from the expected core-shell lithiation mechanism.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1030478
Report Number(s):
PNNL-SA-78260
Journal ID: ISSN 0031-9007; PRLTAO; KP1704020
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Physical Review Letters, 106(24):Article No. 248302
Additional Journal Information:
Journal Volume: 106; Journal Issue: 24; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
Multiple; stripe; lithiation; mechanism; individual; SnO2; nanowires; flooding; geometry

Citation Formats

Zhong, Li, Liu, Xiao H., Wang, G. F., Mao, Scott X., and Huang, Jian Yu. Multiple-stripe lithiation mechanism of individual SnO2 nanowires in a flooding geometry. United States: N. p., 2011. Web. doi:10.1103/PhysRevLett.106.248302.
Zhong, Li, Liu, Xiao H., Wang, G. F., Mao, Scott X., & Huang, Jian Yu. Multiple-stripe lithiation mechanism of individual SnO2 nanowires in a flooding geometry. United States. doi:10.1103/PhysRevLett.106.248302.
Zhong, Li, Liu, Xiao H., Wang, G. F., Mao, Scott X., and Huang, Jian Yu. Fri . "Multiple-stripe lithiation mechanism of individual SnO2 nanowires in a flooding geometry". United States. doi:10.1103/PhysRevLett.106.248302.
@article{osti_1030478,
title = {Multiple-stripe lithiation mechanism of individual SnO2 nanowires in a flooding geometry},
author = {Zhong, Li and Liu, Xiao H. and Wang, G. F. and Mao, Scott X. and Huang, Jian Yu},
abstractNote = {The atomic scale lithiation mechanism of individual SnO2 nanowires in a flooding geometry with the entire wires being immersed in the electrolyte was revealed by in-situ transmission electron microscopy. The lithiation initiated multiple stripes with width of a few nanometer parallel to {020} planes transversing the entire wires, serving as multiple reaction fronts for late stage of lithiation. Inside the stripes, we identified high density of dislocations and enlarged inter-planar spacing, which provide effective path for lithium ion transport. The density of the stripes increased with further lithiation, and eventually they merged with one another, causing a large enlongation and volume expansion and the crystalline to amorphous phase transformation. This multiple stripes and multiple reaction fronts lithiation mechanism is unexpected and differs completely from the expected core-shell lithiation mechanism.},
doi = {10.1103/PhysRevLett.106.248302},
journal = {Physical Review Letters, 106(24):Article No. 248302},
issn = {0031-9007},
number = 24,
volume = 106,
place = {United States},
year = {2011},
month = {6}
}

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