CNT/Co3S4@NiCo LDH ternary nanocomposites as battery-type electrode materials for hybrid supercapacitors

Wei, Dandan; Zhang, Youliang; Zhu, Xuezhen; Fan, Mingli; Wang, Yinling

doi:10.1016/j.jallcom.2020.153937

Cited by 63 publications

(23 citation statements)

References 44 publications

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“…32 Similarly, the lattice fringes in Figure 4d were evaluated as 0.26 and 0.23 nm for the (012) and (110) crystal planes, respectively, indicating the hydrotalcite-like LDH phase of the Co−Ni-LDH nanosheet. 37,27 These results were perfectly sufficient to match with the XRD results. The SAED pattern of a ZNCO@Co−Ni-LDH (inset in Figure 4b) from the magnified region as marked by the red box displayed the well-defined bright diffraction ring spots, indicating the polycrystalline nature of the ZNCO@Co−Ni-LDH sample.…”

Section: ■ Results and Discussionsupporting

confidence: 70%

Engineering the Hierarchical Heterostructures of Zn–Ni–Co Nanoneedles Arrays@Co–Ni-LDH Nanosheets Core–Sheath Electrodes for a Hybrid Asymmetric Supercapacitor with High Energy Density and Excellent Cyclic Stability

Acharya

Seo

et al. 2020

ACS Appl. Energy Mater.

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To meet the requirement for the high-ranked positive electrode materials having auspicious pseudocapacitive features for potential application in energy storage devices, the suitable designs of unique core−shell heterostructures featuring mixed transition metal oxide and layered double hydroxide (LDH) are highly needed and have been progressing expeditiously in recent years. Herein, 3D hierarchical zinc−nickel−cobalt (ZNCO)@Co−Ni-LDH (LDH-1 and LDH-2) core−shell nanostructured arrays on Ni foam as a pseudocapacitive electrode are prepared by using a facile hydrothermal and metal−organic framework (MOF) assisted coprecipitation method. FE-SEM images show that the core 1D ZNCO and shell 2D Co−Ni-LDH are well interconnected to form 3D porous and hierarchical ZNCO@Co−Ni-LDH core−shell nanostructures, leading to the fast and efficient transmission/transfer of both electrolyte ions and electrons, due to the higher electroactive surface areas and enhanced electrical conductivity. In a three-electrode system, the ZNCO@Co−Ni-LDH-2 electrode material delivers excellent electrochemical performance with higher specific capacitance of 2866 F g −1 at 1 A g −1 with ultrahigh capacitance retention of 68.35% at a higher current density of 10 A g −1 and excellent life span of 89% capacitance retention after 8000 cycles. Moreover, the sandwiched asymmetric supercapacitor (ASC) device using ZNCO@Co−Ni-LDH-2 as the positive electrode and N-doped graphene hydrogel (NGH) as the negative electrode exhibits superior specific capacitance (178 F g −1 at 1 A g −1 ), outstanding rate capability (70.22% at 10 A g −1 ), excellent life span (91.2% after 8000 cycles at 10 A g −1 ), and very high energy density (63.28 W h kg −1 at power density of 796.53 W kg −1 ).

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Section: ■ Results and Discussionsupporting

confidence: 70%

Engineering the Hierarchical Heterostructures of Zn–Ni–Co Nanoneedles Arrays@Co–Ni-LDH Nanosheets Core–Sheath Electrodes for a Hybrid Asymmetric Supercapacitor with High Energy Density and Excellent Cyclic Stability

Acharya

Seo

et al. 2020

ACS Appl. Energy Mater.

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“…A study by Wei et al employed CNT/Co 3 S 4 @NiCo layered double hydroxide (LDH) ternary nanocomposites as the active material in a battery-type hybrid cell which possessed a SC of 774 Fg −1 at a current density of 1 Ag −1 . This cell structure was also able to achieve an energy density of 60 Wh kg −1 at a power density of 1507 W kg -1 [36].…”

Section: Hybrid-capacitors (Hcs)mentioning

confidence: 98%

Current State and Future Prospects for Electrochemical Energy Storage and Conversion Systems

et al. 2020

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Electrochemical energy storage and conversion systems such as electrochemical capacitors, batteries and fuel cells are considered as the most important technologies proposing environmentally friendly and sustainable solutions to address rapidly growing global energy demands and environmental concerns. Their commercial applications individually or in combination of two or more devices are based on their distinguishing properties e.g., energy/power densities, cyclability and efficiencies. In this review article, we have discussed some of the major electrochemical energy storage and conversion systems and encapsulated their technological advancement in recent years. Fundamental working principles and material compositions of various components such as electrodes and electrolytes have also been discussed. Furthermore, future challenges and perspectives for the applications of these technologies are discussed.

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“…The specific capacitance is calculated from the GCD curves according to the following equations [39,40]:…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Hierarchical Ni2P@Ni(OH)2 architectures supported on carbon cloth as battery-type electrodes for hybrid supercapacitors with boosting specific capacitance and cycle stability

Lan

Xing

Zong

et al. 2021

J Mater Sci: Mater Electron

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In this work, a novel binder-free electrode, in which three-dimensional porous Ni2P@Ni(OH)2 nanosheet arrays were in-situ grown on carbon cloth (CC), is rationally designed for supercapacitor applications. In comparison with Ni2P@CC, the Ni2P@Ni(OH)2@CC electrode represents superior electrochemical characteristics: the gravimetric capacitance and areal capacitance are boosted to be 632 C g -1 and 0.73 C cm -2 at 1 mA cm -2 , about 2 and 2.7 times larger than those of Ni2P@CC (321 C g -1 and 0.27 C cm -2 ), respectively; the rate capability is improved to be 63.3% from 1 to 2 10 mA cm -2 , about 1.5 times larger than Ni2P@CC (42.9%); the cycle stability is enhanced to be 81.4% after cycles, about 1.6 times larger than Ni2P/CC (51.8%).The assembly Ni2P@Ni(OH)2@CC//AC hybrid supercapacitor device shows high energy density of 23.5 Wh kg -1 at a power density of 1158.0 W kg -1 and good cycling stability of 75.2% maintenance after 5000 cycles. Benefiting from the combined advantages of high electronic conductivity and large specific capacitance of Ni2P, superior anion exchanging/intercalating capacity of Ni(OH)2, excellent flexibility of carbon cloth and special hierarchical architecture with large surface area, the Ni2P@Ni(OH)2@CC electrode is promised to be a good candidate for supercapacitors.

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CNT/Co3S4@NiCo LDH ternary nanocomposites as battery-type electrode materials for hybrid supercapacitors

Cited by 63 publications

References 44 publications

Engineering the Hierarchical Heterostructures of Zn–Ni–Co Nanoneedles Arrays@Co–Ni-LDH Nanosheets Core–Sheath Electrodes for a Hybrid Asymmetric Supercapacitor with High Energy Density and Excellent Cyclic Stability

Engineering the Hierarchical Heterostructures of Zn–Ni–Co Nanoneedles Arrays@Co–Ni-LDH Nanosheets Core–Sheath Electrodes for a Hybrid Asymmetric Supercapacitor with High Energy Density and Excellent Cyclic Stability

Current State and Future Prospects for Electrochemical Energy Storage and Conversion Systems

Hierarchical Ni2P@Ni(OH)2 architectures supported on carbon cloth as battery-type electrodes for hybrid supercapacitors with boosting specific capacitance and cycle stability

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