Heterogeneous cobalt polysulfide leaf-like array/carbon nanofiber composites derived from zeolite imidazole framework for advanced asymmetric supercapacitors

Liu, Wenjie; Zhao, Yan; Zheng, Jihua; Jin, Dunyuan; Wang, Yaqing; Yang, Shi-Jie; Li, Guochun; Bu, Yongfeng; Qiao, Fen

doi:10.1016/j.jcis.2021.08.066

Cited by 27 publications

(2 citation statements)

References 60 publications

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“…The lowest R s value of NiCo LDH/ENF reveals the effectiveness of the etched substrate in lowering the resistance of a NiCo LDH nanoarrays/collector interface. Meanwhile, NiCo LDH/ENF showed a smaller R ct value with a steeper line in the low-frequency region, indicating a favorable electron/ion transfer nature …”

Section: Resultsmentioning

confidence: 97%

“…Meanwhile, NiCo LDH/ENF showed a smaller R ct value with a steeper line in the low-frequency region, indicating a favorable electron/ion transfer nature. 34 The galvanostatic charge/discharge curves of the electrodes in the potential range of 0−0.50 V are shown in Figure 4d and Figure S7. The obvious plateaus of the curves demonstrate the battery-type capacitive behavior of NiCo LDH electrodes.…”

Section: Resultsmentioning

confidence: 99%

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NiCo Layered Double Hydroxide Nanoarrays Grown on an Etched Ni Foam Substrate for High-Performance Supercapacitor Electrode

Zhu

Zeng

et al. 2023

Energy Fuels

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Nickel foam (NF) with a desirable 3D open-pore structure is extensively adopted in developing integrated electrodes, and the enhanced interaction between the electrode materials and NF substrate is recognized as an effective method for a highperformance supercapacitor electrode with a low resistance nature and high stability. In this work, an etched NF (ENF) with residual nanosheets is adopted as a novel substrate to facilitate the capacitive activity of NiCo layered double hydroxide (NiCo LDH) nanowire arrays. NiCo LDH nanosheet arrays grown on a pristine NF substrate (NiCo LDH/NF) are synthesized initially and used as a precursor. Then, the ENF substrate with a residual nanosheet is obtained by partially removing NiCo LDH nanosheet arrays in a formamide/KOH mixed solution. Subsequently, NiCo LDH nanowire arrays are hydrothermally grown on ENF to form a NiCo LDH/ENF electrode. The role of the residual nanosheet on ENF is discussed in detail, in which the content of Ni 3+ /Co 3+ and the resistance nature of NiCo LDH/ENF can be optimized with the amount of residual nanosheets. Hence, the ENF substrate with an optimal amount of residual nanosheets is beneficial for retaining the adhesion of nanoarrays and realizing the low resistance nature in a mild route. The NiCo LDH/ENF electrode shows a capacity of 976.6 C g −1 at 1 A g −1 with excellent cyclic stability. The asassembled NiCo LDH/ENF//activated carbon hybrid supercapacitor delivers a high specific capacitance of 150.8 F g −1 at 1 A g −1 and achieves an energy density of 67.9 Wh kg −1 at a power density of 900 W kg −1 with an excellent cycle stability with a 90.6% capacity retention after 10,000 cycles, indicating high energy density and good stability.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

NiCo Layered Double Hydroxide Nanoarrays Grown on an Etched Ni Foam Substrate for High-Performance Supercapacitor Electrode

Zhu

Zeng

et al. 2023

Energy Fuels

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Revealing Energy Density in Porous Carbon Supercapacitors Using Hydroquinone Sulfonic Acid as Cathodic and Alizarin Red S as Anodic Redox Electrolytes

Abbasi,

Hekmat,

Shahrokhian

et al. 2024

Small

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Exploration of innovative strategies aiming to boost energy densities of supercapacitors without sacrificing the power density and long‐term stability is of great importance. Herein, highly porous nitrogen‐doped carbon spheres (NPCS) are decorated onto the graphite sheets (GSs) through a hydrothermal route, followed by a chemical activation. The capacitive performance of the NPCS is then enhanced by hydroquinone sulfonic acid (HSQA) incorporation in both cathodic electrolyte and electrode materials. Later, NPCS are decorated with polypyrrole (PPY), in which HSQA takes a versatile role as conjugated polymer dopant and cathodic redox additive. The capacitive performance of the negative electrodes is enhanced by incorporating of alizarin red S (ARS) as anodic redox additive. Finally, PPY(HQSA)@NPCS‐GS//NPCS‐GS asymmetric supercapacitor is assembled and tested in dual redox electrolyte system containing HQSA‐cathodic and ARS‐anodic electrolytes. This device delivers a remarkable energy density of 60.37 Wh kg−1, which is close or even better than lead acid batteries. Thus, the present work provides a novel pathway to develop high energy supercapacitors using redox active electrolytes for next‐generation energy storage applications.

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Bead-like cobalt-nitrogen co-doped carbon nanocage/carbon nanofiber composite: a high-performance oxygen reduction electrocatalyst for zinc-air batteries

Zhang

Zhao

et al. 2022

Nano Res.

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Heterogeneous cobalt polysulfide leaf-like array/carbon nanofiber composites derived from zeolite imidazole framework for advanced asymmetric supercapacitors

Cited by 27 publications

References 60 publications

NiCo Layered Double Hydroxide Nanoarrays Grown on an Etched Ni Foam Substrate for High-Performance Supercapacitor Electrode

NiCo Layered Double Hydroxide Nanoarrays Grown on an Etched Ni Foam Substrate for High-Performance Supercapacitor Electrode

Revealing Energy Density in Porous Carbon Supercapacitors Using Hydroquinone Sulfonic Acid as Cathodic and Alizarin Red S as Anodic Redox Electrolytes

Bead-like cobalt-nitrogen co-doped carbon nanocage/carbon nanofiber composite: a high-performance oxygen reduction electrocatalyst for zinc-air batteries

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