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Title: A nonpresodiate sodium-ion capacitor with high performance
Authors: Li, Shaohui
Chen, Jingwei
Gong, Xuefei
Wang, Jiangxin
Lee, Pooi See
Keywords: Engineering::Materials
Issue Date: 2018
Source: Li, S., Chen, J., Gong, X., Wang, J. & Lee, P. S. (2018). A nonpresodiate sodium-ion capacitor with high performance. Small, 14(50), e1804035-.
Project: NRF-NRFI2016-05
Journal: Small
Abstract: Sodium-ion capacitors (SICs) have received intensive attention due to their high energy density, high power density, long cycle life, and low cost of sodium. However, the lack of high-performance anode materials and the tedious presodiation process hinders the practical applications of SICs. A simple and effective strategy is reported to fabricate a high-performance SIC using Fe1-x S as the anode material and an ether-based electrolyte. The Fe1-x S electrode is found to undergo a reversible intercalation reaction after the first cycle, resulting in fast kinetics and excellent reversibility. The Fe1-x S electrode delivers a high capacity of 340 mAh g-1 at 0.05 A g-1 , 179 mAh g-1 at high current of 5 A g-1 and an ultralong cycling performance with 95% capacity retention after 7000 cycles. Coupled with a carbon-based cathode, a high-performance SIC without the presodiation process is successfully fabricated. The hybrid device demonstrates an excellent energy density of 88 Wh kg-1 and superior power density of 11 500 W kg-1 , as well as an ultralong lifetime of 9000 cycles with over 93% capacity retention. An innovative and efficient way to fabricate SICs with both high energy and power density utilizing ether-based electrolytes can be realized to eliminate the presodiation process.
ISSN: 1613-6810
DOI: 10.1002/smll.201804035
Rights: © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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