Preparation and electrochemical performance of novel ruthenium–manganese oxide electrode materials for electrochemical capacitors

Wen, Jianguo; Ruan, Xiangyuan; Zhou, Zongke

doi:10.1016/j.jpcs.2009.03.015

Cited by 40 publications

(26 citation statements)

References 16 publications

(23 reference statements)

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“…200 Increasing the annealing temperature can result in a lack of chemically bound water, inhibiting proton intercalation and leading to a decrease in specific capacitance. 203,204 (3) The crystallinity of RuO 2 ÁxH 2 O. The pseudocapacitance of RuO 2 ÁxH 2 O materials is also closely related to the degree of crystallinity.…”

Section: Sugimoto Et Almentioning

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: Sugimoto Et Almentioning

confidence: 99%

A review of electrode materials for electrochemical supercapacitors

2012

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“…Also, a significant reduction in the diameter of the semicircle with increase in Ru content is observed in the order of Li–MnO 2 >Li–Mn 0.95 Ru 0.5 O 2 >Li–Mn 0.9 Ru 0.1 O 2 , which demonstrates a decrease in the R ct with respect to the increase in Ru content. As all the studied nanocomposites have almost identical surface areas (Figure 5), the reduction in the diameter of the semicircles is prominently due to the improvement of the electronic conductivity with increasing Ru content rather than the enhancement of ionic transport 52. For all these nanocomposites, this semicircle is followed by an inclined line in the low‐frequency region reflecting Warburg impedance.…”

Section: Resultsmentioning

confidence: 86%

“…All the EIS plots show partially overlapping semicircles at high to medium frequencies and a line at low frequencies. This semicircle reflects the resistance of the solution or electrolyte ( R e ) and the charge‐transfer resistance ( R ct ) 52. The R e values of the Li–Mn 0.95 Ru 0.05 O 2 and Li–Mn 0.9 Ru 0.1 O 2 are much smaller than that of Li–MnO 2 nanocomposite, thereby indicating the beneficial role of the Ru substituent in diminishing the electrolyte resistance.…”

Section: Resultsmentioning

confidence: 99%

Composition‐Tailored 2 D Mn_1−xRu_xO₂ Nanosheets and Their Reassembled Nanocomposites: Improvement of Electrode Performance upon Ru Substitution

Kim

Patil

et al. 2014

Chemistry A European J

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Composition-tailored Mn1-x Rux O2 2 D nanosheets and their reassembled nanocomposites with mesoporous stacking structure are synthesized by a soft-chemical exfoliation reaction and the subsequent reassembling of the exfoliated nanosheets with Li(+) cations, respectively. The tailoring of the chemical compositions of the exfoliated Mn1-x Rux O2 2 D nanosheets and their lithiated nanocomposites can be achieved by adopting the Ru-substituted layered manganese oxides as host materials for exfoliation reaction. Upon the exfoliation-reassembling process, the substituted ruthenium ions remain stabilized in the layered Mn1-x Rux O2 lattice with mixed Ru(3+) /Ru(4+) oxidation state. The reassembled Li-Mn1-x Rux O2 nanocomposites show promising pseudocapacitance performance with large specific capacitances of approximately 330 F g(-1) for the second cycle and approximately 360 F g(-1) for the 500th cycle and excellent cyclability, which are superior to those of the unsubstituted Li-MnO2 homologue and many other MnO2 -based materials. Electrochemical impedance spectroscopy analysis provides strong evidence for the enhancement of the electrical conductivity of 2 D nanostructured manganese oxide upon Ru substitution, which is mainly responsible for the excellent electrode performance of Li-Mn1-x Rux O2 nanocomposites. The results underscore the powerful role of the composition-controllable metal oxide 2 D nanosheets as building blocks for exploring efficient electrode materials.

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“…The Csp of the electrodes increases with the broadened potential window. The increase in capacitance at broader windows is attributed to the presence of inner active sites, which can involve in the redox transitions completely, probably due to the diffusion effect of proton within the electrode [10]. The increasing trend of the capacitance suggests that the parts of the surface of electrode are accessible at high charging-discharging rate.…”

Section: Electrochemical Propertiesmentioning

confidence: 96%

“…EDLC is a small part of whole capacitance, on the other hand pseudocapacitance is a large part of it. The EDLC occurs in porous active carbon/fiber with very high specific surface area [3], whereas the pseudocapacitance is observed in transition metal oxides [4,5] (RuO 2 [4][5][6][7][8][9][10], IrO 2 , MnO 2 [10][11][12][13][14], Co 3 O 4 [15][16][17], NiO [18,19], SnO 2 [9] etc.) and conducting polymers [5].…”

Section: Introductionmentioning

confidence: 99%

Poorly Crystalline Ru0.4Sn0.6O2 Nanocomposites Coated on Ti Substrate with High Pseudocapacitance for Electrochemical Supercapacitors

Shao¹,

Lu²,

Deng³

et al. 2012

ACES

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Poorly crystalline Ru 0.4 Sn 0.6 O 2 solid solution with size about 2 nm coated on Ti substrate was prepared by thermal decomposition at 260˚C. The electrodes were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) for structural and morphological studies. The Capacitance properties of the electrodes were tested by cyclic voltammetry and charge-discharge tests. The results show that the electrodes have mud-cracks structure with cracks 0.2 µm in width. The electrode has stable electrochemical capacitor properties with a maximum specific capacitance of 648 F/g within a scan potential window -0.1 -1.0 V in 0.5 M H 2 SO 4 electrolyte solution.

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Preparation and electrochemical performance of novel ruthenium–manganese oxide electrode materials for electrochemical capacitors

Cited by 40 publications

References 16 publications

A review of electrode materials for electrochemical supercapacitors

A review of electrode materials for electrochemical supercapacitors

Composition‐Tailored 2 D Mn_1−xRu_xO₂ Nanosheets and Their Reassembled Nanocomposites: Improvement of Electrode Performance upon Ru Substitution

Poorly Crystalline Ru<sub>0.4</sub>Sn<sub>0.6</sub>O<sub>2</sub> Nanocomposites Coated on Ti Substrate with High Pseudocapacitance for Electrochemical Supercapacitors

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Preparation and electrochemical performance of novel ruthenium–manganese oxide electrode materials for electrochemical capacitors

Cited by 40 publications

References 16 publications

A review of electrode materials for electrochemical supercapacitors

A review of electrode materials for electrochemical supercapacitors

Composition‐Tailored 2 D Mn1−xRuxO2 Nanosheets and Their Reassembled Nanocomposites: Improvement of Electrode Performance upon Ru Substitution

Poorly Crystalline Ru&lt;sub&gt;0.4&lt;/sub&gt;Sn&lt;sub&gt;0.6&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt; Nanocomposites Coated on Ti Substrate with High Pseudocapacitance for Electrochemical Supercapacitors

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Composition‐Tailored 2 D Mn_1−xRu_xO₂ Nanosheets and Their Reassembled Nanocomposites: Improvement of Electrode Performance upon Ru Substitution

Poorly Crystalline Ru<sub>0.4</sub>Sn<sub>0.6</sub>O<sub>2</sub> Nanocomposites Coated on Ti Substrate with High Pseudocapacitance for Electrochemical Supercapacitors