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Title: | Ultrastable and high energy calcium rechargeable batteries enabled by calcium intercalation in a NASICON cathode | Authors: | Chen, C Shi, F Zhang, S Su, Y Xu, ZL |
Issue Date: | 7-Apr-2022 | Source: | Small, 7 Apr. 2022, v. 18, no. 14, 2107853 | Abstract: | Ca-ion batteries (CIBs) have been considered a promising candidate for the next-generation energy storage technology owing to the abundant calcium element and the low reduction potential of Ca2+/Ca. However, the large size and divalent nature of Ca2+ induce significant volume change and sluggish ion mobility in intercalation cathodes, leading to poor reversibly and low energy/power densities for CIBs. Herein, a polyanionic Na superionic conduction (NASICON)-typed Na-vacant Na1V2(PO4)2F3 (N1PVF3) with sufficient interstitial spaces is reported as ultra-stable and high-energy Ca ion cathodes. The N1PVF3 delivers exceptionally high Ca storage capacities of 110 and 65 mAh g-1 at 10 and 500 mA g–1, respectively, and a record-long cyclability of 2000 cycles. More interestingly, by tailoring the fluorine content in N1PVFx (1 ≤ x ≤ 3), the high working potential of 3.5 V versus Ca2+/Ca is achievable. In conjunction with Ca metal anode and a compatible electrolyte, Ca metal batteries with N1VPF3 cathodes are constructed, which deliver an initial energy density of 342 W h kg-1, representing one of the highest values thus far reported for CIBs. Origins of the uncommonly stable and high-power capabilities for N1PVF3 are elucidated as the small volume changes and low cation diffusion barriers among the cathodes. | Keywords: | Ca ion batteries Cathode materials full cells NASICON structure |
Publisher: | Wiley-VCH | Journal: | Small | ISSN: | 1613-6810 | EISSN: | 1613-6829 | DOI: | 10.1002/smll.202107853 | Rights: | © 2022 Wiley-VCH GmbH This is the peer reviewed version of the following article: Chen, C., Shi, F., Zhang, S., Su, Y., Xu, Z.-L., Ultrastable and High Energy Calcium Rechargeable Batteries Enabled by Calcium Intercalation in a NASICON Cathode. Small 2022, 18, 2107853, which has been published in final form at https://doi.org/10.1002/smll.202107853. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. |
Appears in Collections: | Journal/Magazine Article |
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Chen_Ultrastable_High_Energy.pdf | Pre-Published version | 1.91 MB | Adobe PDF | View/Open |
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