Construction of core-shell cobalt sulfide/manganese molybdate nanostructure on reduced graphene oxide/Ni foam as an advanced electrode for high-performance asymmetric supercapacitor

Li, Hongsheng; Xuan, Haicheng; Gao, Jinhong; Tao, Liang; Han, Xiaokun; Guan, Yayu; Yang, Jing; Han, Peide; Du, Youwei

doi:10.1016/j.electacta.2019.05.008

Cited by 25 publications

(4 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The maximum power density of the device reached 729 W (∼7 kW kg –1 ) when the energy density value was 0.068 Wh (43.5 Wh kg –1 ). The variation of energy density with power density is shown in the Ragone plot of Figure b. − where the symbols refer to the inner meanings.…”

Section: Resultsmentioning

confidence: 99%

Enhancement of the Electrochemical Performance of a Novel Binder-Free Ni₃S₂@Co₃S₄/Mn₃O₄-RGO Heterostructure through Crystallinity and Band Gap Modification for Flexible Supercapacitors

et al. 2021

View full text Add to dashboard Cite

A freestanding binder-free novel electrode material, a Ni 3 S 2 @Co 3 S 4 /Mn 3 O 4 -RGO (CSMRGN) composite, was synthesized for flexible solid-state asymmetric supercapacitors (FSSASCs) through a multistep hydrothermal route. The more electronegative sulfur atoms were arranged regularly to form the land-lotus flower-like structure that enhanced the electrical conductivity and reacted with a nickel foam substrate to form Ni 3 S 2 . After the interrogation of Mn 3 O 4 , the crystallinity of the Co 3 S 4 particles increased with decreasing band gap, which resulted in the improvement of electrochemical properties. The flexible CSMRGN electrode exhibited a high specific capacitance of ∼3140 F g −1 at 2 A g −1 . The (TRGO//CSMRGN) FSSASC device demonstrated a high energy density of ∼51.6 Wh kg −1 at a power density of 1400 W kg −1 . The asymmetric device retained ∼43.5 Wh kg −1 (∼84.5%) energy density even at a high power density of 7 kW kg −1 . The capacitive properties and charge transfer resistance of the FSSASC device were calculated at different bending angles. In comparison to the kinetic controlled process, the diffusion-controlled specific capacitance decreased significantly when the bending angle of the device increased. The device retained ∼96 and 83% of initial capacitance after 1000 GCD cycles under normal and 90°b ending conditions, respectively.

show abstract

Section: Resultsmentioning

confidence: 99%

Enhancement of the Electrochemical Performance of a Novel Binder-Free Ni₃S₂@Co₃S₄/Mn₃O₄-RGO Heterostructure through Crystallinity and Band Gap Modification for Flexible Supercapacitors

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Nevertheless, inadequate contact with the collector and limited electron conductivity, resulting in minimal specific capacitance and poor stability is always observed with MnMoO 4 . Several approaches have been developed to improve the specific capacitance of MnMoO 4 , such as (i) the introduction of carbon, (ii) the combination of bimetallic oxides (MnMoO 4 /CoMoO 4 ), (iii) the introduction of Au as a carrier, and (iv) the inclusion of heterostructures (CoS/MnMoO 4 ) . It is well-known that combining different metal molybdates or sulfides can achieve higher specific capacitance due to the synergistic effect of the multicomponent and sufficiently promote the electrochemical activity by optimizing the electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

“…Several approaches have been developed to improve the specific capacitance of MnMoO 4 , such as (i) the introduction of carbon, 28 (ii) the combination of bimetallic oxides (MnMoO 4 /CoMoO 4 ), 29 (iii) the introduction of Au as a carrier, and (iv) the inclusion of heterostructures (CoS/MnMoO 4 ). 30 It is well-known that combining different metal molybdates or sulfides can achieve higher specific capacitance due to the synergistic effect of the multicomponent and sufficiently promote the electrochemical activity by optimizing the electrical conductivity. For example, Mai et al demonstrated the hydrothermal synthesis of hierarchical structures of MnMoO 4 /CoMoO 4 nanowires and used them as SCs electrodes with a specific capacitance of 187 F g −1 at 1 A g −1 by targeting a high surface/body ratios.…”

Section: ■ Introductionmentioning

confidence: 99%

Development of an Amorphous Nickel Boride/Manganese Molybdate Heterostructure as an Efficient Electrode Material for a High-Performance Asymmetric Supercapacitor

Karthik

Sukanya

Chen

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

The exploration of heterostructure materials with unique electronic properties is considered a desirable platform for fabricating electrode/surface interface relationships for constructing asymmetric supercapacitors (ASCs) with high energy density. In this work, a heterostructure based on amorphous nickel boride (Ni X B) and crystalline square bar-like manganese molybdate (MnMoO4) was prepared by a simple synthesis strategy. The formation of the Ni X B/MnMoO4 hybrid was confirmed by powder X-ray diffraction (p-XRD), field emission scanning electron microscopy (FE-SEM), field-emission transmission electron microscopy (FE-TEM), Brunauer–Emmett–Teller (BET), Raman, and X-ray photoelectron spectroscopy (XPS). In this hybrid system (Ni X B/MnMoO4), the intact combination of Ni X B and MnMoO4 leads to a large surface area with open porous channels and abundant crystalline/amorphous interfaces with a tunable electronic structure. This Ni X B/MnMoO4 hybrid shows high specific capacitance (587.4 F g–1) at 1 A g–1, and it even retains a capacitance of 442.2 F g–1 at 10 A g–1, indicating superior electrochemical performance. The fabricated Ni X B/MnMoO4 hybrid electrode also exhibited an excellent capacity retention of 124.4% (10000 cycles) and a Coulombic efficiency of 99.8% at a current density of 10 A g–1. In addition, the ASC device (Ni X B/MnMoO4//activated carbon) achieved a specific capacitance of 104 F g–1 at 1 A g–1 and delivered a high energy density of 32.5 Wh.kg–1 with a power density of 750 W·kg–1. This exceptional electrochemical behavior is due to the ordered porous architecture and the strong synergistic effect of Ni X B and MnMoO4, which enhances the accessibility and adsorption of OH– ions that improve electron transport. Moreover, the Ni X B/MnMoO4//AC device exhibits excellent cyclic stability with a retention of 83.4% of the original capacitance after 10000 cycles, which is due to the heterojunction layer between Ni X B and MnMoO4 that can improve the surface wettability without causing structural changes. Our results show that the metal boride/molybdate-based heterostructure is a new category of high-performance and promising material for the growth of advanced energy storage devices.

show abstract

“…Li et al . provided core‐shell cobalt sulfide/manganese molybdate nanostructure on reduced graphene oxide/Ni foam as an advanced electrode for high‐performance asymmetric SCs with a remarkable specific capacitance of 3074.5 F g −1 (1 A g −1 ) and a good cycling performance of 87% through 5000 cycles [42] …”

Section: Introductionmentioning

confidence: 99%

Enhanced Supercapacitor Performance Using a Co₃O₄@Co₃S₄ Nanocomposite on Reduced Graphene Oxide/Ni Foam Electrodes

Ansarinejad

Shabani-Nooshabadi

Ghoreishi

2021

Chemistry An Asian Journal

View full text Add to dashboard Cite

To avoid an enormous energy crisis in the not‐too‐distant future, it be emergent to establish high‐performance energy storage devices such as supercapacitors. For this purpose, a three‐dimensional (3D) heterostructure of Co3O4 and Co3S4 on nickel foam (NF) that is covered by reduced graphene oxide (rGO) has been prepared by following a facile multistep method. At first, rGO nanosheets are deposited on NF under mild hydrothermal conditions to increase the surface area. Subsequently, nanowalls of cobalt oxide are electro‐deposited on rGO/Ni foam by applying cyclic‐voltammetry (CV) under optimized conditions. Finally, for the synthesis of Co3O4@Co3S4 nanocomposite, the nanostructure of Co3S4 was fabricated from Co3O4 nanowalls on rGO/NF by following an ordinary hydrothermal process through the sulfurization for the electrochemical application. The samples are characterized by using X‐ray diffraction (XRD) and scanning electron microscopy (SEM). The obtained sample delivers a high capacitance of 13.34 F cm−2 (5651.24 F g−1) at a current density of 6 mA cm−2 compared to the Co3O4/rGO/NF electrode with a capacitance of 3.06 F cm−2 (1230.77 F g−1) at the same current density. The proposed electrode illustrates the superior electrochemical performance such as excellent specific energy density of 85.68 W h Kg−1, specific power density of 6048.03 W kg−1 and a superior cycling performance (86% after 1000 charge/discharge cycles at a scan rate of 5 mV s−1). Finally, by using Co3O4 @Co3S4/rGO/NF and the activated carbon‐based electrode as positive and negative electrodes, respectively, an asymmetric supercapacitor (ASC) device was assembled. The fabricated ASC provides an appropriate specific capacitance of 79.15 mF cm−2 at the applied current density of 1 mA cm−2, and delivered an energy density of 0.143 Wh kg−1 at the power density of 5.42 W kg−1.

show abstract

Construction of core-shell cobalt sulfide/manganese molybdate nanostructure on reduced graphene oxide/Ni foam as an advanced electrode for high-performance asymmetric supercapacitor

Cited by 25 publications

References 59 publications

Enhancement of the Electrochemical Performance of a Novel Binder-Free Ni₃S₂@Co₃S₄/Mn₃O₄-RGO Heterostructure through Crystallinity and Band Gap Modification for Flexible Supercapacitors

Enhancement of the Electrochemical Performance of a Novel Binder-Free Ni₃S₂@Co₃S₄/Mn₃O₄-RGO Heterostructure through Crystallinity and Band Gap Modification for Flexible Supercapacitors

Development of an Amorphous Nickel Boride/Manganese Molybdate Heterostructure as an Efficient Electrode Material for a High-Performance Asymmetric Supercapacitor

Enhanced Supercapacitor Performance Using a Co₃O₄@Co₃S₄ Nanocomposite on Reduced Graphene Oxide/Ni Foam Electrodes

Contact Info

Product

Resources

About

Construction of core-shell cobalt sulfide/manganese molybdate nanostructure on reduced graphene oxide/Ni foam as an advanced electrode for high-performance asymmetric supercapacitor

Cited by 25 publications

References 59 publications

Enhancement of the Electrochemical Performance of a Novel Binder-Free Ni3S2@Co3S4/Mn3O4-RGO Heterostructure through Crystallinity and Band Gap Modification for Flexible Supercapacitors

Enhancement of the Electrochemical Performance of a Novel Binder-Free Ni3S2@Co3S4/Mn3O4-RGO Heterostructure through Crystallinity and Band Gap Modification for Flexible Supercapacitors

Development of an Amorphous Nickel Boride/Manganese Molybdate Heterostructure as an Efficient Electrode Material for a High-Performance Asymmetric Supercapacitor

Enhanced Supercapacitor Performance Using a Co3O4@Co3S4 Nanocomposite on Reduced Graphene Oxide/Ni Foam Electrodes

Contact Info

Product

Resources

About

Enhancement of the Electrochemical Performance of a Novel Binder-Free Ni₃S₂@Co₃S₄/Mn₃O₄-RGO Heterostructure through Crystallinity and Band Gap Modification for Flexible Supercapacitors

Enhancement of the Electrochemical Performance of a Novel Binder-Free Ni₃S₂@Co₃S₄/Mn₃O₄-RGO Heterostructure through Crystallinity and Band Gap Modification for Flexible Supercapacitors

Enhanced Supercapacitor Performance Using a Co₃O₄@Co₃S₄ Nanocomposite on Reduced Graphene Oxide/Ni Foam Electrodes