Coordination Polymers Derived General Synthesis of Multishelled Mixed Metal-Oxide Particles for Hybrid Supercapacitors

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Bu Yuan Guan
  • Akihiro Kushima
  • Le Yu
  • Sa Li
  • Ju Li

Detail(s)

Original languageEnglish
Article number1605902
Journal / PublicationAdvanced Materials
Volume29
Issue number17
Publication statusPublished - 3 May 2017
Externally publishedYes

Abstract

Metal–organic frameworks (MOFs) or coordination polymers (CPs) have been used as precursors for synthesis of materials. Unlike crystalline MOF, amorphous CP is nonspecific to metal cation species, therefore its composition can be tuned easily. Here, it is shown that amorphous CP can be used as general synthesis precursors of highly complex mixed metal oxide shells. As a proof of concept, NiCo coordination polymer spheres are first synthesized and subsequently transformed into seven-layered NiCo oxide onions by rapid thermal oxidation. This approach is very versatile and can be applied to produce ternary and quaternary metal oxide onions with tunable size and composition. The NiCo oxide onions exhibit exceptional charge storage capability in aqueous electrolyte with high specific capacitance (≈1900 F g<sup>−1</sup> at 2 A g<sup>−1</sup>), good rate capability, and ultrahigh cycling stability (93.6% retention over 20 000 cycles). A hybrid supercapacitor against graphene/multishelled mesoporous carbon sphere shows a high energy density of 52.6 Wh kg<sup>−1</sup> at a power density of 1604 W kg<sup>−1</sup> (based on active materials weight), as well as remarkable cycling stability. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Research Area(s)

  • coordination polymers, metal-organic frameworks, metal-oxide particles, supercapacitors

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Coordination Polymers Derived General Synthesis of Multishelled Mixed Metal-Oxide Particles for Hybrid Supercapacitors. / Guan, Bu Yuan; Kushima, Akihiro; Yu, Le et al.
In: Advanced Materials, Vol. 29, No. 17, 1605902, 03.05.2017.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review