Construction of mass-controllable mesoporous NiCo<sub>2</sub>S<sub>4</sub> electrodes for high performance supercapacitors

Tao, Peng; Qian, Zhen; Wang, Jun; Song, Dalei; Liu, Jinyuan; Liu, Qi; Wang, Peng

doi:10.1039/c4ta04246h

Cited by 89 publications

(54 citation statements)

References 24 publications

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“…The two major peaks at 161.6 and 162.9 eV in the S 2p spectrum are doublet structures owing to spin‐orbit coupling (S 2p 3/2 and S 2p 1/2 ) in the binary metal sulfide . The near surface of the NiCo 2 S 4 @HGH sample has a composition of Ni 2+ , Ni 3+ , Co 2+ , Co 3+ , and S 2− , which is in good agreement with previous reports on NiCo 2 S 4 . Consequently, the above XPS analysis implies that NiCo 2 S 4 was successfully embedded in HGH.…”

Section: Resultssupporting

confidence: 91%

Synergistically Active NiCo₂S₄ Nanoparticles Coupled with Holey Defect Graphene Hydrogel for High‐Performance Solid‐State Supercapacitors

Tiruneh

Kang

Kwag

et al. 2018

Chemistry A European J

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Nickel cobalt sulfide nanoparticles embedded in holey defect graphene hydrogel (HGH) that exhibit highly porous structures and uniform nickel cobalt sulfide nanoparticle sizes are successfully prepared by a facile solvothermal-hydrothermal method. As an electrode material for supercapacitors, the as-prepared NiCo S @HGH shows ultra-high specific capacitances of 1000 F g and 800 F g at 0.5 and 6 A g , respectively, owing to the outstanding electrical conductivity of HGH and high specific capacitance of NiCo S . After 2100 charge/discharge cycles at a current density of 6 A g , 96.6 % of the specific capacitance was retained, signifying the superb durability of NiCo S @HGH. Moreover, remarkable specific capacitance (312.6 F g ) and capacity retention (87 % after 5000 cycles) at 6 A g were displayed by the symmetric solid-state supercapacitor fabricated by using NiCo S @HGH electrodes. These auspicious supercapacitor performances demonstrate that the as-developed solvothermal-hydrothermal approach can be widely used to prepare graphene-coupled binary metal sulfides for high-performance supercapacitor applications.

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Section: Resultssupporting

confidence: 91%

Synergistically Active NiCo₂S₄ Nanoparticles Coupled with Holey Defect Graphene Hydrogel for High‐Performance Solid‐State Supercapacitors

Tiruneh

Kang

Kwag

et al. 2018

Chemistry A European J

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“…In the initial cycles, the capacity of the device has a slight increase due to the activation of the electrode materials. 46 After that, the specific capacitance gradually reduced with an increase in the cycle number, and it is still capable of maintaining 90.9% of the initial capacitance after 2000 cycles, exhibiting a superior stability toward long time usages. Moreover, the interconnected nanosheet morphology and structure of the as-synthesized electroactive material is well-retained after 2000 cycles at 20 mA cm −2 as displayed in Figure S8 of the Supporting Information, which further substantiates the excellent cycling performance of NiCo 2 O 4 /NiO nanosheets on SiC nanowires.…”

Section: Acs Sustainable Chemistry and Engineeringmentioning

confidence: 97%

Direct Growth of Ultrathin NiCo₂O₄/NiO Nanosheets on SiC Nanowires as a Free-Standing Advanced Electrode for High-Performance Asymmetric Supercapacitors

Zhao

Zhang

et al. 2016

ACS Sustainable Chem. Eng.

113

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In this paper, we successfully employed SiC nanowires (SiC NWs) with splendid anticorrosion, antioxidation, heat-resistant properties, excellent conductivity, and large specific surface area directly deposited on carbon cloth (CC) as scaffolds to grow first the loose, porous and ultrathin NiCo 2 O 4 /NiO nanosheets (NiCo 2 O 4 /NiO NSs) via a facile hydrothermal technology coupled with annealing treatment to form a free-standing and stable hybrid electrode for asymmetric supercapacitor (ASC). Benefiting from the smart combination of SiC NWs and NiCo 2 O 4 /NiO NSs, illustrating a promising synergistic strategy, the electrode delivered an ultrahigh specific capacitance of 1801 F g −1 at 1 mA cm −2 as well as a remarkable rate capability of 1499 F g −1 at 10 mA cm −2 . Furthermore, the additive-free functionalized SiC NWs@NiCo 2 O 4 /NiO NSs on CC acted as the positive electrode, assembled with the activated carbon (AC) on nickel foam (NF) negative electrode to fabricate an advanced ASC with intriguing electrochemical performances in terms of huge energy density (60 Wh kg −1 at 1.66 kW kg −1 ) in addition to exceptional cycling stability (90.9% capacitance retention after 2000 cycles). This novel strategy can not only further widen the application of SiC NWs-based materials but also provide new insight into the development of next-generation supercapacitors with high energy/power densities. ■ INTRODUCTIONOwing to the restricted usability of fossil fuel and the increasingly urgent concern over ecological environment influence of traditional energy technologies, hunting for ecofriendly and reproducible advanced energy storage devices is one of the most stringent challenges facing us today. Recently, as an alternative to batteries and traditional electrostatic capacitors, supercapacitors (also called electrochemical capacitors) with irreplaceable performances of enhanced power density, fast charge−discharge rate (in seconds) and superior cycling stability, have raised widespread concerns about potential high-power applications such as heavy transport, hybrid electric vehicles and a number of microdevices. 1−4 However, supercapacitors possess relatively lower energy density compared with batteries, which seriously precludes their large-scale industrial utilizations in energy storage. 5 Thus, to meet the industrial demand, novel nanostructured electrode materials should be rationally designed and synthesized to boost the operating voltage and specific capacitances and improve the energy density for the development of supercapacitors.Among various supercapacitor electrode materials, nickel oxide (NiO) and spinel nickel cobaltite (NiCo 2 O 4 ) have recently been paid much attention due to their versatile merits, such as high theoretical capacitance, excellent redox property, favorable electrochemical activity, lower cost, high abundance and environmentally benign. 6−12 These intriguing advantages are beneficial to its application in high-performance supercapacitors. Nevertheless, previous attempts to fabricate NiO or NiCo...

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“…Stimulated by the remarkable electrochemical properties of NiCo2O4, spinel NiCo2S4 was explored for more striking electrochemical performance, which has become a new hotspot [8][9][10][11]. Replacing oxygen with sulphur may create a more flexible structure with the elongation of chemical bonds, thus making it easier for electrons to transport in this tuned structure, which can further contribute to the enhancement of electrochemical performances of SCs [12].…”

Section: Introductionmentioning

confidence: 98%

“…Besides, it is noted that the ion-exchange reaction could adjust the composition, structure and properties, taking a great effect on the purity and morphology of the NiCo2S4 [15,16] and it seems hard to obtain pure spinel NiCo2S4 by directly reacting Ni 2+ and Co 2+ with S 2-. Some sulphides such as Na2S [8,14,[17][18][19], thiourea [20,21] and thioacetamide [9,14] have been employed to prepared NiCo2S4 recently, and excellent electrochemical performance was demonstrated. Unfortunately, the route to obtain pure spinel NiCo2S4 material following these multiple steps, such as transforming from urea-prepared precursor to NiCo2S4 with Na2S, as reported very recently, is extremely difficult, and impuries of Co9S8, CoS, etc can generally be found in those sample [10,18,19,22,23].…”

Section: Introductionmentioning

confidence: 99%

High Energy Density Asymmetric Supercapacitors From Mesoporous NiCo2S4 Nanosheets

et al. 2015

Electrochimica Acta

258

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Construction of mass-controllable mesoporous NiCo₂S₄ electrodes for high performance supercapacitors

Abstract: Shape-preserved NiCo2S4 was obtained from NiCo2O4via a facile anion exchange reaction (AER). The unique electrode showed excellent performance, which makes it a promising electrode for supercapacitors.

Cited by 89 publications

References 24 publications

Synergistically Active NiCo₂S₄ Nanoparticles Coupled with Holey Defect Graphene Hydrogel for High‐Performance Solid‐State Supercapacitors

Synergistically Active NiCo₂S₄ Nanoparticles Coupled with Holey Defect Graphene Hydrogel for High‐Performance Solid‐State Supercapacitors

Direct Growth of Ultrathin NiCo₂O₄/NiO Nanosheets on SiC Nanowires as a Free-Standing Advanced Electrode for High-Performance Asymmetric Supercapacitors

High Energy Density Asymmetric Supercapacitors From Mesoporous NiCo2S4 Nanosheets

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Construction of mass-controllable mesoporous NiCo2S4 electrodes for high performance supercapacitors

Abstract: Shape-preserved NiCo2S4 was obtained from NiCo2O4via a facile anion exchange reaction (AER). The unique electrode showed excellent performance, which makes it a promising electrode for supercapacitors.

Cited by 89 publications

References 24 publications

Synergistically Active NiCo2S4 Nanoparticles Coupled with Holey Defect Graphene Hydrogel for High‐Performance Solid‐State Supercapacitors

Synergistically Active NiCo2S4 Nanoparticles Coupled with Holey Defect Graphene Hydrogel for High‐Performance Solid‐State Supercapacitors

Direct Growth of Ultrathin NiCo2O4/NiO Nanosheets on SiC Nanowires as a Free-Standing Advanced Electrode for High-Performance Asymmetric Supercapacitors

High Energy Density Asymmetric Supercapacitors From Mesoporous NiCo2S4 Nanosheets

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Construction of mass-controllable mesoporous NiCo₂S₄ electrodes for high performance supercapacitors

Synergistically Active NiCo₂S₄ Nanoparticles Coupled with Holey Defect Graphene Hydrogel for High‐Performance Solid‐State Supercapacitors

Synergistically Active NiCo₂S₄ Nanoparticles Coupled with Holey Defect Graphene Hydrogel for High‐Performance Solid‐State Supercapacitors

Direct Growth of Ultrathin NiCo₂O₄/NiO Nanosheets on SiC Nanowires as a Free-Standing Advanced Electrode for High-Performance Asymmetric Supercapacitors