High-rate-capability asymmetric supercapacitor device based on lily-like Co<sub>3</sub>O<sub>4</sub>nanostructures assembled using nanowires

Wang, Yanjie; Huang, Shaobo; Yin, Lu; Cui, Shizhong; Chen, Weihua; Mi, Liwei

doi:10.1039/c6ra27356d

Cited by 22 publications

(9 citation statements)

References 57 publications

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“…While for FeCo 2 O 4 NSs//AC ASC, it exhibited a high energy density of 37.1 W h kg –1 at 928.0 W kg –1 and still maintained 23.3 W h kg –1 at a higher power density of 12640.6 W kg –1 . The value (37.1 W h kg –1 ) for FeCo 2 O 4 NSs//AC ASC is superior than some of reported data for other ASCs such as multiple hierarchical NiCo 2 O 4 //AC (21.4 W h kg –1 at 350 W kg –1 ), Co 3 O 4 coral-like NWs//AC (18.3 W h kg –1 at 750 W kg –1 ), Co 3 O 4 core–shell MSs//AC (16.6 W h kg –1 at 883 W kg –1 ), pod-like MnCo 2 O 4.5 microstructures//AC (19.65 W h kg –1 at 810.64 W kg –1 ), FeCo 2 O 4 @MnO 2 core–shell NSs/CFs//AC (22.68 W h kg –1 at 406.01 W kg –1 ), FeCo 2 O 4 wires/NFs//AC (23 W h kg –1 at 3780 W kg –1 ), FeCo 2 O 4 @MnO 2 core-sheath architecture/NFs//AC (30.55 W h kg –1 at 515.6 W kg –1 ), MgCo 2 O 4 twinned-hemispheres//AC (30.6 W h kg –1 at 861 W kg –1 ), and even some ASCs assembled from the binder-free electrode materials including lily-like Co 3 O 4 /NFs//AC (34 W h kg –1 at 1963 W kg –1 ) and gully network Co 3 O 4 NWs/NFs//AC (33.8 W h kg –1 at 224 W kg –1 ) …”

Section: Resultscontrasting

confidence: 60%

Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Sun

et al. 2020

ACS Appl. Energy Mater.

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Transition metal oxides (TMOs) can serve as advanced electrode materials and have attracted extensive attention in the past decade. Herein, porous FeCo 2 O 4 microspheres (FeCo 2 O 4 MSs) and FeCo 2 O 4 nanosheets (FeCo 2 O 4 NSs) have been successfully synthesized in different solvent systems, accompanied by a corresponding annealing treatment of precursors. The FeCo 2 O 4MSs and NSs possessed a mesoporous structure, and the BET surface areas reached 40.9 and 38.5 m 2 g −1 , respectively. The electrochemical studies were performed in a KOH aqueous electrolyte, and such FeCo 2 O 4 MSs delivered 231.5 C g −1 at 1 A g −1 and exhibited a good long-term cycling performance during 5000 cycles with 71.3% capacity retention. In contrast, the FeCo 2 O 4 NSs delivered a higher capacity of 339.0 C g −1 at 1 A g −1 and exhibited a better rate capability with 73% capacity retention at 13 A g −1 . Furthermore, the assembled FeCo 2 O 4 NSs//AC ASC could preserve 100.5% specific capacity after 5000 cycles and exhibited a high energy density of 37.1 W h kg −1 at 928.0 W kg −1 , while the FeCo 2 O 4 MSs//AC ASC possessed a relatively low energy density with 26.2 W h kg −1 at 965.5 W kg −1 . The outstanding electrochemical behavior of FeCo 2 O 4 NSs and MSs makes them promising electrode materials in electrochemical storage devices. Additionally, this current synthetic strategy possesses some advantages such as simple handling, low maintenance cost, and environmental friendliness; thus, it can be employed for synthesizing other TMOs with superior electrochemical properties.

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Section: Resultscontrasting

confidence: 60%

Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Sun

et al. 2020

ACS Appl. Energy Mater.

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“…Indeed we believe that an operating voltage of more than 1.4 V can also be achieved for Co 3 O 4 || Bi 2 O 3 asymmetric assembly without significantly decomposing the aqueous electrolyte. This is because of the fact that we do not observe any signature of oxygen evolution in the CV profiles (in Figure B) in a potential window of 1.4 V. Note that this kind of phenomenon is common for TMOs and is reported thoroughly in the literature . Evidently, the CV profiles of the asymmetric device display well-defined redox peaks at all scan rates, which demonstrate pseudocapacitive charge storage in the device.…”

Section: Results and Discussionsupporting

confidence: 50%

“…This is because of the fact that we do not observe any signature of oxygen evolution in the CV profiles (in Figure 8B) in a potential window of 1.4 V. Note that this kind of phenomenon is common for TMOs and is reported thoroughly in the literature. 58 Evidently, the CV profiles of the asymmetric device display well-defined redox peaks at all scan rates, which demonstrate pseudocapacitive charge storage in the device. The intensity of oxidation peak in the redox systems is found to have a linear relationship with the flux of OH − ions, that is, scan rate (inset of Figure 8B), which is a strong signature of higher permeability of the electrolyte ions in the device.…”

Section: Acs Applied Nano Materialsmentioning

confidence: 84%

Sedgelike Porous Co₃O₄ Nanoarrays as a Novel Positive Electrode Material for Co₃O₄ || Bi₂O₃ Asymmetric Supercapacitors

Paliwal

Meher

2019

ACS Appl. Nano Mater.

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Tuning crystallinity and surface functionality are supreme for extracting maximum charge storage efficiency from electrode materials for energy storage devices. Contextually, suitable organic additives with sluggish precipitants are known to significantly regulate the kinetics of reactions and dimensionality of crystals leading to structures with tuned crystallinity and surface functionality. Accordingly, herein, extremely uniform sedgelike highly porous Co3O4 nanoarrays were synthesized by homogeneous precipitation method using sodium dodecyl sulfate as the organic additive and urea as the sluggish precipitant, under hydrothermal condition. The distinctive physicochemical properties of Co3O4 were identified by powder X-ray diffraction, field-emission scanning electron microscopy, high-resolution transmission electron microscopy, Brunauer–Emmett−Teller surface area, and UV–vis diffuse reflectance spectroscopy analyses, which show ∼2 nm crystallinity, uniform sedgelike structure, presence of model micro- and mesopores, and signatures of quantum confinement. Thorough electrochemical studies show that the Co3O4 nanoarrays sample possess lower electrochemical series resistance of 0.4 Ω, and it offers a very high rate-specific capacitance of 2510 F g–1 at an applied current density of 4 A g–1, and retains ∼42% of capacitance at eightfold higher applied current density, when measured in a three-electrode assembly. The sedgelike Co3O4 was used as a positive electrode material, and its compatibility was assessed with microbelt-like two-dimensional (2D) Bi2O3 as the negative electrode material, in a redox ensuing Co3O4 || Bi2O3 asymmetric supercapacitor (ASC) device with a wide operating potential window of 1.4 V. The ASC device offers very high areal and mass-specific capacitance of 479 mF cm–2 & 71 F g–1, respectively, at an applied current density of 6 mA cm–2 and exhibits an excellent rate capacitance of ∼50% at an extremely high current density of 48 mA cm–2. The ASC device also retains ∼95% of the areal capacitance after 5000 galvanostatic charge–discharge cycles at an applied current density of 10 mA cm–2. The Co3O4 || Bi2O3 ASC device also offers high energy density of ∼38.5 Wh kg–1 at a power density of ∼1225 W kg–1 and retains ∼47% of the energy density at a very high power density of ∼9473 W kg–1. Factually, the present study manifests that ideal porosity and surface properties of sedgelike Co3O4 nanoarrays allow unimpeded OH– ion diffusion, and the bundled structure provides flake-off resistance/mechanical stability during harmonious redox reactions with 2D Bi2O3 during high rate operation of the ASC device. It is proposed that the all-new Co3O4 || Bi2O3 asymmetric assimilation will open new avenues in the designing of high rate ASCs for power grid applications.

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“…It is proved that the specific surface is indeed a critical parameter to determine the specific capacitance of these electrode materials . These researching results demonstrate that special morphological structure of the material really have remarkable advantage. − Moreover, SnS has been proven to have potentially excellent properties for application in photovoltaic devices and electrochemical capacitors. But its application in supercapacitors has been hindered by the lower specific capacitance.…”

Section: Introductionmentioning

confidence: 80%

Facile Synthesis of Different Morphologies of Cu₂SnS₃ for High-Performance Supercapacitors

Wang

Tian

Jiang

et al. 2017

ACS Appl. Mater. Interfaces

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CuSnS is considered as an emerging potential candidate for electrode materials due to considerable interlayer spaces and tunnels in its crystal structures and excellent conducting ability. Ternary CuSnS as anode in lithium ion batteries has already been reported, but it is rarely mentioned to be applied in supercapacitors which is considered to be a complementary energy storage device for lithium ion batteries. It is an effective method to improve the electrochemical performance of materials by adjusting the morphology and microstructure of materials. In present study, ternary nanosheet-assembled CuSnS microspheres (M-CTS) and nanoparticles-like CuSnS (N-CTS) are synthesized via a facile solvothermal route. The results suggest that CuSnS microspheres (M-CTS) exhibit better capacitive performance compared with CuSnS (N-CTS) nanoparticles, which means that morphology does have a significant effect on the electrochemical reaction. M-CTS presents excellent supercapacitor performances with the high specific capacity of about 406 C g at a current density of 1 A g and achieves a high energy density of 85.6 W h kg and power density of 720 W kg. The remarkable electrochemical performance of CuSnS can be attributed to the large specific surface area, smaller average pore size, and improved electrical conductivity. Our research indicates that it is very suitable for large-scale production and has enormous potential in the practical application of high-performance supercapacitors.

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High-rate-capability asymmetric supercapacitor device based on lily-like Co₃O₄nanostructures assembled using nanowires

Abstract: In this paper, high-rate-capability asymmetric supercapacitor device assembled by lily-like Co3O4 nanostructures and active carbon was presented.

Cited by 22 publications

References 57 publications

Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Sedgelike Porous Co₃O₄ Nanoarrays as a Novel Positive Electrode Material for Co₃O₄ || Bi₂O₃ Asymmetric Supercapacitors

Facile Synthesis of Different Morphologies of Cu₂SnS₃ for High-Performance Supercapacitors

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High-rate-capability asymmetric supercapacitor device based on lily-like Co3O4nanostructures assembled using nanowires

Abstract: In this paper, high-rate-capability asymmetric supercapacitor device assembled by lily-like Co3O4 nanostructures and active carbon was presented.

Cited by 22 publications

References 57 publications

Simple Preparation of Porous FeCo2O4 Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Simple Preparation of Porous FeCo2O4 Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Sedgelike Porous Co3O4 Nanoarrays as a Novel Positive Electrode Material for Co3O4 || Bi2O3 Asymmetric Supercapacitors

Facile Synthesis of Different Morphologies of Cu2SnS3 for High-Performance Supercapacitors

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High-rate-capability asymmetric supercapacitor device based on lily-like Co₃O₄nanostructures assembled using nanowires

Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Sedgelike Porous Co₃O₄ Nanoarrays as a Novel Positive Electrode Material for Co₃O₄ || Bi₂O₃ Asymmetric Supercapacitors

Facile Synthesis of Different Morphologies of Cu₂SnS₃ for High-Performance Supercapacitors