Preparation and properties of Co3O4 nanorods as supercapacitor material

Cui, Li; Li, Juan; Zhang, Xiaogang

doi:10.1007/s10800-009-9891-5

Cited by 158 publications

(81 citation statements)

References 27 publications

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“…However, in normal cases, the plot shows a line with the inclined angle between 451 and 901 against the real axis, corresponding to the ion diffusion mechanism between Warburg diffusion and ideal capacitive ion diffusion (pseudo capacitance). 36,37 This deviation from the parallel line may be attributed to two reasons: one is the different penetration depth of the alternating current signal in virtue of pore size distribution at both electrodes, leading to abnormal capacitance, the other is the redox reaction at the electrode, giving rise to pseudocapacitance. 35,38 2.6 Advantages, challenges, and applications of ES 2.6.1 Advantages of ES.…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

A review of electrode materials for electrochemical supercapacitors

2012

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Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/view/object/?id=72117dd4-3024-4aa6-be53-472cfb3e5a2a http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/voir/objet/?id=72117dd4-3024-4aa6-be53-472cfb3e5a2a In this critical review, metal oxides-based materials for electrochemical supercapacitor (ES) electrodes are reviewed in detail together with a brief review of carbon materials and conducting polymers. Their advantages, disadvantages, and performance in ES electrodes are discussed through extensive analysis of the literature, and new trends in material development are also reviewed. Two important future research directions are indicated and summarized, based on results published in the literature: the development of composite and nanostructured ES materials to overcome the major challenge posed by the low energy density of ES (476 references).

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Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

A review of electrode materials for electrochemical supercapacitors

2012

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“…Therefore, much research is devoted to the synthesis of Co 3 O 4 nanostructures and to the control of their microstructure. Recent reports have proved that Co 3 O 4 with special microstructure and morphology displayed excellent electrochemical capacitive behavior [15][16][17][18][19][20][21][22][23]. For example, a specific capacitance of 227 F g -1 for hexagonal Co 3 O 4 nanosheets was reached through a complex-precursor solution procedure and sequential thermal decomposition at atmospheric pressure [15].…”

Section: Introductionmentioning

confidence: 99%

“…They exhibited a specific capacitance of 102 F g -1 at a sweep rate of 3 mV s -1 [16]. Single crystal Co 3 O 4 nanorods, which were used as electroactive materials for the supercapacitor, exhibited a high capacitance of 456 F g -1 [17]. The specific capacitance of Co 3 O 4 thin films deposited on glass substrate by spray pyrolysis is 74 F g -1 [18], whereas its value for thin films prepared via electrochemical precipitation could reach 164 F g -1 [19].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical preparation and properties of nanostructured Co3O4 as supercapacitor material

Aghazadeh¹

2012

J Appl Electrochem

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Nanostructured Co 3 O 4 was prepared via a simple two-step process: cathodic electrodeposition of cobalt hydroxide from additive free nitrate bath and then heat treatment at 400°C for 3 h. The prepared oxide product was characterized by powder X-ray diffraction, infrared spectroscopy, surface area measurement, scanning electron microscopy, and transmission electron microscopy. Morphological characterization showed that the oxide product was composed of porous nanoplates, and BET measurement displayed that the oxide plates have the average pore diameter and the surface area of 4.75 nm and 208.5 m 2 g -1 , respectively. The supercapacitive performance of the nanoplates was evaluated using cyclic voltammetry and charge-discharge tests. A specific capacitance as high as 393.6 F g -1 at the constant current density of 1 A g -1 and an excellent capacity retention (96.5% after 500 charge-discharge cycles) was obtained. These results indicate that Co 3 O 4 nanoplates can be recognized as high-performance electrode materials.

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“…Therefore, one can build the electrochemical supercapacitors, which have the advantages of both of electric double layer capacitors (EDLCs) and redox pseudocapacitors [16,17]. Considering the low cost and excellent capacitance, the cobalt compounds have been widely used as electrode materials [18,19]. And as we know, a-Co(OH) 2 and b-Co(OH) 2 are two different crystal structures of Co(OH) 2 compounds, and the former has attracted much attention for its outstanding electrochemical performance [18,20,21].…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of coke powder activated carbon/α-Co(OH)2 composite electrode materials

Luo

Zhang

Zhao

et al. 2013

J Mater Sci: Mater Electron

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Coke powder activated carbon (CPAC) was prepared by dipping-calcined KOH activation method. Using CPAC as the raw material a series of composite electrode materials of CPAC/a-Co(OH) 2 with different mass fractions of cobalt were synthesized by the Sol-gel method. The physical properties of the resulting samples were characterized by the field emission scanning electron microscopy and the X-ray diffraction. The results show that composite materials, CPAC/a-Co(OH) 2 , have a flower-like structure. The results of electrochemical performances show that the composite material has a good electrochemical capacity of 472.3 F g -1 with a cobalt doping amount of 30 wt %. By the cyclic voltammetry testing, we found that the anodic peak potential of the redox peaks in composite electrode materials shifted positively when the scan rate increased, while the cathodic peak potential shifted negatively, and that would cause a gradual increase of the peak potential difference of redox peaks. In contrast, the lower of the scan rate, the smaller of the peak potential difference and the better of the reversibility of composite material. The results of impedance testing show that CPAC/a-Co(OH) 2 has a lower electrochemical impedance than that of CPAC.

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Preparation and properties of Co3O4 nanorods as supercapacitor material

Cited by 158 publications

References 27 publications

A review of electrode materials for electrochemical supercapacitors

A review of electrode materials for electrochemical supercapacitors

Electrochemical preparation and properties of nanostructured Co3O4 as supercapacitor material

Preparation and properties of coke powder activated carbon/α-Co(OH)2 composite electrode materials

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