Charge-Discharge Characteristics of a LiNi1/3Mn1/3Co1/3O2 Cathode in FSI-based Ionic Liquids

Yukiko MATSUI; Shunsuke KAWAGUCHI; Toshinori SUGIMOTO; Manabu KIKUTA; Tetsuya HIGASHIZAKI; Michiyuki KONO; Masaki YAMAGATA; Masashi ISHIKAWA

doi:10.5796/electrochemistry.80.808

Articles

Charge-Discharge Characteristics of a LiNi_1/3Mn_1/3Co_1/3O₂ Cathode in FSI-based Ionic Liquids

Yukiko MATSUI, Shunsuke KAWAGUCHI, Toshinori SUGIMOTO, Manabu KIKUTA, Tetsuya HIGASHIZAKI, Michiyuki KONO, Masaki YAMAGATA, Masashi ISHIKAWA

Author information

Yukiko MATSUI
Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University
Shunsuke KAWAGUCHI
Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University
Toshinori SUGIMOTO
Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University
Elexcel Co., Ltd.
Manabu KIKUTA
Dai-ichi Kogyo Seiyaku Co., Ltd.
Tetsuya HIGASHIZAKI
Elexcel Co., Ltd.
Michiyuki KONO
Elexcel Co., Ltd.
Masaki YAMAGATA
Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University
Masashi ISHIKAWA
Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University

Keywords: Lithium-Ion Battery, Ionic Liquids, Bis(Fluorosulfonyl)Imide, LiNi_1/3Mn_1/3Co_1/3O₂

JOURNAL FREE ACCESS

2012 Volume 80 Issue 10 Pages 808-811

DOI https://doi.org/10.5796/electrochemistry.80.808

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Abstract

We evaluated the charge-discharge behavior of a LiNi_1/3Mn_1/3Co_1/3O₂ (NMC) electrode in a 1-ethyl-3-methylimidazolium bis(fluorosulfonyl)imide (EMImFSI) ionic liquid. At 163 mAh g⁻¹ after 50 cycles, the discharge capacity of the NMC cathode in LiTFSI/EMImFSI (TFSI⁻ = bis(trifluoromethylsulfonyl)imide) at 1.0 C in the voltage range 3.0–4.5 V (vs. Li/Li⁺) is comparable to that in the conventional electrolyte, LiPF₆/EC+DMC. Moreover, the rate capability of the cell with LiTFSI/EMImFSI exceeded that with LiPF₆/EC+DMC, especially at high rates, probably owing to the low resistance at the electrode/electrolyte interface. These results suggest that EMImFSI is a suitable electrolyte for lithium-ion batteries utilizing an NMC cathode.

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