Temperature-dependent electrochemical capacitive performance of the α-Fe2O3 hollow nanoshuttles as supercapacitor electrodes

Zheng, Xin; Yan, Xiaoqin; Sun, Yihui; Yu, Yinsheng; Zhang, Guangjie; Shen, Yanwei; Liang, Qijie; Liao, Qingliang; Zhang, Yue

doi:10.1016/j.jcis.2015.12.024

Cited by 98 publications

(38 citation statements)

References 29 publications

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“…Our Co 3 O 4 nanobooks also show comparable specific capacitance to hollow fluffy cages [1], porous nanostructures [14], twin-spheres [28], and hierarchical nanoarchitectures [27]. The materials also exhibit much higher specific capacitances in comparison with MoS 2 [30] and α-Fe 2 O 3 [31], and they are also comparable to CoS 2 [32] and NiCo 2 S 4 [33]. We could further improve the electrochemical performances of our nanobooks through constructing hybrids with carbon materials or transitional metal sulfides [34].…”

Section: Resultsmentioning

confidence: 98%

Stepwise Splitting Growth and Pseudocapacitive Properties of Hierarchical Three-Dimensional Co3O4 Nanobooks

et al. 2017

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Three-dimensional hierarchical Co3O4 nanobooks have been synthesized successfully on a large scale by calcining orthorhombic Co(CO3)0.5(OH)·0.11H2O precursors with identical morphologies. Based on the influence of reaction time and urea concentration on the nanostructures of the precursors, a stepwise splitting growth mechanism can be proposed to understand the formation of the 3D nanobooks. The 3D Co3O4 nanobooks exhibit excellent pseudocapacitive performances with specific capacitances of 590, 539, 476, 453, and 421 F/g at current densities of 0.5, 1, 2, 4, and 8 A/g, respectively. The devices can retain ca. 97.4% of the original specific capacitances after undergoing charge–discharge cycle tests 1000 times continuously at 4 A/g.

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Section: Resultsmentioning

confidence: 98%

Stepwise Splitting Growth and Pseudocapacitive Properties of Hierarchical Three-Dimensional Co3O4 Nanobooks

et al. 2017

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“…However, the better values of the capacitance could be attributed the increased conductivity of the material due to the presence of the carbon support. One more factor contributing to the enhanced electrochemical behavior is that due to the porous nature of the material, shorter interval between the electrolyte and the active material is achieved leading to swift ion transfers …”

Section: Resultsmentioning

confidence: 99%

“…One more factor contributing to the enhanced electrochemical behavior is that due to the porous nature of the material, shorter interval between the electrolyte and the active material is achieved leading to swift ion transfers. 47 To further understand the stability of the material and its retention of charge after multiple cycles, constant current CD studies were performed and the results obtained at different current densities. Figure 7D shows the galvanostatic CD curves of SADC800 and Fe 2 O 3 -AC at a current density of 0.5 A/g.…”

Section: R ¼mentioning

confidence: 99%

Shape engineered three dimensional α-Fe₂ O₃ -activated carbon nano composite as enhanced electrochemical supercapacitor electrode material

Gannavarapu

Dandamudi

2018

Int J Energy Res

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Summary In the current work, we present a green and scalable microwave mediated synthesis of shape engineered nano ironoxide supported on high surface area activated carbon (AC) derived from spent sawdust from mushroom cultivation. The derived composites were characterized using scanning electron microscopy, high‐resolution tunneling electron microscopy, powder X‐ray diffraction, Braun Emmet Teller surface area analyzer, thermo gravimetric analysis, and Raman spectroscopic techniques. The AC/ironoxide composite exhibited specific surface area of 907.51 m2/gm, showed the Fe to be in the form hematite (ά‐Fe2O3) and was thermally stable up to 700°C. The ironoxide was found to be of nano size having flower like unique morphology. The nano composite material has a specific capacitance of 898 F/g at a scan rate of 10 mV/s and retained 95% of capacitance even after 10 000 charge‐discharge cycles. The excellent stability and unique morphology makes the composite an alluring material for super capacitor applications.

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“…In this review, progresses with respect to hollow structure of the single metal oxide (such as Co 3 O 4 , NiO, MnO 2 , Mn 3 O 4 , V 2 O 5 , Fe 2 O 3 , Nb 2 O 5 , and RuO 2 ), complex metal oxide (such as Ni–V–O, Ni–Co–O, Mn–Mn–O, Mn–Fe–O, Mn–Co–O, Co–Fe–O, and Ba–Ti–O), and carbon–metal oxide complex (such as C–NiO, C–MnO 2 , and C–Fe 3 O 4 ) are involved to investigate. Furthermore, SCs performances of these materials have been tested in various systems, and their electrochemical performances are introduced and compared.…”

Section: Introductionmentioning

confidence: 99%

Hollow Structural Transition Metal Oxide for Advanced Supercapacitors

Wei

Xue

et al. 2018

Adv Materials Inter

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are named as electrochemical double layer capacitors (EDLCs) and pseudocapacitors. [13][14][15] EDLCs produce capacitance from the electrostatic charge which is accumulated at electrode/electrolyte interface producing the electrostatic charge separation; besides, the ordinary electrode materials are carbon materials, such as activated carbon, graphene, and carbon nanotubes (Figure 1a). [16,17] Carbon-based materials, such as activated carbon, [18][19][20] carbon nanofibers, [21,22] carbon nanotubes, [23][24][25] and graphene, [26][27][28][29][30] present high surface areas, good electronic conductivities, and chemical stabilities. The other approach is pseudocapacitor, in which faradic processes are generated due to electroactive species (Figure 1b). The active materials in the electroactive species contain hydroxides, transition metal oxides, and conducting polymers. [31][32][33][34] Specifically, conducting polymers present high specific capacitance; however, their weaknesses are of high cost and poor cycling stability roots in their low conductivity. Beyond that, pseudocapacitive transition metal oxides serve as admirable supercapacitor electrodes. [35][36][37] Nonetheless, the poor cycling life and low energy density impose restrictions on their practical applications, especially for two electrode supercapacitor thus encouraged us to design new electrode materials from these pseudocapacitive metal oxides. In the meanwhile, the comprehensiveness of transition metal oxides/hydroxides and carbon-based materials led to high quality of performance and arose significant attention. [34,38,39] For example, on account of the superior pseudocapacitive performance, RuO 2 has attracted increasing attention, although it exhibits a limitation in practical applications due to its high cost. [40,41] Due to the fact, RuO 2 ·xH 2 O/carbon nanofiber composites obtained by Pico et al. present high specific capacitance and long cycle life. [42] Typically, for high-performance SCs, hollow structures were investigated to increase their active surface areas and porosity for efficient transportation. [43][44][45] In addition, hollow micro/nanostructured materials have proven their valuable applications in energy storage system (Li-ion batteries [46][47][48][49][50] and SCs [51][52][53][54] ) resulting from their shell functionality [55] and novel interior geometry. Especially, the hollow nanostructure presents a competent link between electrode materials and the electrolyte, which also can improve the electrochemical performance. [56] The hollow structure also possesses far more cavities, which works as an ''ion reservoir'' and ample room, in favor of lattice expansion. [57,58] So far, it is common to obtain hollow structures via template-method and water/oil/water (W/O/W) Electrochemical capacitors (supercapacitors, SCs), have been deemed to be one of the most promising powerful electrochemical energy storage devices, owing to that SCs have long cycle lives, high power densities, and fast recharge capabilities. Transition metal oxid...

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Temperature-dependent electrochemical capacitive performance of the α-Fe2O3 hollow nanoshuttles as supercapacitor electrodes

Cited by 98 publications

References 29 publications

Stepwise Splitting Growth and Pseudocapacitive Properties of Hierarchical Three-Dimensional Co3O4 Nanobooks

Stepwise Splitting Growth and Pseudocapacitive Properties of Hierarchical Three-Dimensional Co3O4 Nanobooks

Shape engineered three dimensional α-Fe₂ O₃ -activated carbon nano composite as enhanced electrochemical supercapacitor electrode material

Hollow Structural Transition Metal Oxide for Advanced Supercapacitors

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Temperature-dependent electrochemical capacitive performance of the α-Fe2O3 hollow nanoshuttles as supercapacitor electrodes

Cited by 98 publications

References 29 publications

Stepwise Splitting Growth and Pseudocapacitive Properties of Hierarchical Three-Dimensional Co3O4 Nanobooks

Stepwise Splitting Growth and Pseudocapacitive Properties of Hierarchical Three-Dimensional Co3O4 Nanobooks

Shape engineered three dimensional α-Fe2 O3 -activated carbon nano composite as enhanced electrochemical supercapacitor electrode material

Hollow Structural Transition Metal Oxide for Advanced Supercapacitors

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Shape engineered three dimensional α-Fe₂ O₃ -activated carbon nano composite as enhanced electrochemical supercapacitor electrode material