Capacity improvement by deficit of transition metals in inverse spinel LiNi1/3Co1/3Mn1/3VO4 cathodes

Ayuko Kitajou; Jun Yoshida; Shinji Nakanishi; Yasuaki Matsuda; Ryoji Kanno; Toshihiro Okajima; Shigeto Okada

doi:10.1016/j.jpowsour.2015.10.058

Capacity improvement by deficit of transition metals in inverse spinel LiNi_1/3Co_1/3Mn_1/3VO₄ cathodes

Ayuko Kitajou, Jun Yoshida, Shinji Nakanishi, Yasuaki Matsuda, Ryoji Kanno, Toshihiro Okajima, Shigeto Okada

Department of Advanced Device Materials

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

1 Citation (Scopus)

Abstract

Although inverse spinel materials have attracted attention because of their unusually high voltage characteristics, their rechargeable capacities are generally less than 50 mAh g^-1, as a result of the coexistence of Li and transition metal ions at 16d octahedral sites. This work attempted to improve cathode functioning by optimizing the quantities of Li and transition metal ions residing at the 16d sites of LiNi_1/3Co_1/3Mn_1/3VO₄. The rechargeable capacity of the LiNi_0.28Co_0.28Mn_0.26V_0.80O₄ synthesized in the present study was found to be above 120 mAh g^-1, representing the largest capacity reported to date for an inverse spinel material. The results of in-situ XANES analysis demonstrated that the charge-discharge reactions of LiNi_1/3Co_1/3Mn_1/3VO₄ corresponds to the Mn²⁺/Mn⁴⁺ and Co²⁺/Co³⁺ redox couples, mainly.

Original language	English
Pages (from-to)	240-246
Number of pages	7
Journal	Journal of Power Sources
Volume	302
DOIs	https://doi.org/10.1016/j.jpowsour.2015.10.058
Publication status	Published - Jan 20 2016

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jpowsour.2015.10.058

Cite this

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title = "Capacity improvement by deficit of transition metals in inverse spinel LiNi1/3Co1/3Mn1/3VO4 cathodes",

abstract = "Although inverse spinel materials have attracted attention because of their unusually high voltage characteristics, their rechargeable capacities are generally less than 50 mAh g-1, as a result of the coexistence of Li and transition metal ions at 16d octahedral sites. This work attempted to improve cathode functioning by optimizing the quantities of Li and transition metal ions residing at the 16d sites of LiNi1/3Co1/3Mn1/3VO4. The rechargeable capacity of the LiNi0.28Co0.28Mn0.26V0.80O4 synthesized in the present study was found to be above 120 mAh g-1, representing the largest capacity reported to date for an inverse spinel material. The results of in-situ XANES analysis demonstrated that the charge-discharge reactions of LiNi1/3Co1/3Mn1/3VO4 corresponds to the Mn2+/Mn4+ and Co2+/Co3+ redox couples, mainly.",

author = "Ayuko Kitajou and Jun Yoshida and Shinji Nakanishi and Yasuaki Matsuda and Ryoji Kanno and Toshihiro Okajima and Shigeto Okada",

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T1 - Capacity improvement by deficit of transition metals in inverse spinel LiNi1/3Co1/3Mn1/3VO4 cathodes

AU - Kitajou, Ayuko

AU - Yoshida, Jun

AU - Nakanishi, Shinji

AU - Matsuda, Yasuaki

AU - Kanno, Ryoji

AU - Okajima, Toshihiro

AU - Okada, Shigeto

PY - 2016/1/20

Y1 - 2016/1/20

N2 - Although inverse spinel materials have attracted attention because of their unusually high voltage characteristics, their rechargeable capacities are generally less than 50 mAh g-1, as a result of the coexistence of Li and transition metal ions at 16d octahedral sites. This work attempted to improve cathode functioning by optimizing the quantities of Li and transition metal ions residing at the 16d sites of LiNi1/3Co1/3Mn1/3VO4. The rechargeable capacity of the LiNi0.28Co0.28Mn0.26V0.80O4 synthesized in the present study was found to be above 120 mAh g-1, representing the largest capacity reported to date for an inverse spinel material. The results of in-situ XANES analysis demonstrated that the charge-discharge reactions of LiNi1/3Co1/3Mn1/3VO4 corresponds to the Mn2+/Mn4+ and Co2+/Co3+ redox couples, mainly.

AB - Although inverse spinel materials have attracted attention because of their unusually high voltage characteristics, their rechargeable capacities are generally less than 50 mAh g-1, as a result of the coexistence of Li and transition metal ions at 16d octahedral sites. This work attempted to improve cathode functioning by optimizing the quantities of Li and transition metal ions residing at the 16d sites of LiNi1/3Co1/3Mn1/3VO4. The rechargeable capacity of the LiNi0.28Co0.28Mn0.26V0.80O4 synthesized in the present study was found to be above 120 mAh g-1, representing the largest capacity reported to date for an inverse spinel material. The results of in-situ XANES analysis demonstrated that the charge-discharge reactions of LiNi1/3Co1/3Mn1/3VO4 corresponds to the Mn2+/Mn4+ and Co2+/Co3+ redox couples, mainly.

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