Improvement of Cathode Properties by Lithium Excess in Disordered Rocksalt Li2+2xMn1−xTi1−xO4

Ayuko Kitajou; Kosuke Tanaka; Hidenori Miki; Hideyuki Koga; Toshihiro Okajima; Shigeto Okada

doi:10.5796/electrochemistry.84.597

Improvement of Cathode Properties by Lithium Excess in Disordered Rocksalt Li2+2xMn1−xTi1−xO4

Ayuko Kitajou, Kosuke Tanaka, Hidenori Miki, Hideyuki Koga, Toshihiro Okajima, Shigeto Okada

Department of Advanced Device Materials

Research output: Contribution to journal › Article › peer-review

Abstract

Although Li2MnTiO4 has a large theoretical capacity (295 mAh g−1), the cathode utilization is limited due to the mixed cation occupation in the disordered rocksalt structure. In this study, we have attempted to prepare single-phase Li2+2xMn1−xTi1−xO4 compositions (0 ≤ x ≤ 0.3) with Li excess to further improve the cathode properties of Li2MnTiO4. The rechargeable capacity of the synthesized Li2.4Mn0.8Ti0.8O4 composition was above 220 mAh g−1, which is larger than those of other disordered Li2MTiO4 (M = Ni, Co, Mn and Fe) series. Moreover, the discharge capacity of Li2.4Mn0.8Ti0.8O4 was ca. 190 mAh g−1 after the 15th cycle, and its capacity retention was 82%.

Original language	English
Pages (from-to)	597-600
Number of pages	4
Journal	Electrochemistry
Volume	84
Issue number	8
DOIs	https://doi.org/10.5796/electrochemistry.84.597
Publication status	Published - 2016

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Improvement of Cathode Properties by Lithium Excess in Disordered Rocksalt Li2+2xMn1−xTi1−xO4 / Kitajou, Ayuko; Tanaka, Kosuke; Miki, Hidenori et al.

In: Electrochemistry, Vol. 84, No. 8, 2016, p. 597-600.

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title = "Improvement of Cathode Properties by Lithium Excess in Disordered Rocksalt Li2+2xMn1−xTi1−xO4",

abstract = "Although Li2MnTiO4 has a large theoretical capacity (295 mAh g−1), the cathode utilization is limited due to the mixed cation occupation in the disordered rocksalt structure. In this study, we have attempted to prepare single-phase Li2+2xMn1−xTi1−xO4 compositions (0 ≤ x ≤ 0.3) with Li excess to further improve the cathode properties of Li2MnTiO4. The rechargeable capacity of the synthesized Li2.4Mn0.8Ti0.8O4 composition was above 220 mAh g−1, which is larger than those of other disordered Li2MTiO4 (M = Ni, Co, Mn and Fe) series. Moreover, the discharge capacity of Li2.4Mn0.8Ti0.8O4 was ca. 190 mAh g−1 after the 15th cycle, and its capacity retention was 82%.",

author = "Ayuko Kitajou and Kosuke Tanaka and Hidenori Miki and Hideyuki Koga and Toshihiro Okajima and Shigeto Okada",

year = "2016",

doi = "10.5796/electrochemistry.84.597",

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T1 - Improvement of Cathode Properties by Lithium Excess in Disordered Rocksalt Li2+2xMn1−xTi1−xO4

AU - Kitajou, Ayuko

AU - Tanaka, Kosuke

AU - Miki, Hidenori

AU - Koga, Hideyuki

AU - Okajima, Toshihiro

AU - Okada, Shigeto

PY - 2016

Y1 - 2016

N2 - Although Li2MnTiO4 has a large theoretical capacity (295 mAh g−1), the cathode utilization is limited due to the mixed cation occupation in the disordered rocksalt structure. In this study, we have attempted to prepare single-phase Li2+2xMn1−xTi1−xO4 compositions (0 ≤ x ≤ 0.3) with Li excess to further improve the cathode properties of Li2MnTiO4. The rechargeable capacity of the synthesized Li2.4Mn0.8Ti0.8O4 composition was above 220 mAh g−1, which is larger than those of other disordered Li2MTiO4 (M = Ni, Co, Mn and Fe) series. Moreover, the discharge capacity of Li2.4Mn0.8Ti0.8O4 was ca. 190 mAh g−1 after the 15th cycle, and its capacity retention was 82%.

AB - Although Li2MnTiO4 has a large theoretical capacity (295 mAh g−1), the cathode utilization is limited due to the mixed cation occupation in the disordered rocksalt structure. In this study, we have attempted to prepare single-phase Li2+2xMn1−xTi1−xO4 compositions (0 ≤ x ≤ 0.3) with Li excess to further improve the cathode properties of Li2MnTiO4. The rechargeable capacity of the synthesized Li2.4Mn0.8Ti0.8O4 composition was above 220 mAh g−1, which is larger than those of other disordered Li2MTiO4 (M = Ni, Co, Mn and Fe) series. Moreover, the discharge capacity of Li2.4Mn0.8Ti0.8O4 was ca. 190 mAh g−1 after the 15th cycle, and its capacity retention was 82%.

U2 - 10.5796/electrochemistry.84.597

DO - 10.5796/electrochemistry.84.597

M3 - Article

SN - 1344-3542

VL - 84

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JO - Electrochemistry

JF - Electrochemistry

IS - 8

ER -

Improvement of Cathode Properties by Lithium Excess in Disordered Rocksalt Li<sub>2+2</sub><i><sub>x</sub></i>Mn<sub>1−</sub><i><sub>x</sub></i>Ti<sub>1−</sub><i><sub>x</sub></i>O<sub>4</sub>

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