Fabrication of porous nanosheet-based Co 3 O 4 hollow nanocubes for electrochemical capacitors with high rate capability

Zhao, Changhui; Huang, Baoyu; Fu, Wenbin; Chen, Jiayi; Zhou, Jinyuan; Xie, Erqing

doi:10.1016/j.electacta.2015.08.057

Cited by 45 publications

(18 citation statements)

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“…Insight from the research, the bulk reported hollow Co 3 O 4 provided the basis of hard templating method. This way lends support to the synthesis of well‐defined hierarchical Co 3 O 4 hollow nanocubes with uniform porous structures using Cu 2 O template‐assisted method by Zhao et al, which is combining a postcalcination process in air . Their hollow interior structures can be directly seen from Figure d.…”

Section: Aosupporting

confidence: 58%

Section: Aboxmentioning

confidence: 99%

“…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%

See 2 more Smart Citations

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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Section: Aosupporting

confidence: 58%

Section: Aboxmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hollow Structural Transition Metal Oxide for Advanced Supercapacitors

Wei

Xue

et al. 2018

Adv Materials Inter

View full text Add to dashboard Cite

show abstract

“…However, its high-cost and toxicity has made it difficult to find a commercial potential. Hence, alternative inorganic electrode materials including manganese oxide [3], cobalt oxide [4], copper oxide [5], nickel oxide [6] vanadium oxide [7], tungsten oxide [8], iron oxide [9] etc., have intensively been investigated, owing to their readily available, chemically stable, mechanically robust, safe, environmental friendly, and remarkably high performances in SC application [10][11][12]. The SC value of metal oxide can be enhanced, in general, by doping carbon nanotubes, graphene, polymers [13] etc., and in particular, mixing metal oxides of high catalytic activities [14].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and electrochemical supercapacitive performance of nickel–manganese ferrite composite films

Zate

Shaikh

Jadhav

et al. 2015

Journal of Analytical and Applied Pyrolysis

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“…In the past few decades, much attentions has been directed to the control synthesis of well-aligned ␣-Fe 2 O 3 with various morphology, such as nanorods [25], nanowires [26], nanotubes [27], nanobelts [28], as well as hierarchical structures and porous structure [29,30]. Until now, to the knowledge of the authors, although some hierarchical or hollow Co 3 O 4 nanomaterials have been prepared [31,32], the hollowed-out hierarchical ␣-Fe 2 O 3 nanorods that assembled by interlaced ultrathin nanosheets (with thickness of around 3 nm) have been rarely reported.…”

Section: Introductionmentioning

confidence: 98%