Hierarchical Mn-doped Fe2O3@rGO hollow core-shell spheres for high-performance hybrid capacitor

Zhang, Jijun; Wang, Yan; Liao, Hsiang-Ju; Yang, Tzu‐Yi; Chen, Zexiang; Yan, Xinyu; Zhou, Zhiyu; Lv, Huifang; Liu, Wenwu; Chueh, Yu‐Lun

doi:10.1016/j.mtener.2020.100388

Cited by 11 publications

(10 citation statements)

References 53 publications

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“…The two peaks of C–O–Bi (531.9 eV) and Bi–O–Bi (529.8 eV) confirm the coordination between Bi–Bi 2 O 3 NPs and rGO. 37,38 In addition, the peak at 533.4 eV can be assigned to C–O–C, 39 which is the possible interaction site for Bi–Bi 2 O 3 and rGO. The N 2 adsorption/desorption isotherm of Bi–Bi 2 O 3 /rGO-20 is displayed in Fig.…”

Section: Resultsmentioning

confidence: 99%

Uniform Bi–Bi₂O₃ nanoparticles/reduced graphene oxide composites for high-performance aqueous alkaline batteries

Shi¹,

Zhao

Zheng

et al. 2022

Dalton Trans.

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Section: Resultsmentioning

confidence: 99%

Uniform Bi–Bi₂O₃ nanoparticles/reduced graphene oxide composites for high-performance aqueous alkaline batteries

Shi¹,

Zhao

Zheng

et al. 2022

Dalton Trans.

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“…and anion doping (e.g., N, P, or F). Owing to the synergistic effect of the multiple transition metal atoms, combination of various TMCs can provide highly electrochemical conductivity and abundant redox activity, which is beneficial for the electrochemical performance [127,128,129]. For example, Liu's group systematically studied the influence of cobalt and manganese atoms (Co, Mn) on the single doping or co-doping of Ni(OH) 2 crystals by DFT calculations [130].…”

Section: Heterogeneous Atoms Dopingmentioning

confidence: 99%

Recent Developments of Transition Metal Compounds-Carbon Hybrid Electrodes for High Energy/Power Supercapacitors

et al. 2021

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Due to their rapid power delivery, fast charging, and long cycle life, supercapacitors have become an important energy storage technology recently. However, to meet the continuously increasing demands in the fields of portable electronics, transportation, and future robotic technologies, supercapacitors with higher energy densities without sacrificing high power densities and cycle stabilities are still challenged. Transition metal compounds (TMCs) possessing high theoretical capacitance are always used as electrode materials to improve the energy densities of supercapacitors. However, the power densities and cycle lives of such TMCs-based electrodes are still inferior due to their low intrinsic conductivity and large volume expansion during the charge/discharge process, which greatly impede their large-scale applications. Most recently, the ideal integrating of TMCs and conductive carbon skeletons is considered as an effective solution to solve the above challenges. Herein, we summarize the recent developments of TMCs/carbon hybrid electrodes which exhibit both high energy/power densities from the aspects of structural design strategies, including conductive carbon skeleton, interface engineering, and electronic structure. Furthermore, the remaining challenges and future perspectives are also highlighted so as to provide strategies for the high energy/power TMCs/carbon-based supercapacitors.

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“…Activated carbon (AC) has specific properties, such as high specific area, balanced conductivity, high volume of porous structure and high stability in acidic condition (pH

7), that potentially make it an ideal material for the half-cell electrode [ 1 , 2 , 3 , 4 , 5 ]. Graphitic material is mostly used as a high-efficient electrode-material.…”

Section: Introductionmentioning

confidence: 99%

Surface Modification Effect and Electrochemical Performance of LiOH-High Surface Activated Carbon as a Cathode Material in EDLC

et al. 2021

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This study aimed to improve the performance of the activated carbon-based cathode by increasing the Li content and to analyze the effect of the combination of carbon and oxidizing agent. The crystal structure and chemical structure phase of Li-high surface area activated carbon material (Li-HSAC) was analyzed by X-ray diffraction (XRD) and Raman spectroscopy, the surface state and quantitative element by scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX) and the surface properties with pore-size distribution by Brunauer–Emmett–Teller (BET), Barrett–Joyner–Halenda (BJH) and t-plot methods. The specific surface area of the Li-YP80F is 1063.2 m2/g, micropore volume value is 0.511 cm3/g and mesopore volume is 0.143 cm3/g, and these all values are higher than other LiOH-treated carbon. The surface functional group was analyzed by a Boehm titration, and the higher number of acidic groups compared to the target facilitated the improved electrolyte permeability, reduced the interface resistance and increased the electrochemical properties of the cathode. The oxidizing agent of LiOH treated high surface area of activated carbon was used for the cathode material for EDLC (electric double layer capacitor) to determine its electrochemical properties and the as-prepared electrode retained excellent performance after 10 cycles and 100 cycles. The anodic and cathodic peak current value and peak segregation of Li-YP80F were better than those of the other two samples, due to the micropore-size and physical properties of the sample. The oxidation peak current value appeared at 0.0055 mA/cm2 current density and the reduction peak value at –0.0014 mA/cm2, when the Li-YP80F sample used to the Cu-foil surface. The redox peaks appeared at 0.0025 mA/cm2 and –0.0009 mA/cm2, in the case of using a Nickel foil, after 10 cycling test. The electrochemical stability of cathode materials was tested by 100 recycling tests. After 100 recycling tests, peak current drop decreased the peak profile became stable. The LiOH-treated high surface area of activated carbon had synergistically upgraded electrochemical activity and superior cycling stability that were demonstrated in EDLC.

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Hierarchical Mn-doped Fe2O3@rGO hollow core-shell spheres for high-performance hybrid capacitor

Cited by 11 publications

References 53 publications

Uniform Bi–Bi₂O₃ nanoparticles/reduced graphene oxide composites for high-performance aqueous alkaline batteries

Uniform Bi–Bi₂O₃ nanoparticles/reduced graphene oxide composites for high-performance aqueous alkaline batteries

Recent Developments of Transition Metal Compounds-Carbon Hybrid Electrodes for High Energy/Power Supercapacitors

Surface Modification Effect and Electrochemical Performance of LiOH-High Surface Activated Carbon as a Cathode Material in EDLC

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Hierarchical Mn-doped Fe2O3@rGO hollow core-shell spheres for high-performance hybrid capacitor

Cited by 11 publications

References 53 publications

Uniform Bi–Bi2O3 nanoparticles/reduced graphene oxide composites for high-performance aqueous alkaline batteries

Uniform Bi–Bi2O3 nanoparticles/reduced graphene oxide composites for high-performance aqueous alkaline batteries

Recent Developments of Transition Metal Compounds-Carbon Hybrid Electrodes for High Energy/Power Supercapacitors

Surface Modification Effect and Electrochemical Performance of LiOH-High Surface Activated Carbon as a Cathode Material in EDLC

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Product

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Uniform Bi–Bi₂O₃ nanoparticles/reduced graphene oxide composites for high-performance aqueous alkaline batteries

Uniform Bi–Bi₂O₃ nanoparticles/reduced graphene oxide composites for high-performance aqueous alkaline batteries