Preparation of Li2S-FeS2 composite electrode materials and their electrochemical properties

Tomonari Takeuchi; Hiroyuki Kageyama; Koji Nakanishi; Toshiaki Ohta; Atsushi Sakuda; Hikari Sakaebe; Hiroshi Senoh; Tetsuo Sakai; Kuniaki Tatsumi; Hironori Kobayashi; Zempachi Ogumi

doi:10.2497/jjspm.60.13

Preparation of Li₂S-FeS₂ composite electrode materials and their electrochemical properties

Tomonari Takeuchi, Hiroyuki Kageyama, Koji Nakanishi, Toshiaki Ohta, Atsushi Sakuda, Hikari Sakaebe, Hiroshi Senoh, Tetsuo Sakai, Kuniaki Tatsumi, Hironori Kobayashi, Zempachi Ogumi

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3 Citations (Scopus)

Abstract

Li₂S-FeS₂ composite positive electrode materials were prepared for improving the discharge capacity of the allsolid-state In/Li ₂S cells via the electrical conductivity enhancement of Li ₂S. The electrochemical tests demonstrated that the In/Li ₂S-FeS₂ (Li₂S: FeS₂ = 3:7 wt) cells showed relatively higher discharge capacity (ca. 180 mAh • g^-1, normalized by the cathode weight) than that of the In/Li₂S-C cells (ca. 140 mAh •g^-1), due to the increased fraction of the active materials in the cathodes. The ex-situ XRD and S K-edge XAFS results indicated that the In/Li₂S-FeS₂ cells showed similar electrochemical reaction to that of the Li/Li₂S-FeS₂ cells with liquid electrolytes during charge, but did not proceed to form Li₂S and Fe during discharge. Such difference was due to the limited amounts of Li ions supplied from the lithiated-In anode during discharge for the In/Li ₂S-FeS₂ cells.

Original language	English
Pages (from-to)	13-18
Number of pages	6
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	60
Issue number	1
DOIs	https://doi.org/10.2497/jjspm.60.13
Publication status	Published - Jan 2013
Externally published	Yes

All Science Journal Classification (ASJC) codes

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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10.2497/jjspm.60.13

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Takeuchi, T., Kageyama, H., Nakanishi, K., Ohta, T., Sakuda, A., Sakaebe, H., Senoh, H., Sakai, T., Tatsumi, K., Kobayashi, H., & Ogumi, Z. (2013). Preparation of Li₂S-FeS₂ composite electrode materials and their electrochemical properties. Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, 60(1), 13-18. https://doi.org/10.2497/jjspm.60.13

Takeuchi, T, Kageyama, H, Nakanishi, K, Ohta, T, Sakuda, A, Sakaebe, H, Senoh, H, Sakai, T, Tatsumi, K, Kobayashi, H & Ogumi, Z 2013, 'Preparation of Li₂S-FeS₂ composite electrode materials and their electrochemical properties', Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, vol. 60, no. 1, pp. 13-18. https://doi.org/10.2497/jjspm.60.13

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title = "Preparation of Li2S-FeS2 composite electrode materials and their electrochemical properties",

abstract = "Li2S-FeS2 composite positive electrode materials were prepared for improving the discharge capacity of the allsolid-state In/Li 2S cells via the electrical conductivity enhancement of Li 2S. The electrochemical tests demonstrated that the In/Li 2S-FeS2 (Li2S: FeS2 = 3:7 wt) cells showed relatively higher discharge capacity (ca. 180 mAh • g-1, normalized by the cathode weight) than that of the In/Li2S-C cells (ca. 140 mAh •g-1), due to the increased fraction of the active materials in the cathodes. The ex-situ XRD and S K-edge XAFS results indicated that the In/Li2S-FeS2 cells showed similar electrochemical reaction to that of the Li/Li2S-FeS2 cells with liquid electrolytes during charge, but did not proceed to form Li2S and Fe during discharge. Such difference was due to the limited amounts of Li ions supplied from the lithiated-In anode during discharge for the In/Li 2S-FeS2 cells.",

author = "Tomonari Takeuchi and Hiroyuki Kageyama and Koji Nakanishi and Toshiaki Ohta and Atsushi Sakuda and Hikari Sakaebe and Hiroshi Senoh and Tetsuo Sakai and Kuniaki Tatsumi and Hironori Kobayashi and Zempachi Ogumi",

year = "2013",

month = jan,

doi = "10.2497/jjspm.60.13",

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pages = "13--18",

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AU - Takeuchi, Tomonari

AU - Kageyama, Hiroyuki

AU - Nakanishi, Koji

AU - Ohta, Toshiaki

AU - Sakuda, Atsushi

AU - Sakaebe, Hikari

AU - Senoh, Hiroshi

AU - Sakai, Tetsuo

AU - Tatsumi, Kuniaki

AU - Kobayashi, Hironori

AU - Ogumi, Zempachi

PY - 2013/1

Y1 - 2013/1

N2 - Li2S-FeS2 composite positive electrode materials were prepared for improving the discharge capacity of the allsolid-state In/Li 2S cells via the electrical conductivity enhancement of Li 2S. The electrochemical tests demonstrated that the In/Li 2S-FeS2 (Li2S: FeS2 = 3:7 wt) cells showed relatively higher discharge capacity (ca. 180 mAh • g-1, normalized by the cathode weight) than that of the In/Li2S-C cells (ca. 140 mAh •g-1), due to the increased fraction of the active materials in the cathodes. The ex-situ XRD and S K-edge XAFS results indicated that the In/Li2S-FeS2 cells showed similar electrochemical reaction to that of the Li/Li2S-FeS2 cells with liquid electrolytes during charge, but did not proceed to form Li2S and Fe during discharge. Such difference was due to the limited amounts of Li ions supplied from the lithiated-In anode during discharge for the In/Li 2S-FeS2 cells.

AB - Li2S-FeS2 composite positive electrode materials were prepared for improving the discharge capacity of the allsolid-state In/Li 2S cells via the electrical conductivity enhancement of Li 2S. The electrochemical tests demonstrated that the In/Li 2S-FeS2 (Li2S: FeS2 = 3:7 wt) cells showed relatively higher discharge capacity (ca. 180 mAh • g-1, normalized by the cathode weight) than that of the In/Li2S-C cells (ca. 140 mAh •g-1), due to the increased fraction of the active materials in the cathodes. The ex-situ XRD and S K-edge XAFS results indicated that the In/Li2S-FeS2 cells showed similar electrochemical reaction to that of the Li/Li2S-FeS2 cells with liquid electrolytes during charge, but did not proceed to form Li2S and Fe during discharge. Such difference was due to the limited amounts of Li ions supplied from the lithiated-In anode during discharge for the In/Li 2S-FeS2 cells.

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Preparation of Li₂S-FeS₂ composite electrode materials and their electrochemical properties

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