A high energy density fiber-shaped supercapacitor based on zinc-cobalt bimetallic oxide nanowire forests on carbon nanotube fibers

Yang, Zhao; Yang, Yu; Lu, Chun-xiang; Zhang, Yongyi; Zhang, Xiaohua; Liu, Yuyu

doi:10.1016/j.carbon.2019.12.081

Cited by 3 publications

(5 citation statements)

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“…Further, the device shown good performance under high current density of 25 mA cm −2 with an areal energy density of ~20 µWh cm −2 at a high power density of 16.25 mW cm −2 . The obtained areal energy density and power density values of the present supercapacitor are larger than the values of recently reported CNT based SCs [27] , [37] , [38] , [39] , [40] , [41] , [42] , [43] , [44] , [45] . As the cycling stability is particularly important to employ the device in practical applications, the cycling test was conducted for 6000 cycles.…”

Section: Resultscontrasting

confidence: 78%

Preparation of NiO decorated CNT/ZnO core-shell hybrid nanocomposites with the aid of ultrasonication for enhancing the performance of hybrid supercapacitors

Jayababu

Kim

et al. 2021

Ultrasonics Sonochemistry

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Section: Resultscontrasting

confidence: 78%

Preparation of NiO decorated CNT/ZnO core-shell hybrid nanocomposites with the aid of ultrasonication for enhancing the performance of hybrid supercapacitors

Jayababu

Kim

et al. 2021

Ultrasonics Sonochemistry

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“…As shown in Figure 5c, the enclosed area of the CV curve of the PPy CF/ CNTF FSSC is much larger than that of the bare CNTF due to the combination effect of PPy and the CNTF, which was consistent with the reported results. 18,52 However, it was much lower than that of the PPy VANA/CNTF, demonstrating that the 3D architecture of the PPy VANA/CNTF played an important role in the performance of the supercapacitor. Owing to the 3D hierarchical structure and high specific surface area of the PPy VANA/CNTF, the diffusion of the electrolyte was greatly accelerated and the ion transport path was greatly reduced, which further improved the performance of the PPy VANA/CNTF supercapacitor.…”

Section: Resultsmentioning

confidence: 98%

“…The higher magnification image in Figure b shows that the CNTs are with diameters of about 19.3 nm, between which there are many interstices. The CNTs are highly aligned and tightly bundled in the bare fiber, which showed a high conductivity because of the great reduction of the contact resistance between individual CNTs with electron transport along the fibers and a high tensile strength because of the π–π conjugation effect between the aligned CNTs. , Therefore, the CNTFs can be employed as working electrodes for the deposition of PPy on to them by an electrochemical method.…”

Section: Resultsmentioning

confidence: 99%

“…CNTFs, with a large specific area, high conductivity, excellent mechanical property, and good chemical and structural stability for sustaining fast and long charge/discharge cycling, represent a fascinating new class of electronic materials with potential applications in flexible and wearable supercapacitors. − However, their relatively low electrocatalytic activities and poor capacitance performance restrict their application in supercapacitors. , To resolve this problem, CNTF hybrids with various materials, such as conducting polymers (CPs), graphene, and oxides, were explored to further improve the supercapacitor performance. − …”

Section: Introductionmentioning

confidence: 99%

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Facile Construction of Three-Dimensional Architectures of a Nanostructured Polypyrrole on Carbon Nanotube Fibers and Their Effect on Supercapacitor Performance

Huang

Xia

et al. 2023

ACS Appl. Energy Mater.

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Conducting polymer and carbon nanotube hybrids have been researched intensively in recent years for electrodes of fiber-shaped supercapacitors (FSSCs) toward flexible and wearable energy storage devices. Here, three-dimensional (3D) hierarchical polypyrrole (PPy)/carbon nanotube fiber (CNTF) architectures have been prepared by a facial electrodeposition method for flexible FSSC electrodes. PPy nanoparticles, vertically aligned nanowire arrays (VANAs), and nanowire networks were synthesized on CNTFs, respectively, to construct three types of 3D architectures by controlling the electrodeposition condition of PPy. The influence of the 3D architectures of PPy/CNTF electrodes on the performance of the assembled quasi-solid-state FSSCs has been carefully studied. The FSSCs with PPy VANAs showed a much higher specific capacitance than that with PPy nanoparticles because the hierarchical porous structure of PPy VANAs provides a higher accessibility of electrolytic ions and a higher Coulombic efficiency than that with the PPy nanowire network. The PPy VANA-/CNTF-based FSSCs displayed high flexibility, stability, and a specific capacitance of 178.14 F g–1 at 0.4 A g–1, which is much higher than that based on common PPy cauliflower-like film/CNTF electrodes (92.06 F g–1) and pure CNTF electrodes (8.48 F g–1) under the same conditions, demonstrating the great advantages of the 3D hierarchical structure.

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“…On the basis of Figure 4(b), HCF exhibited homogeneous and dense mesopores. The SEM pattern of PCF reveals that as a result of etching process of carbon skeleton and KOH, the honeycomb‐like structure has been constructed [32] . By contrast, the SEM images of PCF‐1 and PCF‐2 are shown in Figure S1.…”

Section: Resultsmentioning

confidence: 99%

Direct Ink Printing for Flexible Zinc‐Ion‐Hybrid Micro‐Supercapacitors Based on Hierarchical Porous Carbon as Cathode

Zhang

et al. 2021

ChemElectroChem

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Flexible artificial intelligence and rechargeable electronic devices have been the research hotpot due to the status quo of the energy crisis. However, the existing energy storage devices suffering from undesirable electrochemical performance, poor flexibility, and toxicity, have unsatisfactory practical application prospect. Owing to its unique stability, normal electrodes in energy storage equipment are built out of carbon‐based materials. Recently, zinc hybrid supercapacitors have attracted a lot of attention. Herein, a high‐performance zinc‐ion hybrid micro‐supercapacitor is successfully constructed using hierarchical honeymoon‐like porous carbon frameworks as cathode by direct ink printing method. Due to the bivalent feature of zinc and electric double layered capacitive characteristic of the porous carbon, the optimized device possesses excellent electrochemical performance of excellent specific capacity of 189.06 mA h g−1 at a current density of 1 mA cm−2, high energy density of76.38 Wh kg−1, power density of 499.94 W kg−1 and superior capacity retention of 95.71 % at 10 mA cm−2 after 1000 cycles. Through direct ink printing, the as‐assembled zinc hybrid micro‐supercapacitors based on flexible substrate exhibit outstanding flexibility with controllable active material mass loading.

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A high energy density fiber-shaped supercapacitor based on zinc-cobalt bimetallic oxide nanowire forests on carbon nanotube fibers

Cited by 3 publications

References 0 publications

Preparation of NiO decorated CNT/ZnO core-shell hybrid nanocomposites with the aid of ultrasonication for enhancing the performance of hybrid supercapacitors

Preparation of NiO decorated CNT/ZnO core-shell hybrid nanocomposites with the aid of ultrasonication for enhancing the performance of hybrid supercapacitors

Facile Construction of Three-Dimensional Architectures of a Nanostructured Polypyrrole on Carbon Nanotube Fibers and Their Effect on Supercapacitor Performance

Direct Ink Printing for Flexible Zinc‐Ion‐Hybrid Micro‐Supercapacitors Based on Hierarchical Porous Carbon as Cathode

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