Cobalt-molybdenum selenide double-shelled hollow nanocages derived from metal-organic frameworks as high performance electrodes for hybrid supercapacitor

Amiri, Maryam, Davarani, Saied Saeed Hosseiny, Moosavifard, Seyyed Ebrahim and Fu, Yong Qing (2022) Cobalt-molybdenum selenide double-shelled hollow nanocages derived from metal-organic frameworks as high performance electrodes for hybrid supercapacitor. Journal of Colloid and Interface Science, 616. pp. 141-151. ISSN 0021-9797

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Official URL: https://doi.org/10.1016/j.jcis.2022.02.063

Abstract

In this paper, we developed a sequential chemical etching and selenization processes to synthesize Co-MoSex double-shelled hollow nanocages (CMS DSHNCs) as high performance electrode materials for supercapacitor applications. Co-MoOx yolk-shelled hollow nanocages were firstly synthesized using a solvothermal process through facile ion-exchange reactions between zeolitic imidazolate framework-67 (ZIF-67) and MoO42- ions. By applying a solvothermal temperature of 160 oC in the presence of SeO32- and subsequently annealing strategy, CMS-DSHNCs were successfully synthesized with a yolk-shell hierarchically hollow and porous morphology of mixed metal selenides. The CMS-DSHNCs exhibit superior electrochemical properties as electrode materials for supercapacitor: e.g., a specific capacity of 1029.8 C g-1 at 2 A g-1 (3.089 C cm-2 at 6mA cm-2), a rate capability of ~76.14, a capacity retention at 50 A g-1, and a good cycle stability (95.2 capacity retention over 8000 cycles). A hybrid supercapacitor was constructed using the CMS-DSHNCs as the cathode and activated carbon (AC) as the anode in a solution of 3 M KOH, and achieved a high specific energy of 45 Wh kg−1, and a specific power up to 2222 W kg−1 with a good cycling stability of 94 after 8000 cycles.

Item Type: Article
Uncontrolled Keywords: Capacitive-type electrode, double-shelled and hollow nanocages, Co-MoSex, asymmetric supercapacitor
Subjects: F200 Materials Science
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: John Coen
Date Deposited: 22 Feb 2022 12:36
Last Modified: 08 Mar 2022 09:45
URI: http://nrl.northumbria.ac.uk/id/eprint/48516

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