Evaluation of Li chemical potential of mechanically stressed LiCoO2

Yuta Kimura, Mahunnop Fakkao, Keita Funayama, Takashi Nakamura, Naoaki Kuwata, Tatsuya Kawada, Junichi Kawamura, Koji Amezawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

All-solid state Li ion batteries are expected as one of next-generation rechargeable batteries since they have the potential to achieve high energy density and are free of risk of a flammable liquid electrolyte. The Li ion batteries cathodes, such as LiCoO2, change their volume during insertion or extraction of Li ions. Therefore, mechanical stress can be induced at the electrode/electrolyte interface. This mechanical stress can affect the thermodynamic and/or kinetic properties of electrodes and electrolytes. In this study, we aimed to understand the influence of the mechanical stress on Li chemical potential of LiCoO2. The variation of Li chemical potential in LiCoO2 under mechanical stress was evaluated by electromotive force (emf) measurements. Positive emf was observed when the external mechanical stress was applied. This indicates that Li chemical potential in LiCoO2 was changed by the mechanical stress. The relationship between Li chemical potential and the mechanical stress was discussed from thermodynamic point of view.

Original languageEnglish
Title of host publication16th International Conference on Nanotechnology - IEEE NANO 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages830-831
Number of pages2
ISBN (Electronic)9781509039142
DOIs
Publication statusPublished - 2016 Nov 21
Event16th IEEE International Conference on Nanotechnology - IEEE NANO 2016 - Sendai, Japan
Duration: 2016 Aug 222016 Aug 25

Publication series

Name16th International Conference on Nanotechnology - IEEE NANO 2016

Other

Other16th IEEE International Conference on Nanotechnology - IEEE NANO 2016
Country/TerritoryJapan
CitySendai
Period16/8/2216/8/25

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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