A study at room temperature and 55°C on the charge-discharge characteristics of Si(100-x)Alx thin film anode for Li-ion batteries

Yueh Ting Shih, Chao Han Wu, Fei-Yi Hung, Truan-Sheng Lui, Li Hui Chen

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

In this study, Al was added into Si matrix as the buffer (Si90Al10, Si75Al25 and Si55Al45) by co-sputtering to prevent the dramatic volumetric expansion of a pure Si thin film anode during lithiation and delithiation. The electrochemical properties and structural characteristics of Si(100-x)Alx (at.%) films at room temperature and 55°C were investigated. At 55°C, the higher lithiation and delithiation quantity was accompanied by a dramatic volumetric expansion which increased the capacity but degraded the stability. In addition, the resistance against electrochemical reactions was controlled by the diffusion rate of lithium ions at 55°C. After charge-discharge, the Si-Al thin film had undergone recrystallization and had been affecting the 55°C charge-discharge characteristics of the thin film anodes.

Original languageEnglish
Pages (from-to)79-84
Number of pages6
JournalSurface and Coatings Technology
Volume215
DOIs
Publication statusPublished - 2013 Jan 25

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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