In situ growth of NiCo2S4 nanotube arrays on Ni foam for supercapacitors: Maximizing utilization efficiency at high mass loading to achieve ultrahigh areal pseudocapacitance

Chen, Haichao; Jiang, Jianjun; Zhang, Li; Xia, Dandan; Zhao, Yuandong; Guo, Danqing; Qi, Tao; Wan, Houzhao

doi:10.1016/j.jpowsour.2013.12.092

Cited by 523 publications

(261 citation statements)

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“…Among these extrinsic pseudo-active materials, metal sulfides have recently emerged as a more promising class of active materials owing to an electronic conductivity greater than that of the corresponding metal oxides or hydroxides. 20,22 To further improve the utilization of metal sulfides, various nanostructures have been directly grown on three-dimensional porous current collectors to create high surface areas, short electron-and ion-transport pathways (which are required for high capacitance), 19,[23][24][25][26][27][28] and excellent rate capability and cycle performance. Xiao et al 19 reported on the preparation of highly conductive NiCo 2 S 4 crystalline nanotube arrays grown on carbon fiber papers using a hydrothermal process, thermal treatments and acid etching processes.…”

Section: Introductionmentioning

confidence: 99%

“…The as-synthesized NiCo 2 S 4 nanotube arrays showed a high areal capacitance of 0.87 F cm − 2 at 4 mA cm − 2 . Chen et al and Pu et al 25,26 prepared NiCo 2 S 4 nanotubes on nickel foam using a multistep hydrothermal method that converted the corresponding nickel cobalt carbonate hydroxide precursors via S 2 − ion exchange. Shen et al 18 reported a similar multistep route to growth of NiCo 2 S 4 nanotube arrays on nitrogen-doped carbon foams.…”

Section: Introductionmentioning

confidence: 99%

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One-step synthesis of architectural Ni3S2 nanosheet-on-nanorods array for use as high-performance electrodes for supercapacitors

et al. 2016

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Although a wide variety of three-dimensional porous electrode architectures have been created for supercapacitors to markedly enhance the charge and mass transfer associated with cycling, their low volumetric energy densities limit applications in many energy storage systems. In this work, we report a unique electrode architecture consisting of Ni 3 S 2 nanosheet-onto-Ni 3 S 2 -nanorods grown on nickel foam and prepared using a simple one-step hydrothermal method. When tested as an electrode for a supercapacitor (using a three-electrode configuration), this material exhibited excellent rate capability and cycling stability at high cycling rates. The obtainable capacitance decreased by o42% as the current density was increased from 20 to 240 mA cm − 2 , and the capacity retained 89.3% of its initial value after 5000 cycles at a cycling rate of 120 mA cm − 2 . Further, an asymmetric supercapacitor consisting of the Ni 3 S 2 nanosheet-onto-Ni 3 S 2 -nanorods electrode and an activated carbon (AC) electrode displayed a volumetric energy density as high as~1.96 mWh cm − 3 , with the potential to bridge the performance gap between thin-film Li batteries and commercial AC//AC supercapacitors. The outstanding electrochemical performance is attributed to the good mechanical adhesion and electrical connection with the substrate, high contact area with the electrolyte and alleviated structural pulverization during the ion insertion/desertion process. It is predicted that the architectural Ni 3 S 2 -nanosheet-on-nanorods array prepared with this facile method offers great potential promise in large-scale energy storage device applications. NPG Asia Materials (2016) 8, e300; doi:10.1038/am.2016.126; published online 26 August 2016 INTRODUCTIONThe demand for clean energy and emerging ecological concerns have greatly stimulated research on the development of new, low-cost and environmentally friendly energy conversion and storage systems. To this end, supercapacitors have attracted much interest in the past decades because they can supply high power density and long cycle life. However, a major shortcoming of the existing supercapacitors is their low energy density (typically 5-10 Wh kg − 1 ), which is significantly lower than that of lithium ion batteries (120-180 Wh kg − 1 ). [1][2][3][4] Higher energy density (E = 0.5 CV 2 ) can be achieved by increasing the cell voltage (V) and the specific or volumetric capacitance (C). [5][6][7] In general, the cell voltage and the specific capacitance are determined primarily by electrode properties, such as composition, structure, morphology, particle size and porosity, among others. 3 In addition to exploration of new electrode materials, much effort related to improved energy density of supercapacitors has been directed toward construction of novel architectures for full utilization of active electrode materials.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

One-step synthesis of architectural Ni3S2 nanosheet-on-nanorods array for use as high-performance electrodes for supercapacitors

et al. 2016

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“…[23][24][25][26] In addition, it has been well demonstrated that an outer protection layer is important to stabilize the nanostructured ultrathin hollow spheres. [27][28][29] In this sense, double-shell hollow structures of NiCo 2 O 4 with protection outer layer, large surface area, highly porous structure and desirable ionic permeability may be an excellent potential pseudocapacitive material.…”

Section: Introductionmentioning

confidence: 99%

Self-templating Scheme for the Synthesis of Nanostructured Transition-Metal Chalcogenide Electrodes for Capacitive Energy Storage

2015

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Due to their unique structural features including well-defined interior voids, low density, low coefficients of thermal expansion, large surface area and surface permeability, hollow micro/nanostructured transition metal sulfides with high conductivity have been investigated as new class of electrode materials for pseudocapacitor applications. Herein, we report a novel self-templating strategy to fabricate well-defined single and double-shell NiCo 2 S 4 hollow spheres, as a promising electrode material for pseudocapacitors. The surfaces of the NiCo 2 S 4 hollow spheres consist of self-assembled 2D mesoporous nanosheets. This unique morphology results in a high specific capacitance (1263 F g -1 at 2 A g -1 ), remarkable rate performance (75.3% retention of initial capacitance from 2 A g -1 to 60 A g -1 ) and exceptional reversibility with a cycling efficiency of 93.8% and 87% after 10,000 and 20,000 cycles, respectively, at a high current density of 10 A g -1 . The cycling stability of our ternary chalcogenides is comparable to carbonaceous electrode materials, but with much higher specific capacitance (higher than any previously reported ternary chalcogenide), suggesting that these unique chalcogenide structures have potential application in next-generation commercial pseudocapacitors.

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“…[25][26][27] In order to solve this problem, various forms of transition metal sul¯des having high speci¯c capacitance values have been explored over the last few decades. Up to now, various morphologies of Ni-Co sul¯des such as nanotubes, 28 nanowires, 29 nanosheets, 30 nanoprisms, 31 nanoparticles, 32 have been reported. For example, Lin et al reported that NiCo 2 S 4 nanosheet arrays were prepared via a facile two-step solvothermal approach on nickel foams, exhibiting a capacitance of 2051 FÁg À1 at a current density of 15 mAÁcm À2 in the three-electrode test.…”

Section: Introductionmentioning

confidence: 99%

Porous NiCo₂S₄ Networks as Electrodes for Electrochemical Supercapacitors

Qian

et al. 2016

NANO

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Porous NiCo 2 S 4 networks have been successfully synthesized by a facile one-pot solvothermal method without the use of any surfactant or template. Crystal structure, morphology, composition and surface area of the as-synthesized samples were characterized by X-ray di®raction, eld-emission scanning electron microscopy, X-ray photoelectron spectroscopy and BrunauerEmmet-Teller techniques. Owing to their porous nature and small crystalline size, the as-prepared NiCo 2 S 4 networks based supercapacitor electrodes showed a high speci¯c capacitance of 1250 FÁg À1 at 1 AÁg À1 , and excellent cycling stability with the retention capacity of 70.3% after 5000 cycles in the KOH aqueous solution electrolyte.

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In situ growth of NiCo2S4 nanotube arrays on Ni foam for supercapacitors: Maximizing utilization efficiency at high mass loading to achieve ultrahigh areal pseudocapacitance

Cited by 523 publications

References 47 publications

One-step synthesis of architectural Ni3S2 nanosheet-on-nanorods array for use as high-performance electrodes for supercapacitors

One-step synthesis of architectural Ni3S2 nanosheet-on-nanorods array for use as high-performance electrodes for supercapacitors

Self-templating Scheme for the Synthesis of Nanostructured Transition-Metal Chalcogenide Electrodes for Capacitive Energy Storage

Porous NiCo₂S₄ Networks as Electrodes for Electrochemical Supercapacitors

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In situ growth of NiCo2S4 nanotube arrays on Ni foam for supercapacitors: Maximizing utilization efficiency at high mass loading to achieve ultrahigh areal pseudocapacitance

Cited by 523 publications

References 47 publications

One-step synthesis of architectural Ni3S2 nanosheet-on-nanorods array for use as high-performance electrodes for supercapacitors

One-step synthesis of architectural Ni3S2 nanosheet-on-nanorods array for use as high-performance electrodes for supercapacitors

Self-templating Scheme for the Synthesis of Nanostructured Transition-Metal Chalcogenide Electrodes for Capacitive Energy Storage

Porous NiCo2S4 Networks as Electrodes for Electrochemical Supercapacitors

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Porous NiCo₂S₄ Networks as Electrodes for Electrochemical Supercapacitors