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 and Kisuk Kang ()
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Zheng-Long Xu: Research Institute of Advanced Materials (RAIM), Seoul National University
Jooha Park: Research Institute of Advanced Materials (RAIM), Seoul National University
Jian Wang: Seoul National University
Hyunseok Moon: Yonsei University
Gabin Yoon: Research Institute of Advanced Materials (RAIM), Seoul National University
Jongwoo Lim: Seoul National University
Yoon-Joo Ko: National Center for Inter-University Research Facilities, Seoul National University
Sung-Pyo Cho: National Center for Inter-University Research Facilities, Seoul National University
Sang-Young Lee: Yonsei University
Kisuk Kang: Research Institute of Advanced Materials (RAIM), Seoul National University

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: 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

Date: 2021
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DOI: 10.1038/s41467-021-23703-x

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