fast ionic conduction
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2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Zheng-Long Xu ◽  
Jooha Park ◽  
Jian Wang ◽  
Hyunseok Moon ◽  
Gabin Yoon ◽  
...  

AbstractRechargeable 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.


2017 ◽  
Vol 345 ◽  
pp. 176-181 ◽  
Author(s):  
Bhupendra Singh ◽  
Aman Bhardwaj ◽  
Sandeep K. Gautam ◽  
Devendra Kumar ◽  
Om Parkash ◽  
...  

Ionics ◽  
2010 ◽  
Vol 16 (9) ◽  
pp. 855-858 ◽  
Author(s):  
Torsten Zaiß ◽  
Martin Ortner ◽  
Ramaswamy Murugan ◽  
Werner Weppner

2007 ◽  
Vol 353 (18-21) ◽  
pp. 2069-2073 ◽  
Author(s):  
Mai Sekine ◽  
Y. Suzuki ◽  
H. Ueno ◽  
Y. Onodera ◽  
T. Usuki ◽  
...  

2005 ◽  
Vol 8 (1) ◽  
pp. A22 ◽  
Author(s):  
Yoichi Tominaga ◽  
Shigeo Asai ◽  
Masao Sumita ◽  
Stefania Panero ◽  
Bruno Scrosati

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