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FeS Quatum Dots Embedded in 3D Ordered Macroporous Carbon Nanocomposite for High-performance Sodium-ion Hybrid Capacitors

Abstract

Sodium-ion hybrid capacitors (SIHCs) show great promise in achieving both high energy density and high power density by virtue of synergizing the merits of batteries and capacitors. However, the lack of favorable anode material with superior sodium-ion storage capability is still the major challenge for developing high-performance SIHCs. We herein report the design and synthesis of a promissing sodium ion storage nanohybrid with FeS quantum dots embedding in three dimensional (3D) inverse opals (IO) structured N-doped carbon (3D-IO FeS-QDs@NC). In virtue of the robust 3D conductive architechture, the 3D-IO FeS-QDs@NC nanohybrid exhibits favorable features of excellent electron/ion transport kinetics, superior structural stability, as well as impressive sodium ion storage capability with high specific capacity, outstanding rate capability, and ultralong cyclic stability. Such highly desirable sodium storage performance inspires us to study their potential application in SHICs by coupling with commercial activated carbon (AC) as cathode. The as-developed SHICs can deliver a maximum energy density and power output of 151.8 Wh kg−1 and 9280 W kg−1, respectively, and an excellent cycling lifespan with 91% capacity retention after 5000 cycles at 1 A g−1, which holds promise for bridging the performance gap between conventional batteries and capacitors.

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Publication details

The article was received on 31 Oct 2018, accepted on 03 Dec 2018 and first published on 03 Dec 2018


Article type: Paper
DOI: 10.1039/C8TA10468A
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    FeS Quatum Dots Embedded in 3D Ordered Macroporous Carbon Nanocomposite for High-performance Sodium-ion Hybrid Capacitors

    X. Hu, Y. Liu, J. Chen, J. Jia, H. Zhan and Z. Wen, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA10468A

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