Journal
DALTON TRANSACTIONS
Volume 49, Issue 30, Pages 10535-10544Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0dt02127j
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Funding
- National Natural Science Foundation of China [21971131, 21471086]
- K. C. Wong Magna Fund in Ningbo University
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Transition metal sulfides are important candidates of battery-type electrode materials for advanced supercapatteries due to their high electric conductivity and electrochemical activity. The Co9S8@Ni3S2/ZnS composite microplate array was prepared by a metal-organic framework-assisted strategy because the electrochemical properties of composite arrays are governed by the synergistic effects of their diverse structures and compositions. As a battery-type material, the Co9S8@Ni3S2/ZnS electrode expressed an ultrahigh areal specific capacity of 8192 C cm(-2) at the current density of 2 mA cm(-2), and excellent cycling stability of 79.7% capacitance retention after 4000 cycles. An assembled supercapattery device using the Co9S8@Ni3S2/ZnS microplate array as a positive electrode and active carbon as the negative electrode delivered a high energy density of 0.377 mW h cm(-2) at a high power density of 1.517 mW cm(-2), and outstanding retention of 95.2% after 5000 cycles. As a result, the obtained Co9S8@Ni3S2/ZnS shows potential for applications in high-performance supercapattery.
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