Electrochemical performance of a coaxial fiber-shaped asymmetric supercapacitor based on nanostructured MnO2/CNT-web paper and Fe2O3/carbon fiber electrodes

Patil, Bebi; Ahn, Suhyun; Yu, Seongil; Song, Hyeonjun; Kim, Woo Jung; Ahn, Hye Shin

doi:10.1016/j.carbon.2018.03.080

Cited by 124 publications

(43 citation statements)

References 64 publications

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“…This finding was consistent with Figure D. In Figure C, the GCD curves showed high symmetry, which illustrated that MnO 2 /CNTs have good electrochemical reversibility and capacitance performance . The capacitance were 1257.2, 1174.2, 1132.9, 1083.8, and 1031.1 F g −1 at 1 to 10 A g −1 , respectively.…”

Section: Resultssupporting

confidence: 86%

“…In Figure 4C, the GCD curves showed high symmetry, which illustrated that MnO 2 /CNTs have good electrochemical reversibility and capacitance performance. 37,42 The capacitance were 1257.2, 1174.2, 1132.9, 1083.8, and 1031.1 F g −1 at 1 to 10 A g −1 , respectively. The rate performance of amorphous MnO 2 /CNT electrode material was displayed in Figure 4D.…”

Section: Exploration Of Reaction Conditionsmentioning

confidence: 99%

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Synthesis and characterisation of amorphous MnO ₂ /CNT via solid‐state microwave for high‐performance supercapacitors

et al. 2020

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Summary Amorphous MnO2 was attached to carbon nanotubes (CNTs) in 60 seconds by solid‐state microwave method. As electrodes in supercapacitors, the coactions of the MnO2 and CNT augmented the actual value of capacitance to 1250 F g−1, and cycle steadiness held 80% of the starting value after 7000 cycles. The equipped MnO2/CNT//AC asymmetric supercapacitor (ASC) manifested preferable energy density with 33.5 Wh kg−1 (at 400 W kg−1). Its glorious electrochemical properties of MnO2/CNT demonstrated that the microwave method has great potency to realise the composite of electrode materials.

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Section: Resultssupporting

confidence: 86%

Section: Exploration Of Reaction Conditionsmentioning

confidence: 99%

Synthesis and characterisation of amorphous MnO ₂ /CNT via solid‐state microwave for high‐performance supercapacitors

et al. 2020

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“…For MnO/Mn 3 O 4 , Mn2p 3/2 and Mn2p 1/2 peaks are fitted into four peaks 642.22 eV and 640.18 eV, 652.44 eV and 655.70 eV, which is consistent with Mn 3+ and Mn 2+ . After the electrochemical oxidation, Mn2p narrow spectrum for Na 0.91 MnO 2 shows four peaks with the binding energy at 642.90 eV and 641.86 eV, 654.57 eV and 653.10 eV, corresponding to Mn 4+ and Mn 3+ . For the core‐level O1s spectra (Figure d), both MnO/Mn 3 O 4 and Na 0.91 MnO 2 show three peaks at the binding energy of 530.11 eV, 531.49 eV and 532.79 eV, which is consistent with Mn−O, Mn−OH and −OH from adsorbed water .…”

Section: Resultsmentioning

confidence: 73%

Wider Voltage Window, High Capacity and Ultra‐Long Life of an Na_0.91MnO₂ Cathode for an Aqueous High‐Performance Supercapacitor

Qin

2019

Batteries & Supercaps

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The potential window of an aqueous supercapacitor cathode is usually less than 1.3 V, which hinders the enhancement of the energy density and can be conquered by activating the multiple redox reactions of the cathode. Herein, tetragonal phase Na 0.91 MnO 2 nanosheets/nanowires arrays with high cation content are produced in situ on an electrochemically treated carbon cloth by an electrochemical oxidation method. It is observed that the Na 0.91 MnO 2 nanosheet/nanowire array electrode can operate stably within the potential window of À 0.6 V to 1.2 V (vs Ag/AgCl) with an ultrahigh capacity of 856 C g À 1 and an outstanding stability and excellent rate ability. With a carbon fiber fabric with a large surface area as the anode, the Na 0.91 MnO 2 cathode in the two-electrode cell can still operate stably within the voltage range from 0 to 2.07 V (still within the range of the three redox peak couples, demonstrating a high energy density of 138 Wh kg À 1 , an excellent power density of 33 kW kg À 1 as well as 100 % retention even after 120 000 cycles. This work may pave the way for the development of an aqueous supercapacitor cathode with a wider potential window. amount of deionized water and dried at 60°C in an oven overnight. The electrochemical treated carbon cloth is denoted as ECC.

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“…The specific capacitance values of the device calculated from the GCD curves as a function of the current density are plotted in Figure 6e. [4,22,33,34,43,[55][56][57][58][59] Furthermore, the as-assembled FASC device possessed excellent cycling stability ( Figure S27, Supporting Information). The relationship between the energy density and the power density of the FASC device is presented in Figure 6f alongside the corresponding values for previously reported devices.…”

Section: Resultsmentioning

confidence: 99%

All Hierarchical Core–Shell Heterostructures as Novel Binder‐Free Electrode Materials for Ultrahigh‐Energy‐Density Wearable Asymmetric Supercapacitors

Zhang

Sun

et al. 2018

Advanced Science

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High‐performance fiber‐shaped energy‐storage devices are indispensable for the development of portable and wearable electronics. Composite pseudocapacitance materials with hierarchical core–shell heterostructures hold great potential for the fabrication of high‐performance asymmetric supercapacitors (ASCs). However, few reports concerning the assembly of fiber‐shaped ASCs (FASCs) using cathode/anode materials with all hierarchical core–shell heterostructures are available. Here, cobalt‐nickel‐oxide@nickel hydroxide nanowire arrays (NWAs) and titanium nitride@vanadium nitride NWAs are constructed skillfully with all hierarchical core–shell heterostructures directly grown on carbon nanotube fibers and are shown to exhibit ultrahigh capacity and specific capacitance, respectively. The specific features and outstanding electrochemical performances of the electrode materials are exploited to fabricate an FASC device with a maximum working voltage of 1.6 V, and this device exhibits a high specific capacitance of 109.4 F cm−3 (328.3 mF cm−2) and excellent energy density of 36.0 mWh cm−3 (108.1 µWh cm−2). This work therefore provides a strategy for constructing all hierarchical core–shell heterostructured cathode and anode materials with ultrahigh capacity for the fabrication of next‐generation wearable energy‐storage devices.

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Electrochemical performance of a coaxial fiber-shaped asymmetric supercapacitor based on nanostructured MnO2/CNT-web paper and Fe2O3/carbon fiber electrodes

Cited by 124 publications

References 64 publications

Synthesis and characterisation of amorphous MnO ₂ /CNT via solid‐state microwave for high‐performance supercapacitors

Synthesis and characterisation of amorphous MnO ₂ /CNT via solid‐state microwave for high‐performance supercapacitors

Wider Voltage Window, High Capacity and Ultra‐Long Life of an Na_0.91MnO₂ Cathode for an Aqueous High‐Performance Supercapacitor

All Hierarchical Core–Shell Heterostructures as Novel Binder‐Free Electrode Materials for Ultrahigh‐Energy‐Density Wearable Asymmetric Supercapacitors

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Electrochemical performance of a coaxial fiber-shaped asymmetric supercapacitor based on nanostructured MnO2/CNT-web paper and Fe2O3/carbon fiber electrodes

Cited by 124 publications

References 64 publications

Synthesis and characterisation of amorphous MnO 2 /CNT via solid‐state microwave for high‐performance supercapacitors

Synthesis and characterisation of amorphous MnO 2 /CNT via solid‐state microwave for high‐performance supercapacitors

Wider Voltage Window, High Capacity and Ultra‐Long Life of an Na0.91MnO2 Cathode for an Aqueous High‐Performance Supercapacitor

All Hierarchical Core–Shell Heterostructures as Novel Binder‐Free Electrode Materials for Ultrahigh‐Energy‐Density Wearable Asymmetric Supercapacitors

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Product

Resources

About

Synthesis and characterisation of amorphous MnO ₂ /CNT via solid‐state microwave for high‐performance supercapacitors

Synthesis and characterisation of amorphous MnO ₂ /CNT via solid‐state microwave for high‐performance supercapacitors

Wider Voltage Window, High Capacity and Ultra‐Long Life of an Na_0.91MnO₂ Cathode for an Aqueous High‐Performance Supercapacitor