A new high-voltage calcium intercalation host for ultra-stable and high-power calcium rechargeable batteries

Zheng Long Xu; Jooha Park; Jian Wang; Hyunseok Moon; Gabin Yoon; Jongwoo Lim; Yoon Joo Ko; Sung Pyo Cho; Sang Young Lee; Kisuk Kang

doi:10.1038/s41467-021-23703-x

A new high-voltage calcium intercalation host for ultra-stable and high-power calcium rechargeable batteries

Zheng Long Xu, Jooha Park, Jian Wang, Hyunseok Moon, Gabin Yoon, Jongwoo Lim, Yoon Joo Ko, Sung Pyo Cho, Sang Young Lee, Kisuk Kang

Department of Chemical and Biomolecular Engineering

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

50 Citations (Scopus)

Abstract

Rechargeable calcium batteries have attracted increasing attention as promising multivalent ion battery systems due to the high abundance of calcium. However, the development has been hampered by the lack of suitable cathodes to accommodate the large and divalent Ca²⁺ ions at a high redox potential with sufficiently fast ionic conduction. Herein, we report a new intercalation host which presents 500 cycles with a capacity retention of 90% and a remarkable power capability at ~3.2 V (vs. Ca/Ca²⁺) in a calcium battery. The cathode material derived from Na_0.5VPO_4.8F_0.7 is demonstrated to reversibly accommodate a large amount of Ca²⁺ ions, forming a series of Ca_xNa_0.5VPO_4.8F_0.7 (0 < x < 0.5) phases without any noticeable structural degradation. The robust framework enables one of the smallest volume changes (1.4%) and the lowest diffusion barriers for Ca²⁺ among the cathodes reported to date, offering the basis for the outstanding cycle life and power capability.

Original language	English
Article number	3369
Journal	Nature communications
Volume	12
Issue number	1
DOIs	https://doi.org/10.1038/s41467-021-23703-x
Publication status	Published - 2021 Dec 1

Bibliographical note

Publisher Copyright:
© 2021, The Author(s).

All Science Journal Classification (ASJC) codes

Chemistry(all)
Biochemistry, Genetics and Molecular Biology(all)
Physics and Astronomy(all)

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title = "A new high-voltage calcium intercalation host for ultra-stable and high-power calcium rechargeable batteries",

abstract = "Rechargeable calcium batteries have attracted increasing attention as promising multivalent ion battery systems due to the high abundance of calcium. However, the development has been hampered by the lack of suitable cathodes to accommodate the large and divalent Ca2+ ions at a high redox potential with sufficiently fast ionic conduction. Herein, we report a new intercalation host which presents 500 cycles with a capacity retention of 90% and a remarkable power capability at ~3.2 V (vs. Ca/Ca2+) in a calcium battery. The cathode material derived from Na0.5VPO4.8F0.7 is demonstrated to reversibly accommodate a large amount of Ca2+ ions, forming a series of CaxNa0.5VPO4.8F0.7 (0 < x < 0.5) phases without any noticeable structural degradation. The robust framework enables one of the smallest volume changes (1.4%) and the lowest diffusion barriers for Ca2+ among the cathodes reported to date, offering the basis for the outstanding cycle life and power capability.",

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AU - Park, Jooha

AU - Wang, Jian

AU - Moon, Hyunseok

AU - Yoon, Gabin

AU - Lim, Jongwoo

AU - Ko, Yoon Joo

AU - Cho, Sung Pyo

AU - Lee, Sang Young

AU - Kang, Kisuk

PY - 2021/12/1

Y1 - 2021/12/1

N2 - Rechargeable calcium batteries have attracted increasing attention as promising multivalent ion battery systems due to the high abundance of calcium. However, the development has been hampered by the lack of suitable cathodes to accommodate the large and divalent Ca2+ ions at a high redox potential with sufficiently fast ionic conduction. Herein, we report a new intercalation host which presents 500 cycles with a capacity retention of 90% and a remarkable power capability at ~3.2 V (vs. Ca/Ca2+) in a calcium battery. The cathode material derived from Na0.5VPO4.8F0.7 is demonstrated to reversibly accommodate a large amount of Ca2+ ions, forming a series of CaxNa0.5VPO4.8F0.7 (0 < x < 0.5) phases without any noticeable structural degradation. The robust framework enables one of the smallest volume changes (1.4%) and the lowest diffusion barriers for Ca2+ among the cathodes reported to date, offering the basis for the outstanding cycle life and power capability.

AB - Rechargeable calcium batteries have attracted increasing attention as promising multivalent ion battery systems due to the high abundance of calcium. However, the development has been hampered by the lack of suitable cathodes to accommodate the large and divalent Ca2+ ions at a high redox potential with sufficiently fast ionic conduction. Herein, we report a new intercalation host which presents 500 cycles with a capacity retention of 90% and a remarkable power capability at ~3.2 V (vs. Ca/Ca2+) in a calcium battery. The cathode material derived from Na0.5VPO4.8F0.7 is demonstrated to reversibly accommodate a large amount of Ca2+ ions, forming a series of CaxNa0.5VPO4.8F0.7 (0 < x < 0.5) phases without any noticeable structural degradation. The robust framework enables one of the smallest volume changes (1.4%) and the lowest diffusion barriers for Ca2+ among the cathodes reported to date, offering the basis for the outstanding cycle life and power capability.

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A new high-voltage calcium intercalation host for ultra-stable and high-power calcium rechargeable batteries

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