Irreversible behaviors and kinetics of lithiated products in SiO x anodes with inserting Li contents in Li ion batteries

Jun Kyu Lee, Bok Ki Kim, Wooyoung Yoon

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The irreversible behavior of SiOx anodes during cycling has been investigated by controlling the amount of Li inserted during lithiation. This study mainly focuses on evaluating the amount of irreversible capacity by varying the amount of Li inserted into the SiOx (0.1, 0.5, 1, 2, and 4 mol Li per mol of SiOx , the so called "mol rate") and investigating the lithiated products using X-ray photoelectron spectroscopy (XPS) after various numbers of cycles were performed at a 0.1 mol rate. It is notified that the irreversible capacity of the SiOx anode increases with increasing lithiation mol rates, meaning that the reaction products (Li2O, Li15Si4, and Li-Si-O products) have different reaction kinetics during lithiation. In particular, the XPS investigations showed that the first reaction product is Li2O, the second reaction product is Li-Si alloy (Li15Si4), and the final reaction product is the Li-Si-O products.

Original languageEnglish
Article number10MB10
JournalJapanese Journal of Applied Physics
Volume52
Issue number10 PART2
DOIs
Publication statusPublished - 2013 Nov 11

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Reaction products
reaction products
electric batteries
Anodes
anodes
Kinetics
kinetics
products
ions
X ray photoelectron spectroscopy
photoelectron spectroscopy
cycles
Reaction kinetics
reaction kinetics
x rays
Lithium-ion batteries

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Irreversible behaviors and kinetics of lithiated products in SiO x anodes with inserting Li contents in Li ion batteries. / Lee, Jun Kyu; Kim, Bok Ki; Yoon, Wooyoung.

In: Japanese Journal of Applied Physics, Vol. 52, No. 10 PART2, 10MB10, 11.11.2013.

Research output: Contribution to journalArticle

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