Kinetics of reaction products of silicon monoxide with controlled amount of li-ion insertion at various current densities for li-ion batteries

Jun Kyu Lee, Wooyoung Yoon, Bok Ki Kim

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

To understand the kinetics of the reaction products (Li-Si alloys, Li 2O and Li4 SiO4) in SiOx anodes for Li-ion batteries, the irreversible behavior of the batteries is studied while controlling the amount of Li-ion insertion at various current densities. SiOx is charged when the amount of Li inserted into SiOx is varied (0.1, 0.2, 0.5, and 4 mol per 1 mol of SiOx, also called "mole control") and is discharged to 1.5 V at various Crates. The irreversible capacity of SiOx increases at high mole rate, but decreases at high Crates. To observe the formation of the reaction products after mole control at various current densities, impedance and X-ray photoelectron spectroscopy are used. Also, the relative quantity of irreversible products (Li4SiO4) after mole control at various current densities is detected by Fast Fourier transform (FFT). Upon evaluating the dQ/dV curves, it was determined that the elevated rate of the overpotential of the irreversible products (Li2O, Li4SiO4) was higher than that of the reversible products (Li-Si alloys) as the current density increased. The use of the Butler-Volmer equation shows that the activation energy of the reaction products is affected by the current density, which changes the irreversible capacity of SiOx during cycling.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume161
Issue number6
DOIs
Publication statusPublished - 2014 Jan 1

Fingerprint

Reaction products
reaction products
electric batteries
insertion
Current density
Ions
current density
Silicon
Kinetics
kinetics
silicon
ions
products
Fast Fourier transforms
Anodes
anodes
X ray photoelectron spectroscopy
Activation energy
Lithium-ion batteries
silicon monoxide

ASJC Scopus subject areas

  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

Cite this

@article{0e8aa3fae71445f5a578bb1baf57bc84,
title = "Kinetics of reaction products of silicon monoxide with controlled amount of li-ion insertion at various current densities for li-ion batteries",
abstract = "To understand the kinetics of the reaction products (Li-Si alloys, Li 2O and Li4 SiO4) in SiOx anodes for Li-ion batteries, the irreversible behavior of the batteries is studied while controlling the amount of Li-ion insertion at various current densities. SiOx is charged when the amount of Li inserted into SiOx is varied (0.1, 0.2, 0.5, and 4 mol per 1 mol of SiOx, also called {"}mole control{"}) and is discharged to 1.5 V at various Crates. The irreversible capacity of SiOx increases at high mole rate, but decreases at high Crates. To observe the formation of the reaction products after mole control at various current densities, impedance and X-ray photoelectron spectroscopy are used. Also, the relative quantity of irreversible products (Li4SiO4) after mole control at various current densities is detected by Fast Fourier transform (FFT). Upon evaluating the dQ/dV curves, it was determined that the elevated rate of the overpotential of the irreversible products (Li2O, Li4SiO4) was higher than that of the reversible products (Li-Si alloys) as the current density increased. The use of the Butler-Volmer equation shows that the activation energy of the reaction products is affected by the current density, which changes the irreversible capacity of SiOx during cycling.",
author = "Lee, {Jun Kyu} and Wooyoung Yoon and Kim, {Bok Ki}",
year = "2014",
month = "1",
day = "1",
doi = "10.1149/2.040406jes",
language = "English",
volume = "161",
journal = "Journal of the Electrochemical Society",
issn = "0013-4651",
publisher = "Electrochemical Society, Inc.",
number = "6",

}

TY - JOUR

T1 - Kinetics of reaction products of silicon monoxide with controlled amount of li-ion insertion at various current densities for li-ion batteries

AU - Lee, Jun Kyu

AU - Yoon, Wooyoung

AU - Kim, Bok Ki

PY - 2014/1/1

Y1 - 2014/1/1

N2 - To understand the kinetics of the reaction products (Li-Si alloys, Li 2O and Li4 SiO4) in SiOx anodes for Li-ion batteries, the irreversible behavior of the batteries is studied while controlling the amount of Li-ion insertion at various current densities. SiOx is charged when the amount of Li inserted into SiOx is varied (0.1, 0.2, 0.5, and 4 mol per 1 mol of SiOx, also called "mole control") and is discharged to 1.5 V at various Crates. The irreversible capacity of SiOx increases at high mole rate, but decreases at high Crates. To observe the formation of the reaction products after mole control at various current densities, impedance and X-ray photoelectron spectroscopy are used. Also, the relative quantity of irreversible products (Li4SiO4) after mole control at various current densities is detected by Fast Fourier transform (FFT). Upon evaluating the dQ/dV curves, it was determined that the elevated rate of the overpotential of the irreversible products (Li2O, Li4SiO4) was higher than that of the reversible products (Li-Si alloys) as the current density increased. The use of the Butler-Volmer equation shows that the activation energy of the reaction products is affected by the current density, which changes the irreversible capacity of SiOx during cycling.

AB - To understand the kinetics of the reaction products (Li-Si alloys, Li 2O and Li4 SiO4) in SiOx anodes for Li-ion batteries, the irreversible behavior of the batteries is studied while controlling the amount of Li-ion insertion at various current densities. SiOx is charged when the amount of Li inserted into SiOx is varied (0.1, 0.2, 0.5, and 4 mol per 1 mol of SiOx, also called "mole control") and is discharged to 1.5 V at various Crates. The irreversible capacity of SiOx increases at high mole rate, but decreases at high Crates. To observe the formation of the reaction products after mole control at various current densities, impedance and X-ray photoelectron spectroscopy are used. Also, the relative quantity of irreversible products (Li4SiO4) after mole control at various current densities is detected by Fast Fourier transform (FFT). Upon evaluating the dQ/dV curves, it was determined that the elevated rate of the overpotential of the irreversible products (Li2O, Li4SiO4) was higher than that of the reversible products (Li-Si alloys) as the current density increased. The use of the Butler-Volmer equation shows that the activation energy of the reaction products is affected by the current density, which changes the irreversible capacity of SiOx during cycling.

UR - http://www.scopus.com/inward/record.url?scp=84904809064&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84904809064&partnerID=8YFLogxK

U2 - 10.1149/2.040406jes

DO - 10.1149/2.040406jes

M3 - Article

VL - 161

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

SN - 0013-4651

IS - 6

ER -