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Title: Flexible quasi-solid-state sodium-ion capacitors developed using 2D metal-organic-framework array as reactor
Authors: Xu, Dongming
Chao, Dongliang
Wang, Huanwen
Gong, Yansheng
Wang, Rui
He, Beibei
Hu, Xianluo
Fan, Hong Jin
Keywords: DRNTU::Science::Physics
Asymmetric Supercapacitors
Hybrid Batteries
Issue Date: 2018
Source: Xu, D., Chao, D., Wang, H., Gong, Y., Wang, R., He, B., . . . Fan, H. J. (2018). Flexible quasi-solid-state sodium-ion capacitors developed using 2D metal-organic-framework array as reactor. Advanced Energy Materials, 8(13), 1702769-. doi:10.1002/aenm.201702769
Series/Report no.: Advanced Energy Materials
Abstract: Achieving high-performance Na-ion capacitors (NICs) has the particular challenge of matching both capacity and kinetics between the anode and cathode. Here we report a high-power NIC full device constructed from 2D metal-organic frameworks (MOFs) array as the reactive template. The MOF array is converted to N-doped mesoporous carbon nanosheets (mp-CNSs), which are then uniformly encapsulated with VO2 and Na3V2(PO4)3 (NVP) nanoparticles as the electroactive materials. By this method, we are able to enhance significantly the high-power performance of the battery materials. It is discovered that such hybrid NVP@mp-CNSs array can render ultrahigh rate capability (up to 200 C, equivalent to discharge within 18 s) and superior cycle performance, which outperforms all NVP-based Na-ion battery cathode reported so far. We further assemble a quasi-solid-state flexible NIC based on the NVP@mp-CNSs cathode and the VO2@mp-CNSs anode. This hybrid NIC device delivers both high energy density and power density as well as a good cycle stability (78% retention after 2000 cycles at 1 A g−1 ). Our results demonstrate the powerfulness of MOF array as the reactor for fabricating electrode materials.
ISSN: 1614-6832
DOI: 10.1002/aenm.201702769
Rights: © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. This paper was published in Advanced Energy Materials and is made available with permission of WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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