High faradaic charge storage in ZnCo2S4 film on Ni-foam with a hetero-dimensional microstructure for hybrid supercapacitor

Pramanik, Atin; Maiti, Sandipan; Dhawa, Tanumoy; Sreemany, Monjoy; Mahanty, Sourindra

doi:10.1016/j.mtener.2018.07.007

Cited by 69 publications

(17 citation statements)

References 72 publications

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“…Therefore, the S 2 s spectrum is shown in Figure S5a. The first component at about 226.32 eV is derived from the formation of metal‐sulfide (Zn/Co−S) and the second component at about 231.63 eV is ascribed to oxygenated sulfur . All results confirm the ZCS sample has a composition of Zn 2+ , Co 2+ , Co 3+ , and S 2− , which are in accordance with the result of the XRD measurement.…”

Section: Resultssupporting

confidence: 86%

Zinc Cobalt Sulfide Microspheres as a High‐Performance Electrode Material for Supercapacitors

et al. 2018

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Fast charging/discharging rate, sustained cycle life, and high power density are irreplaceable virtues of supercapacitors (SCs), and these merits can be achieved by selecting suitable active materials and designing the rational microstructure. In this work, zinc cobalt sulfde (ZCS) microspheres have been synthesized by a simple two‐step method involving an ethylene glycol (EG) mediated solvothermal approach and subsequent sulfidation treatment. The formation mechanism of the microspheres is also proposed in detail by analyzing the time‐dependent SEM observations. Compared to ZCS nanosheets, ZCS microspheres achieve better electrochemical storage performance due to their satisfactory mesoporous feature, conductivity, and effective transport/diffusion paths for ions and electrons. When used as the electrode material of supercapacitor, ZCS microspheres not only obtain a large specific capacitance of 1516 F g−1 (211 mAh g−1) at 1 A g−1 with good rate capability of 1080 F g−1 (150 mAh g−1) at 10 A g−1, but also exhibit exceptional cycling stability with a capacitance reduced 6% of the initial specific capacitance at 10 A g−1 after 4000 cycles. An asymmetric supercapacitor using ZCS microspheres as the cathode and activated carbon (AC) as the anode is assembled, which achieves high specific capacitance (489.3 F g−1), energy density (152.9 Wh kg−1), and power density (750 W kg−1) at 1 A g−1 with the capacitance retention of 79% at 5 A g−1 after 2000 cycles. This work illustrates the promising application potential of the ZCS microspheres as the electrode material for electrochemical capacitors.

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Section: Resultssupporting

confidence: 86%

Zinc Cobalt Sulfide Microspheres as a High‐Performance Electrode Material for Supercapacitors

et al. 2018

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“…For example, NiCo 2 S 4 (NCS) synthesized with a hydrothermal method showed superior electrochemical activity and much higher conductivity compared with the corresponding mono-metal sulfides [32,33]. Different nanosized NCS materials including nanotubes, nanoprisms, microspheres and nanosheets have been successfully designed, displaying extraordinary electrochemical properties [34,35]. However, the NCS materials with MOFs polyhedrons are absent in the studies for the applications of electrodes in supercapacitors or battery energy storage devices [15,24,36].…”

Section: Introductionmentioning

confidence: 99%

Dual-functional NiCo2S4 polyhedral architecture with superior electrochemical performance for supercapacitors and lithium-ion batteries

et al. 2020

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“…The relatively small I D / I G ratio (<0.1) indicates that the prepared 3DG has few defects and high quality. The peak at 522 cm −1 , which is a characteristic of cobalt carbonate hydroxide hydrate or F 2g and A 1g Raman modes attributable to ZnCo 2 S 4 , and the peaks at 444 and 3250 cm −1 , which are characteristic peak of zinc carbonate hydroxide hydrate, indicate that ZnCo 2 (CO 3 ) 1.5 (OH) 3 @ZCS/3DG was successfully synthesized, consistent with the above structural analysis.…”

Section: Resultsmentioning

confidence: 99%

“…Pramanik et al. synthesized ZnCo 2 S 4 microflower arrays on NF, which significantly improved the capacitive performance (1282.5 C g −1 at 1 A g −1 ), and the capacitance retention was 85 % after 10 000 cycles . Thus, the introduction of effective conductive substrates and design of material structure are effective for improving the electrochemical properties of the electrode.…”

Section: Introductionmentioning

confidence: 84%

“…[4] Pramanik et al synthesized ZnCo 2 S 4 microflower arrays on NF,which significantly improved the capacitive performance (1282.5 Cg À1 at 1Ag À1 ), and the capacitance retention was 85 %a fter 10 000 cycles. [30] Thus, the introduction of effective conductive substrates and design of materials tructure are effectivef or improving the electrochemical properties of the electrode. As ac onductive substrate 3DG has outstanding specific surface area and conductivity,a nd it has attracted much attention in the field of energy storage.…”

Section: Introductionmentioning

confidence: 99%

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Zn–Co Sulfide Microflowers Anchored on Three‐Dimensional Graphene: A High‐Capacitance and Long‐Cycle‐Life Electrode for Asymmetric Supercapacitors

Deng

Tian

Wang

et al. 2019

Chemistry A European J

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Zinc-cobalt double-metal sulfides (ZCS) as Faradic electrode materials with high energy density have great potential fors upercapacitors, but their poor transfer efficiency for electrons and ions hinders their electrochemical response.H erein, ZnCo 2 (CO 3 ) 1.5 (OH) 3 @ZCS microflower hybrid arrays consisting of thin nanolayer petals were anchored on three-dimensional graphene (ZnCo 2 (CO 3 ) 1.5 (OH) 3 @ZCS/3DG) by as imple hydrothermal method and additional ion-exchangep rocess. AZ nCo 2 (CO 3 ) 1.5 (OH) 3 @ZCS/3DG electrode delivered high capacitance (2228 Fg À1 at 1Ag À1 )a nd long cycling life (85.7 %r etention after 17 000 cycles), which are ascribedt ot he multicomponents tructural design. The 3DGconductive substrate improves the electron-transfer dynamics of the electrode material. Meanwhile, the microflowers consisting of thin nanolayer petals could not only provide many actives ites for ions to improve thec apacitance, but also alleviate the volumee xpansion to ensure the structural stability. Furthermore,a na ll-solid-state asymmetric supercapacitor based on aZ nCo 2 (CO 3 ) 1.5 (OH) 3 @ZCS/3DG electrode achieved ah igh energy density of 27 Whkg À1 at 528.3 Wkg À1 ande xhibits exceptional cyclic stability for 23 000 cycles. Its ability to light ab lue LED for 9min verified the feasibility of its applicationf or energy storagedevices.[a] Q. Figure 3. a) XRD pattern of ZnCo 2 (CO 3 ) 1.5 (OH) 3 @ZCS powder,b)Raman spectrum of ZnCo 2 (CO 3 ) 1.5 (OH) 3 @ZCS/3DG,c )XPS full spectrum of ZnCo 2 (CO 3 ) 1.5 (OH) 3 @ZCS/3DG,d -f) Zn 2p, Co 2p, and S2 ph igh-resolution XPS spectra, respectively.

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High faradaic charge storage in ZnCo2S4 film on Ni-foam with a hetero-dimensional microstructure for hybrid supercapacitor

Cited by 69 publications

References 72 publications

Zinc Cobalt Sulfide Microspheres as a High‐Performance Electrode Material for Supercapacitors

Zinc Cobalt Sulfide Microspheres as a High‐Performance Electrode Material for Supercapacitors

Dual-functional NiCo2S4 polyhedral architecture with superior electrochemical performance for supercapacitors and lithium-ion batteries

Zn–Co Sulfide Microflowers Anchored on Three‐Dimensional Graphene: A High‐Capacitance and Long‐Cycle‐Life Electrode for Asymmetric Supercapacitors

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