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All-climate aqueous Na-ion batteries using "water-in-salt" electrolyte.
- Source :
-
Science Bulletin . Jan2022, Vol. 67 Issue 2, p161-170. 10p. - Publication Year :
- 2022
-
Abstract
- [Display omitted] Aqueous Na-ion batteries have been extensively studied for large-scale energy storage systems. However, their wide application is still limited by their inferior cycle stability (<3000 cycles) and poor temperature tolerance. Furthermore, many of the reported high rate behaviors are achieved at a low mass loading (<3 mg cm−2) of the electrodes. Herein, we propose an aqueous Na-ion battery which includes a Ni-based Prussian blue (NiHCF) cathode, a carbonyl-based organic compound, 5,7,12,14-pentacenetetrone (PT) anode and a "water-in-salt" electrolyte (17 mol kg−1 NaClO 4 in water). Its operation involves the reversible coordination reaction of the PT anode and the extraction/insertion of Na+ in the NiHCF cathode. It is demonstrated that the wide internal spaces of the PT anode and NiHCF cathode can not only buffer the volumetric change induced by Na+ storage, but also enable fast kinetics. The full cell exhibits a supercapacitor-like rate performance of 50 A g−1 (corresponding to a discharge or charge within 6.3 s) and a super-long lifespan of 15,000 cycles. Moreover, the excellent rate performance can still be preserved even with a high mass loading of the electrodes (15 mg NiHCF cm−2 and 8 mg PT cm−2). Especially, the cell can work well in a wide temperature range, from −40 to 100 °C, showing a typical all-climate operation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20959273
- Volume :
- 67
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Science Bulletin
- Publication Type :
- Academic Journal
- Accession number :
- 154436468
- Full Text :
- https://doi.org/10.1016/j.scib.2021.08.010