Epitaxial grown self-supporting NiSe/Ni3S2/Ni12P5 vertical nanofiber arrays on Ni foam for high performance supercapacitor: Matched exposed facets and re-distribution of electron density

Tao, Katsumi; Gong, Yun; Lin, Jianhua

doi:10.1016/j.nanoen.2018.10.060

Cited by 107 publications

(56 citation statements)

References 48 publications

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“…However, most commercialized SCs are symmetrical electrical double layer capacitors (EDLCs) of activated carbon (AC) as active materials, and their low energy density limits further applications . Recently, the battery‐type materials (NiO, NiCoP, Ni 3 Se 2 , etc) have received much more attention as the Faradaic charge storage and the diffusion‐controlled nano‐intercalation could obtain greater charge storage capacity . However, the areal mass loading of active materials in most literatures is generally limited within 3 mg cm −2 , resulting in a low areal capacity .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is very important to improve the areal capacity by solving the problems between areal loading and conductivity. The simpliest way is to grow active material directly on conductive substrate (nickel foam, carbon cloth, copper foam, etc) to serve as an integrated electrode . As their high theoretical capacity and controllable layered structures, layered double hydroxides (LDHs) are chosen as one kind of promising battery‐type active materials to grow for high capacity .…”

Section: Introductionmentioning

confidence: 99%

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2‐nm‐Thick NiCo LDH@NiSe Single‐Crystal Nanorods Grown on Ni Foam as Integrated Electrode with Enhanced Areal Capacity for Supercapacitors

Zhai

et al. 2020

Batteries & Supercaps

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It remains a great challenge to simultaneously guarantee the conductivity and high areal loading of active materials for integrated electrode of supercapacitors. Herein, we designed a hierarchical structure with cores of NiSe single‐crystal nanorods and sheaths of 2‐nm‐thick NiCo thin sheets grown on nickel foam (NiCo LDH@NiSe/NF) as integrated electrode. It reaches a high areal capacity of 1131 μAh cm−2 at a current density of 5 mA cm−2, which is 2.2 times of NiSe/NF (522 μAh cm−2) and 6.0 times of NiCo LDH/NF (189 μAh cm−2), superior to most reported integrated electrodes. The enhanced areal capacity can be ascribed to the high active material loading of 6.5 mg cm−2 (twice more than other reported values) and considerable conductivity of single‐crystal NiSe nanorods of 2630 S cm−1. The fabricated hierarchical integrated electrode of NiCo LDH@NiSe/NF assembled with activated carbon shows a maximum energy density of 0.454 mWh cm−2 and a maximum power density of 80 mW cm−2. This work presents supports of single‐crystal nanorods for thin LDH sheets to fabricate high‐density hierarchical structure for integrated electrode, which improves the conductivity and structural stability of active materials especially the LDHs, resulting in excellent electrochemical performance. It offers a promising approach to engineer and fabricate advanced supercapacitors with enhanced areal capacity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

2‐nm‐Thick NiCo LDH@NiSe Single‐Crystal Nanorods Grown on Ni Foam as Integrated Electrode with Enhanced Areal Capacity for Supercapacitors

Zhai

et al. 2020

Batteries & Supercaps

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“…Alternatively, it has been demonstrated that the direct growth of the active materials onto 3D substrate with good conductivity can improve the electrochemical performance due to the tight connection at the interface . Specifically, well‐regulated nanostructures not only improve the utilization of active materials, but also shorten the diffusion path of ions, thereby promoting the reaction kinetics of the electrodes and improving electrochemical performance . For example, Qin et al synthesized MoS 2 /NiS egg yolk‐shell microsphere structure, the specific capacitance at a current density of 0.2 A g −1 is 1493 F g −1 .…”

Section: Introductionmentioning

confidence: 99%

Hierarchical NiS@CoS with Controllable Core‐Shell Structure by Two‐Step Strategy for Supercapacitor Electrodes

Miao

Zhang

Zhan

et al. 2019

Adv Materials Inter

110

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Constructing hierarchical core‐shell configuration from well‐known metal sulfides is one way to further tune and utilize unique species. Herein, a novel core‐shell structure is developed based on CoS deposited on NiS nanosheets, which involves hydrothermal and electrodeposition method. The micromorphology of the composite electrode can be optimized by adjusting the cycles of electrodeposition. Taking advantages of the highly conductive, open framework of the core‐shell nanolayer, the 5‐NiS@CoS electrode shows a specific capacitance of 1210 F g−1 at a current density of 1 A g−1 (retaining 82% from 1 to 10 A g−1, while NiS substrate is only 39%). The specific capacitance retention rate is 80.94% at 10 A g−1 after 2000 cycles (NiS substrate is 59.6%). Moreover, NiS@CoS//AC asymmetric supercapacitor device delivers an energy density of 24.1 Wh kg−1 at a power density of 752.15 W kg−1 and remarkable stability (over 80% retention after 5000 cycles). This work may prompt the exploration of the synthesis of inexpensive compounds incorporating highly reactive components for supercapacitors.

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“…Indeed, some metal nitrides [24] and sulfides [25] have been reported as new electroactive materials for SCs and often show better performance than oxides. [32][33][34][35][36][37][38][39][40][41][42] In their reports, the presence of selenium atom greatly enhanced electrochemical active sites. [32] Recent reports highlight that metal selenides might be effective electrode material for SCs.…”

mentioning

confidence: 99%

“…Besides, metal selenides, as an important class of metal chalcogenides, possess high electrical conductivity and widely employed as electrocatalysts, [26][27][28][29] dye-sensitized solar cells (DSSCs), [30,31] and SCs. [32][33][34][35][36][37][38][39][40][41][42] In their reports, the presence of selenium atom greatly enhanced electrochemical active sites. [32][33][34][35][36][37][38][39][40][41][42] In their reports, the presence of selenium atom greatly enhanced electrochemical active sites.…”

mentioning

confidence: 99%

Selective Growth of Zn–Co–Se Nanostructures on Various Conductive Substrates for Asymmetric Flexible Hybrid Supercapacitor with Enhanced Performance

Chebrolu

Balakrishnan

Chinnadurai

et al. 2019

Adv Materials Technologies

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laptops, rollup displays, and wearable devices. [1][2][3][4][5][6][7][8][9][10] Though, several kinds of renewable energy sources have attracted great attention including, rechargeable batteries, supercapacitors (SCs), and fuel cells. Among them, SCs hold great promise for fast charging, [11] while batteries take hours to recharge. [12] SCs have witnessed broad application prospects such as those in cameras, electric vehicles (EVs), railways, and aerospace due to their superior power density, tiny volume, and lifespan, [13,14] but small specific capacitance and low operating voltage critically fulfill the demands for EVs with high energy density. Therefore, researchers are driving toward in creating new kinds of electrode material with high specific capacity, or the operation potential window (V), and the electrochemical performance in SCs is significantly dependent on the physicochemical properties of electrode materials. [15] Nanostructured transitionmetal oxides [16][17][18][19][20] and conducting polymers are widely exploited as a positive electrode material for SCs because of their unique multiple oxidation states of transition metal ions, reversible faradic reactions, and high specific capacitance properties compared to that of carbonaceous materials (e.g., graphite, activated carbon). [21][22][23] Nevertheless, the power density, low electronic conductivity, and poor cycling stability arising from the metal oxide/polymers limit their wide application for SCs.Recently, battery-type metal selenides, phosphates, and nitrides have been attracted enormous attention, being developed as a new type of electroactive materials in the field of energy storage and conversion systems due to its low electronegativity and rich redox reactions when compared to the corresponding oxides. Indeed, some metal nitrides [24] and sulfides [25] have been reported as new electroactive materials for SCs and often show better performance than oxides. Besides, metal selenides, as an important class of metal chalcogenides, possess high electrical conductivity and widely employed as electrocatalysts, [26][27][28][29] dye-sensitized solar cells (DSSCs), [30,31] and SCs. [32] Recent reports highlight that metal selenides might be effective electrode material for SCs. [32][33][34][35][36][37][38][39][40][41][42] In their reports, the presence of selenium atom greatly enhanced electrochemical active sites. In another point of view, the cation substituted in transition metals Hybrid supercapacitors have received great interest in the field of electric vehicles and wearable electronic devices. However, developing new electrode material with high capacity and supporting substrates with good stability is still a big challenge. Herein, a facile electrodeposition technique is applied to grow Zn-Co-Se on various conductive substrates for hybrid supercapacitor. Among all, NF-supported Zn-Co-Se electrode shows a high specific capacitance of 313.45 C g −1 and good cyclical stability of 95% retention over 3000 cycles. Interestingly, the assembled hybri...

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Epitaxial grown self-supporting NiSe/Ni3S2/Ni12P5 vertical nanofiber arrays on Ni foam for high performance supercapacitor: Matched exposed facets and re-distribution of electron density

Cited by 107 publications

References 48 publications

2‐nm‐Thick NiCo LDH@NiSe Single‐Crystal Nanorods Grown on Ni Foam as Integrated Electrode with Enhanced Areal Capacity for Supercapacitors

2‐nm‐Thick NiCo LDH@NiSe Single‐Crystal Nanorods Grown on Ni Foam as Integrated Electrode with Enhanced Areal Capacity for Supercapacitors

Hierarchical NiS@CoS with Controllable Core‐Shell Structure by Two‐Step Strategy for Supercapacitor Electrodes

Selective Growth of Zn–Co–Se Nanostructures on Various Conductive Substrates for Asymmetric Flexible Hybrid Supercapacitor with Enhanced Performance

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