Direct observation of a metastable crystal phase of LixFePO 4 under electrochemical phase transition

Yuki Orikasa; Takehiro Maeda; Yukinori Koyama; Haruno Murayama; Katsutoshi Fukuda; Hajime Tanida; Hajime Arai; Eiichiro Matsubara; Yoshiharu Uchimoto; Zempachi Ogumi

doi:10.1021/ja312527x

Direct observation of a metastable crystal phase of Li_xFePO ₄ under electrochemical phase transition

Yuki Orikasa, Takehiro Maeda, Yukinori Koyama, Haruno Murayama, Katsutoshi Fukuda, Hajime Tanida, Hajime Arai, Eiichiro Matsubara, Yoshiharu Uchimoto, Zempachi Ogumi

Research output: Contribution to journal › Article

131 Citations (Scopus)

Abstract

The phase transition between LiFePO₄ and FePO₄ during nonequilibrium battery operation was tracked in real time using time-resolved X-ray diffraction. In conjunction with increasing current density, a metastable crystal phase appears in addition to the thermodynamically stable LiFePO ₄ and FePO₄ phases. The metastable phase gradually diminishes under open-circuit conditions following electrochemical cycling. We propose a phase transition path that passes through the metastable phase and posit the new phase's role in decreasing the nucleation energy, accounting for the excellent rate capability of LiFePO₄. This study is the first to report the measurement of a metastable crystal phase during the electrochemical phase transition of Li_xFePO₄.

Original language	English
Pages (from-to)	5497-5500
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	135
Issue number	15
DOIs	https://doi.org/10.1021/ja312527x
Publication status	Published - Apr 17 2013
Externally published	Yes

All Science Journal Classification (ASJC) codes

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

Access to Document

10.1021/ja312527x

Fingerprint Dive into the research topics of 'Direct observation of a metastable crystal phase of Li<sub>x</sub>FePO <sub>4</sub> under electrochemical phase transition'. Together they form a unique fingerprint.

Cite this

Orikasa, Y., Maeda, T., Koyama, Y., Murayama, H., Fukuda, K., Tanida, H., Arai, H., Matsubara, E., Uchimoto, Y., & Ogumi, Z. (2013). Direct observation of a metastable crystal phase of Li_xFePO ₄ under electrochemical phase transition. Journal of the American Chemical Society, 135(15), 5497-5500. https://doi.org/10.1021/ja312527x

Direct observation of a metastable crystal phase of Li_xFePO ₄ under electrochemical phase transition. / Orikasa, Yuki; Maeda, Takehiro; Koyama, Yukinori; Murayama, Haruno; Fukuda, Katsutoshi; Tanida, Hajime; Arai, Hajime; Matsubara, Eiichiro; Uchimoto, Yoshiharu; Ogumi, Zempachi.

In: Journal of the American Chemical Society, Vol. 135, No. 15, 17.04.2013, p. 5497-5500.

Research output: Contribution to journal › Article

Orikasa, Yuki ; Maeda, Takehiro ; Koyama, Yukinori ; Murayama, Haruno ; Fukuda, Katsutoshi ; Tanida, Hajime ; Arai, Hajime ; Matsubara, Eiichiro ; Uchimoto, Yoshiharu ; Ogumi, Zempachi. / Direct observation of a metastable crystal phase of Li_xFePO ₄ under electrochemical phase transition. In: Journal of the American Chemical Society. 2013 ; Vol. 135, No. 15. pp. 5497-5500.

@article{cd1347030f6c406b99f3af315fce9ebb,

title = "Direct observation of a metastable crystal phase of LixFePO 4 under electrochemical phase transition",

abstract = "The phase transition between LiFePO4 and FePO4 during nonequilibrium battery operation was tracked in real time using time-resolved X-ray diffraction. In conjunction with increasing current density, a metastable crystal phase appears in addition to the thermodynamically stable LiFePO 4 and FePO4 phases. The metastable phase gradually diminishes under open-circuit conditions following electrochemical cycling. We propose a phase transition path that passes through the metastable phase and posit the new phase's role in decreasing the nucleation energy, accounting for the excellent rate capability of LiFePO4. This study is the first to report the measurement of a metastable crystal phase during the electrochemical phase transition of LixFePO4.",

author = "Yuki Orikasa and Takehiro Maeda and Yukinori Koyama and Haruno Murayama and Katsutoshi Fukuda and Hajime Tanida and Hajime Arai and Eiichiro Matsubara and Yoshiharu Uchimoto and Zempachi Ogumi",

year = "2013",

month = apr,

day = "17",

doi = "10.1021/ja312527x",

language = "English",

volume = "135",

pages = "5497--5500",

journal = "Journal of the American Chemical Society",

issn = "0002-7863",

publisher = "American Chemical Society",

number = "15",

}

TY - JOUR

T1 - Direct observation of a metastable crystal phase of LixFePO 4 under electrochemical phase transition

AU - Orikasa, Yuki

AU - Maeda, Takehiro

AU - Koyama, Yukinori

AU - Murayama, Haruno

AU - Fukuda, Katsutoshi

AU - Tanida, Hajime

AU - Arai, Hajime

AU - Matsubara, Eiichiro

AU - Uchimoto, Yoshiharu

AU - Ogumi, Zempachi

PY - 2013/4/17

Y1 - 2013/4/17

N2 - The phase transition between LiFePO4 and FePO4 during nonequilibrium battery operation was tracked in real time using time-resolved X-ray diffraction. In conjunction with increasing current density, a metastable crystal phase appears in addition to the thermodynamically stable LiFePO 4 and FePO4 phases. The metastable phase gradually diminishes under open-circuit conditions following electrochemical cycling. We propose a phase transition path that passes through the metastable phase and posit the new phase's role in decreasing the nucleation energy, accounting for the excellent rate capability of LiFePO4. This study is the first to report the measurement of a metastable crystal phase during the electrochemical phase transition of LixFePO4.

AB - The phase transition between LiFePO4 and FePO4 during nonequilibrium battery operation was tracked in real time using time-resolved X-ray diffraction. In conjunction with increasing current density, a metastable crystal phase appears in addition to the thermodynamically stable LiFePO 4 and FePO4 phases. The metastable phase gradually diminishes under open-circuit conditions following electrochemical cycling. We propose a phase transition path that passes through the metastable phase and posit the new phase's role in decreasing the nucleation energy, accounting for the excellent rate capability of LiFePO4. This study is the first to report the measurement of a metastable crystal phase during the electrochemical phase transition of LixFePO4.

UR - http://www.scopus.com/inward/record.url?scp=84876473056&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84876473056&partnerID=8YFLogxK

U2 - 10.1021/ja312527x

DO - 10.1021/ja312527x

M3 - Article

C2 - 23544671

AN - SCOPUS:84876473056

VL - 135

SP - 5497

EP - 5500

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

SN - 0002-7863

IS - 15

ER -