In situ X-ray diffraction studies of (de)lithiation mechanism in silicon nanowire anodes

ACS Nano
Sumohan MisraMichael F Toney

Abstract

Silicon is a promising anode material for Li-ion batteries due to its high theoretical specific capacity. From previous work, silicon nanowires (SiNWs) are known to undergo amorphorization during lithiation, and no crystalline Li-Si product has been observed. In this work, we use an X-ray transparent battery cell to perform in situ synchrotron X-ray diffraction on SiNWs in real time during electrochemical cycling. At deep lithiation voltages the known metastable Li(15)Si(4) phase forms, and we show that avoiding the formation of this phase, by modifying the SiNW growth temperature, improves the cycling performance of SiNW anodes. Our results provide insight on the (de)lithiation mechanism and a correlation between phase evolution and electrochemical performance for SiNW anodes.

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Citations

Jan 18, 2013·Nano Letters·Matthew T McDowellYi Cui
Sep 6, 2012·Proceedings of the National Academy of Sciences of the United States of America·Alexandru VladPulickel M Ajayan
Oct 8, 2014·Chemical Reviews·Liqiang MaiLin Xu
Nov 25, 2014·Nano Letters·Jesper WallentinTim Salditt
Apr 5, 2014·Advanced Materials·Brian L EllisThierry Djenizian
Jul 22, 2016·Chemical Society Reviews·Junghoon YangYong-Mook Kang
Jan 23, 2014·ACS Nano·Lamuel DavidGurpreet Singh
Nov 2, 2016·Nano Letters·Chuntian CaoMichael F Toney
Jul 20, 2016·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Faxing WangYuping Wu
Mar 3, 2020·The Journal of Chemical Physics·Hans-Georg SteinrückMichael F Toney
Mar 4, 2021·Nanoscale·Lijing HanMingdeng Wei
Aug 8, 2021·ACS Applied Materials & Interfaces·Jasper C WoodardJillian M Buriak
Oct 1, 2019·Chemical Reviews·Guangmin ZhouYi Cui

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