Quantitative investigation on the effect of hydrogenation on the performance of MnO<sub>2</sub>/H-TiO<sub>2</sub> composite electrodes for supercapacitors

Cao, Xiaoran; Xing, Xuteng; Zhang, N.; Gao, Hong; Zhang, M. Y.; Shang, Yu; Zhang, X. T.

doi:10.1039/c4ta06138a

Cited by 37 publications

(21 citation statements)

References 43 publications

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“…In addition, both slower ionic transport in solid electrolytes and the tubular nature of CuOHNTs contribute to the deviation of the voltammograms from its ideal oxidation–reduction appearance. A similar appearance is also reported by Cao et al 38. The synchronization effect of the MnO 2 -coated tubular nanostructure enables the assembled supercapacitor to deliver a capacitance of 67.78 mF cm −2 at 5 mV s −1 .…”

Section: Resultssupporting

confidence: 86%

Wearable energy-smart ribbons for synchronous energy harvest and storage

et al. 2016

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A promising energy source for many current and future applications is a ribbon-like device that could simultaneously harvest and store energy. Due to the high flexibility and weavable property, a fabric/matrix made using these ribbons could be highly beneficial for powering wearable electronics. Unlike the approach of using two separate devices, here we report a ribbon that integrates a solar cell and a supercapacitor. The electrons generated by the solar cell are directly transferred and stored on the reverse side of its electrode which in turn also functions as an electrode for the supercapacitor. When the flexible solar ribbon is illuminated with simulated solar light, the supercapacitor holds an energy density of 1.15 mWh cm−3 and a power density of 243 mW cm−3. Moreover, these ribbons are successfully woven into a fabric form. Our all-solid-state ribbon unveils a highly flexible and portable self-sufficient energy system with potential applications in wearables, drones and electric vehicles.

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Section: Resultssupporting

confidence: 86%

Wearable energy-smart ribbons for synchronous energy harvest and storage

et al. 2016

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“…To quantitatively investigate the physical mechanism for improving the electrical conductivity of GaNMM, we measured the Mott–Schottky (M–S) plots as shown in Figure d. As expected, the line sections of the plot exhibit a positive slope, indicating the n‐type semiconductor feature . According to the M–S equation (Equation (8) in the Supporting Information), the dielectric constant ε is 9 for GaN, and the flat band potential ( U fb ) is −0.86 V according to the M–S plot.…”

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confidence: 91%

Gallium Nitride Crystals: Novel Supercapacitor Electrode Materials

et al. 2016

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“…As the novel devices for energy storage, supercapacitors distinguish from other types of electrochemical energy storage by their advantages of short charging times, good reversibility, high power density, and long cycle life, which have attracted increasing attention in past decades. 4,5 Thus, a number of current studies have been focused on PCs. 3 In particularly, capacitance of PCs arises from the fast reversible Faradic redox reactions at the electrode surface, thus PCs usually provide much higher specific capacitance than supercapacitors made of carbonaceous materials based on electric double-layer charge storage.…”

Section: Introductionmentioning

confidence: 99%

Rationally designed hierarchical ZnCo₂O₄/polypyrrole nanostructures for high-performance supercapacitor electrodes

Chen

Wang

et al. 2015

RSC Adv.

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Electrodes with rationally designed hybrid nanostructures can offer many opportunities for the enhanced performance in electrochemical energy storage. In this work, hierarchical ZnCo 2 O 4 /Polypyrrole (PPy) nanostructures on Ni foam were rationally designed and successfully fabricated through a facile two-step method and were directly used as an integrated electrode for supercapacitors. The novel nanoscale morphology has been proven to be responsible for their excellent capacitive performances. When used as electrodes in supercapacitors, the hybrid nanostructures demonstrated prominent electrochemical performances with a high specific capacitance (1559 F/g at a current density of 2 mA/cm 2 ), a good rate capability (89% when the current density increases from 2 to 20 mA/cm 2 ), and a good cycling ability (90% of the initial specific capacitance remained after 5000 cycles at a high current density of 10 mA/cm 2 ). Moreover, the high specific energy density is 30.9 Wh/kg at a current density of 2 mA/cm 2 in a two-electrode system. The excellent electrochemical performance of hierarchical ZnCo 2 O 4 /PPy nanostructures can be mainly ascribed to the enhanced adherent force between electrode materials and Ni foam to hold the electrode fragments together by means of ZnCo 2 O 4 nanowires, the good electrical conductivity of PPy, the short ion diffusion pathway in ordered porous PPy nanofilms and ZnCo 2 O 4 nanowires.*Corresponding author E-mails: fyzf318@163.com † Electronic supplementary information (ESI) available: (Fig. S1) SEM and TEM images, and (Fig. S2) mapping images of hybrid nanostructures; The CV curves and GCD curves of PPy and ZnCo 2 O 4 (Fig. S3); GCD curves of the PPy, ZnCo 2 O 4 , and ZnCo 2 O 4 /PPy (Fig. S4); The data of Specific capacitance (Table S1); The CV curves and GCD curves of PPy and ZnCo 2 O 4 in a two electrode system (Fig. S5).

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Quantitative investigation on the effect of hydrogenation on the performance of MnO₂/H-TiO₂ composite electrodes for supercapacitors

Abstract: Based on the Mott–Schottky theory, the electron concentration of the as-synthesized nanostructures can be calculated by M–S plot.

Cited by 37 publications

References 43 publications

Wearable energy-smart ribbons for synchronous energy harvest and storage

Wearable energy-smart ribbons for synchronous energy harvest and storage

Gallium Nitride Crystals: Novel Supercapacitor Electrode Materials

Rationally designed hierarchical ZnCo₂O₄/polypyrrole nanostructures for high-performance supercapacitor electrodes

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Quantitative investigation on the effect of hydrogenation on the performance of MnO2/H-TiO2 composite electrodes for supercapacitors

Abstract: Based on the Mott–Schottky theory, the electron concentration of the as-synthesized nanostructures can be calculated by M–S plot.

Cited by 37 publications

References 43 publications

Wearable energy-smart ribbons for synchronous energy harvest and storage

Wearable energy-smart ribbons for synchronous energy harvest and storage

Gallium Nitride Crystals: Novel Supercapacitor Electrode Materials

Rationally designed hierarchical ZnCo2O4/polypyrrole nanostructures for high-performance supercapacitor electrodes

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Product

Resources

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Quantitative investigation on the effect of hydrogenation on the performance of MnO₂/H-TiO₂ composite electrodes for supercapacitors

Rationally designed hierarchical ZnCo₂O₄/polypyrrole nanostructures for high-performance supercapacitor electrodes