Improved cyclic performance of lithium-ion batteries: An investigation of cathode/electrolyte interface via in situ total-reflection fluorescence X-ray absorption spectroscopy

Kentaro Yamamoto, Taketoshi Minato, Shinichiro Mori, Daiko Takamatsu, Yuki Orikasa, Hajime Tanida, Koji Nakanishi, Haruno Murayama, Titus Masese, Takuya Mori, Hajime Arai, Yukinori Koyama, Zempachi Ogumi, Yoshiharu Uchimoto

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

For the further development of lithium-ion batteries, improvement of their cyclic performance is crucial. However, the mechanism underlying the deterioration of the battery cyclic performance is not fully understood. We investigated the effects of the electronic structure at the electrode/ electrolyte interface on the cyclic performance of the cathode materials via in situ total-reflection fluorescence X-ray absorption spectroscopy. In a LiCoO2 thin-film electrode that exhibits gradual deterioration upon subsequent Li ion extractions and insertions (cycling), the reduction of Co ions at the electrode/electrolyte interface was observed upon immersion in an organic electrolyte, with subsequent irreversible changes after cycling. In contrast, in a LiFePO4 thin-film electrode, the electronic structure at the electrode/electrolyte interface was stable and reversible upon electrolyte immersion with subsequent cycling. The increased stability of the electronic structure at the LiFePO4/electrolyte interface affects its cycling performance.

Original languageEnglish
Pages (from-to)9538-9543
Number of pages6
JournalJournal of Physical Chemistry C
Volume118
Issue number18
DOIs
Publication statusPublished - May 8 2014
Externally publishedYes

Fingerprint

X ray absorption spectroscopy
Electrolytes
electric batteries
absorption spectroscopy
Cathodes
lithium
cathodes
Fluorescence
electrolytes
fluorescence
Electrodes
electrodes
Electronic structure
ions
cycles
x rays
electronic structure
deterioration
submerging
Deterioration

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Improved cyclic performance of lithium-ion batteries : An investigation of cathode/electrolyte interface via in situ total-reflection fluorescence X-ray absorption spectroscopy. / Yamamoto, Kentaro; Minato, Taketoshi; Mori, Shinichiro; Takamatsu, Daiko; Orikasa, Yuki; Tanida, Hajime; Nakanishi, Koji; Murayama, Haruno; Masese, Titus; Mori, Takuya; Arai, Hajime; Koyama, Yukinori; Ogumi, Zempachi; Uchimoto, Yoshiharu.

In: Journal of Physical Chemistry C, Vol. 118, No. 18, 08.05.2014, p. 9538-9543.

Research output: Contribution to journalArticle

Yamamoto, K, Minato, T, Mori, S, Takamatsu, D, Orikasa, Y, Tanida, H, Nakanishi, K, Murayama, H, Masese, T, Mori, T, Arai, H, Koyama, Y, Ogumi, Z & Uchimoto, Y 2014, 'Improved cyclic performance of lithium-ion batteries: An investigation of cathode/electrolyte interface via in situ total-reflection fluorescence X-ray absorption spectroscopy', Journal of Physical Chemistry C, vol. 118, no. 18, pp. 9538-9543. https://doi.org/10.1021/jp5011132
Yamamoto, Kentaro ; Minato, Taketoshi ; Mori, Shinichiro ; Takamatsu, Daiko ; Orikasa, Yuki ; Tanida, Hajime ; Nakanishi, Koji ; Murayama, Haruno ; Masese, Titus ; Mori, Takuya ; Arai, Hajime ; Koyama, Yukinori ; Ogumi, Zempachi ; Uchimoto, Yoshiharu. / Improved cyclic performance of lithium-ion batteries : An investigation of cathode/electrolyte interface via in situ total-reflection fluorescence X-ray absorption spectroscopy. In: Journal of Physical Chemistry C. 2014 ; Vol. 118, No. 18. pp. 9538-9543.
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