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Title: Electrochemical lithiation of silicon with varied crystallographic orientation

Abstract

The anisotropy of lithium intercalation into the silicon anodes of Li-ion batteries is studied on microstructures having the form of a grid with 0.5-μm-thick vertical walls and on silicon wafers of varied orientation. Electrochemical lithiation is performed at room temperature in the galvanostatic mode. The charging curves of the microstructure and flat Si anodes are examined. Secondary-ion mass spectroscopy is used to determine the distribution of intercalated Li atoms across the wafer thickness. The experimental data are analyzed in terms of the two-phase model in which the lithiation process is limited by the propagation velocity of the front between the amorphous alloy with a high Li content and the crystalline Si substrate. The relationship between the rates of Li intercalation into different crystallographic planes: (110), (111), and (100), is found to be V{sub 110}: V{sub 111}: V{sub 100} = 3.1: 1.1: 1.0. It is demonstrated that microstructure anodes with (110) walls have the highest cycle life and withstand ~600 cycles when charged and discharged at a rate of 0.36 C.

Authors:
; ; ; ; ; ;  [1]
  1. Russian Academy of Sciences, Ioffe Physical–Technical Institute (Russian Federation)
Publication Date:
OSTI Identifier:
22649736
Resource Type:
Journal Article
Resource Relation:
Journal Name: Semiconductors; Journal Volume: 50; Journal Issue: 7; Other Information: Copyright (c) 2016 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ALLOYS; ANISOTROPY; ANODES; ELECTROCHEMISTRY; ION MICROPROBE ANALYSIS; LITHIUM; LITHIUM ION BATTERIES; MASS SPECTROSCOPY; MICROSTRUCTURE; SILICON; SUBSTRATES; TEMPERATURE RANGE 0273-0400 K

Citation Formats

Astrova, E. V., E-mail: east@mail.ioffe.ru, Rumyantsev, A. M., Li, G. V., Nashchekin, A. V., Kazantsev, D. Yu., Ber, B. Ya., and Zhdanov, V. V. Electrochemical lithiation of silicon with varied crystallographic orientation. United States: N. p., 2016. Web. doi:10.1134/S1063782616070022.
Astrova, E. V., E-mail: east@mail.ioffe.ru, Rumyantsev, A. M., Li, G. V., Nashchekin, A. V., Kazantsev, D. Yu., Ber, B. Ya., & Zhdanov, V. V. Electrochemical lithiation of silicon with varied crystallographic orientation. United States. doi:10.1134/S1063782616070022.
Astrova, E. V., E-mail: east@mail.ioffe.ru, Rumyantsev, A. M., Li, G. V., Nashchekin, A. V., Kazantsev, D. Yu., Ber, B. Ya., and Zhdanov, V. V. 2016. "Electrochemical lithiation of silicon with varied crystallographic orientation". United States. doi:10.1134/S1063782616070022.
@article{osti_22649736,
title = {Electrochemical lithiation of silicon with varied crystallographic orientation},
author = {Astrova, E. V., E-mail: east@mail.ioffe.ru and Rumyantsev, A. M. and Li, G. V. and Nashchekin, A. V. and Kazantsev, D. Yu. and Ber, B. Ya. and Zhdanov, V. V.},
abstractNote = {The anisotropy of lithium intercalation into the silicon anodes of Li-ion batteries is studied on microstructures having the form of a grid with 0.5-μm-thick vertical walls and on silicon wafers of varied orientation. Electrochemical lithiation is performed at room temperature in the galvanostatic mode. The charging curves of the microstructure and flat Si anodes are examined. Secondary-ion mass spectroscopy is used to determine the distribution of intercalated Li atoms across the wafer thickness. The experimental data are analyzed in terms of the two-phase model in which the lithiation process is limited by the propagation velocity of the front between the amorphous alloy with a high Li content and the crystalline Si substrate. The relationship between the rates of Li intercalation into different crystallographic planes: (110), (111), and (100), is found to be V{sub 110}: V{sub 111}: V{sub 100} = 3.1: 1.1: 1.0. It is demonstrated that microstructure anodes with (110) walls have the highest cycle life and withstand ~600 cycles when charged and discharged at a rate of 0.36 C.},
doi = {10.1134/S1063782616070022},
journal = {Semiconductors},
number = 7,
volume = 50,
place = {United States},
year = 2016,
month = 7
}
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