Improving supercapacitive performance of CNTs/NiCo2S4 composites by interface regulation

Bi, Tiantian; Jiang, Jinlong; Lei, Yu; Zheng, Xuan; Jia, Zhengfeng; Wei, Zhiqiang; Yang, Hua

doi:10.1016/j.apsusc.2020.147317

Cited by 32 publications

(16 citation statements)

References 46 publications

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“…Nevertheless, many researchers reported poor cycling stability and much lower specific capacitance of NCSs than their theoretical capacitance. ,, Many strategies have been tried to address this issue. For example, combining NCSs with carbonaceous materials like graphene, porous carbons, carbon nanotubes (CNTs), and carbon nanofibers to form composites has proven to be an effective strategy to solve the problem as the obtained composites could exhibit enhanced electrical conductivity and faster charge transfer rate. Among these carbonaceous materials, graphene has been regarded as one of the most promising materials due to its excellent conductivity, large surface area, long-term stability, and great processing flexibility. , Many research results have demonstrated that the combination of NCSs and graphene could show enhanced electrochemical performance due to the synergistic effect.…”

Section: Introductionmentioning

confidence: 99%

“…9,10,36 Many strategies have been tried to address this issue. For example, combining NCSs with carbonaceous materials like graphene, 37 porous carbons, 38 carbon nanotubes (CNTs), 39 and carbon nanofibers 40 to form composites has proven to be an effective strategy to solve the problem as the obtained composites could exhibit enhanced electrical conductivity and faster charge transfer rate. Among these carbonaceous materials, graphene has been regarded as one of the most promising materials due to its excellent conductivity, large surface area, long-term stability, and great processing flexibility.…”

Section: ■ Introductionmentioning

confidence: 99%

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Ultrafast Microwave Synthesis of Nickel-Cobalt Sulfide/Graphene Hybrid Electrodes for High-Performance Asymmetrical Supercapacitors

Zhang

Wei

et al. 2021

ACS Appl. Energy Mater.

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Nickel-cobalt sulfides (NCSs) with rich redox-active sites and remarkable theoretical capacitance have been regarded as promising electrode materials for supercapacitors. Various approaches have been developed for the synthesis of NCSs-based electrode materials. However, most of these methods require complex steps, high energy consumption, and time-consuming processes, which result in high cost, chemical contamination, and safety problems. Herein, we demonstrated a one-step ultrafast microwave approach for the successful preparation of NCS/graphene composite in 1 min. The prepared NCS/graphene composite can be used as a high-performance supercapacitor electrode with a high specific capacitance of 710 F g–1 at a current density of 0.5 A g–1 and a prominent cycling stability of 75% capacitance retention after 10 000 cycles. In addition, a high-performance asymmetric supercapacitor (ASC) was assembled using NCS/graphene composite as a positive electrode and activated carbon as a negative electrode. The fabricated ASC can deliver a high energy density of 30.29 Wh kg–1 at a power density of 400 W kg–1 and exhibit excellent cycling stability with a capacitance retention of 112% after 10 000 cycles. These impressive results demonstrated that microwave synthesis can be used as a highly efficient and ultrafast approach for the preparation of high-performance NCSs-based electrode materials.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Ultrafast Microwave Synthesis of Nickel-Cobalt Sulfide/Graphene Hybrid Electrodes for High-Performance Asymmetrical Supercapacitors

Zhang

Wei

et al. 2021

ACS Appl. Energy Mater.

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“…Unfortunately, the role of the interface between two components was rarely mentioned in previous studies. The strong bonding interface can not only enhance the mechanical stability but also significantly increases the conducting properties of the composites, − therefore achieving efficient coupling among different active components of the electrode . Actually, the importance of the interface goes far beyond that.…”

Section: Introductionmentioning

confidence: 99%

FeCo₂S₄@Ni@graphene Nanocomposites with Rich Defects Induced by Heterointerface Engineering for High-Performance Supercapacitors

Zheng

Jiang

et al. 2021

ACS Appl. Energy Mater.

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Rational designing advanced materials with multicomponents and multiscale nanostructures is an important pathway to promote the rapid development and practical application of high-performance supercapacitors. Herein, FeCo2S4@Ni@graphene nanocomposites are prepared through electroless depositionhydrothermal two-step method. In this hybrid structure, the metal nickel as a conductive bridge significantly enhances the charge transport and the structural stability between FeCo2S4 and graphene by encouraging the heterogeneous nucleation of FeCo2S4 on the active Ni@graphene. More importantly, the rich defects are induced into FeCo2S4@Ni@graphene by the interface engineering due to the lattice mismatch at the interface between Ni and FeCo2S4 and partial substitution of Ni for Co or Fe. These defects can provide additional faradic redox reactions and abundant active sites. Benefiting from the synergies of above advantages, the optimized FeCo2S4@Ni@graphene shows a specific capacity of 390.0 mAh g–1 at 1 A g–1. Additionally, the asymmetric supercapacitor based on FeCo2S4@Ni@graphene delivers a high energy density of 65.8 Wh kg–1 at 849 W kg–1, as well as capacitance retention of 89.2% after 6000 cycles at 20 A g–1. This work proposes an effective strategy, which is to regulate the defects in transition-metal compounds through heterointerface engineering to prepare advanced energy-storage materials.

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“…It is better than some previous reports. [39][40][41][42][43] Furthermore, 85.7% capacitance retention is achieved aer 10 000 cycles at 2 A g À1 (Fig. 5h).…”

Section: Resultsmentioning

confidence: 85%

Realizing high performance flexible supercapacitors by electrode modification

et al. 2021

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Improving supercapacitive performance of CNTs/NiCo2S4 composites by interface regulation

Cited by 32 publications

References 46 publications

Ultrafast Microwave Synthesis of Nickel-Cobalt Sulfide/Graphene Hybrid Electrodes for High-Performance Asymmetrical Supercapacitors

Ultrafast Microwave Synthesis of Nickel-Cobalt Sulfide/Graphene Hybrid Electrodes for High-Performance Asymmetrical Supercapacitors

FeCo₂S₄@Ni@graphene Nanocomposites with Rich Defects Induced by Heterointerface Engineering for High-Performance Supercapacitors

Realizing high performance flexible supercapacitors by electrode modification

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Improving supercapacitive performance of CNTs/NiCo2S4 composites by interface regulation

Cited by 32 publications

References 46 publications

Ultrafast Microwave Synthesis of Nickel-Cobalt Sulfide/Graphene Hybrid Electrodes for High-Performance Asymmetrical Supercapacitors

Ultrafast Microwave Synthesis of Nickel-Cobalt Sulfide/Graphene Hybrid Electrodes for High-Performance Asymmetrical Supercapacitors

FeCo2S4@Ni@graphene Nanocomposites with Rich Defects Induced by Heterointerface Engineering for High-Performance Supercapacitors

Realizing high performance flexible supercapacitors by electrode modification

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Resources

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FeCo₂S₄@Ni@graphene Nanocomposites with Rich Defects Induced by Heterointerface Engineering for High-Performance Supercapacitors