Materials and fabrication of electrode scaffolds for deposition of MnO2 and their true performance in supercapacitors

Cao, Jianyun; Li, Xiaohong; Wang, Yaming; Walsh, Frank C.; Ouyang, Jia‐Hu; Jia, Dechang; Zhou, Yu

doi:10.1016/j.jpowsour.2015.05.115

Cited by 97 publications

(45 citation statements)

References 260 publications

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“…The second-to-minute regime is where supercapacitors thrive, although such devices are currently impeded from larger market adoption due to low energy density [78][79][80]. As such, much research in the past 15 years has been focused on improving the energy density of supercapacitors; the bulk of these endeavours have been directed towards pseudocapacitive materials such as RuO 2 or MnO 2 [81,82]. The pseudocapacitors are supercapacitors, which undergo both surface and bulk reactions.…”

Section: Supercapacitor Mno 2 In Supercapacitormentioning

confidence: 99%

A review on mechanistic understanding of MnO₂in aqueous electrolyte for electrical energy storage systems

Shin

Seo

Yaylian

et al. 2019

International Materials Reviews

152

122

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The demand for the large-scale storage system has gained much interest. Among all the criteria for the large-scale electrical energy storage systems (EESSs), low cost ($ k Wh −1) is the focus where MnO 2-based electrochemistry can be a competitive candidate. It is notable that MnO 2 is one of the few materials that can be employed in various fields of EESSs: alkaline battery, supercapacitor, aqueous rechargeable lithium-ion battery, and metal-air battery. Yet, the technology still has bottlenecks and is short of commercialisation. Discovering key parameters impacting the energy storage and developing systematic characterisation methods for the MnO 2 systems can benefit a wide spectrum of energy requirements. In this review, history, mechanism, bottlenecks, and solutions for using MnO 2 in the four EESSs are summarised and future directions involving more in-depth mechanism studies are suggested.

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Section: Supercapacitor Mno 2 In Supercapacitormentioning

confidence: 99%

A review on mechanistic understanding of MnO₂in aqueous electrolyte for electrical energy storage systems

Shin

Seo

Yaylian

et al. 2019

International Materials Reviews

152

122

View full text Add to dashboard Cite

show abstract

“…Manganese dioxide, deposited in various ways on RVC and other carbon supports, has been considered for competitive use in supercapacitors [119]. For instance, 0.2-0.5 cm 3 blocks of 20 ppi RVC were used as a substrate for electrodeposition of thin layers of Pd and Pd-rich Pd-Rh alloys [120].…”

Section: Supercapacitorsmentioning

confidence: 99%

The continued development of reticulated vitreous carbon as a versatile electrode material: Structure, properties and applications

Walsh

Arenas

León

et al. 2016

Electrochimica Acta

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The limitations of 2-dimensional electrodes can be overcome by using threedimensional materials having sufficient porosity and active area while offering moderate mass transport rates and a relatively low pressure drop at controlled electrolyte flow rate. In concept, a wide variety of metal, ceramic and composite materials are possible but restrictions are imposed by the need to avoid materials degradation, while maintaining adequate electrical conductivity, sufficient robustness and the possibility of facile scale-up. Despite its fragility, one of the traditional electrode materials used as a porous, 3-dimensional electrode is carbon foam, particularly in the 97% vol. porous form of reticulated vitreous carbon, RVC. A timeline indicates that the history of this material dates back over 50 years to the mid1960s, when it was primarily used as an uncoated material in small-scale, laboratory electroanalysis. Surface modification and diverse coatings have considerably extended the use of RVC. Recent applications are found in sensors and monitors, electrosynthesis, environmental processing and energy conversion. This review highlights the fundamental structure and summarises the physicochemical properties of RVC. Fluid flow through various porosity grades of the material, their active electrochemical area and rates of mass transport are quantified. The diverse applications of RVC in energy conversion, environmental treatment and electrosynthesis are illustrated by selected examples from the authors' laboratories and others over the last 30 years. Recent research on coated RVC, energy conversion environmental remediation and sensors is highlighted. Critical areas deserving further research and development are proposed.

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“…[ 28,34,35 ] However, due to its highly resistive nature (10 −5 to 10 −6 S cm −1 ), the most developed pristine MnO 2 merely delivers a practical capacitance about 200–600 F g −1 , even at a substantially low mass loading. [ 19,36,37 ] Such unsatisfactory capacitance should be assigned to the sluggish electron/ion transportation in materials or at the electrode/electrolyte interface. [ 19,38 ] Besides, a significant portion of energy would be inevitably lost due to their large internal resistance, and the resultant SCs thus usually show poor rate capability.…”

Section: Introductionmentioning

confidence: 99%

Oxygen Defects in Promoting the Electrochemical Performance of Metal Oxides for Supercapacitors: Recent Advances and Challenges

et al. 2020

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and considered as indispensable energy storage devices because of their higher power density and greater life expectancy compared with their competitive counterparts such as batteries, fuel cells, and conventional capacitors. Significantly, owing to their distinct advantages including the simple and safe configuration, quick charge/discharge response, large power output, and long operating life (>100 000 cycles), SCs show a promising prospect in next-generation energy technologies, like smart and wearable electronics, quick charging cellphones, regenerative braking electric motors, and instant management of industrial power and energy. [20][21][22][23][24] Currently, there are three main categories of active materials employed to advance the electrochemical performance of SCs: i) carbonaceous matrix, ii) conducting polymers, and iii) metal oxides (MOs). With respect to the former two types, MOs, especially transition MOs, usually delivers a much higher specific capacitance, as their unique crystal structure, combined with the multiple oxidation states of metal ions, are both in favor of excellent charge storage capability. Sometimes, SCs assembled with MOs are also called pseudocapacitors (PCs), because different from carbon-based electrical double layer capacitors (EDLCs), they realize the charge storage via fast Faradaic redox and/or metal ion intercalation reactions. In this way, they could deliver substantially superior specific capacitances as high as 300-1200 F g −1 and offer 10-100 times larger energy density than that of EDLCs. [25][26][27][28][29] In recent years, various MO materials have been proposed as high-performance SCs electrodes, some of which the theoretical capacitances and common operating potential windows are summarized in Figure 1a,b. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Nevertheless, further practical applications of these SCs are severely hindered by the poor electrical conductivity and frustrating structural stability of semiconductive MOs. To address these issues, owing to the rapid advancement of nanotechnology, a series of nano-and meso-scale morphological engineering strategies have been proposed to boost the electrochemical performance of MOs, either by enlarging the electrochemical active surface area or by shortening the diffusion length of electrons/ions. [30][31][32] For instance, combining MOs with some other highly conductive substances such as carbonaceous materials and metals is validated to be a feasible Metal oxides (MOs) with multiple active sites are regarded as one of the most potential active materials for high-performance supercapacitor (SC) constructions. Engineering oxygen vacancies into MOs can effectively modulate their electronic properties, subtly induce impurity states in their bandgaps, and considerably optimize their electrical conductivity. Benefiting from these advantageous properties, the resultant oxygen-defective electrodes generally embed more electrochemical active sites and present better charge storage capability in co...

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Materials and fabrication of electrode scaffolds for deposition of MnO2 and their true performance in supercapacitors

Cited by 97 publications

References 260 publications

A review on mechanistic understanding of MnO₂in aqueous electrolyte for electrical energy storage systems

A review on mechanistic understanding of MnO₂in aqueous electrolyte for electrical energy storage systems

The continued development of reticulated vitreous carbon as a versatile electrode material: Structure, properties and applications

Oxygen Defects in Promoting the Electrochemical Performance of Metal Oxides for Supercapacitors: Recent Advances and Challenges

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Materials and fabrication of electrode scaffolds for deposition of MnO2 and their true performance in supercapacitors

Cited by 97 publications

References 260 publications

A review on mechanistic understanding of MnO2in aqueous electrolyte for electrical energy storage systems

A review on mechanistic understanding of MnO2in aqueous electrolyte for electrical energy storage systems

The continued development of reticulated vitreous carbon as a versatile electrode material: Structure, properties and applications

Oxygen Defects in Promoting the Electrochemical Performance of Metal Oxides for Supercapacitors: Recent Advances and Challenges

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A review on mechanistic understanding of MnO₂in aqueous electrolyte for electrical energy storage systems

A review on mechanistic understanding of MnO₂in aqueous electrolyte for electrical energy storage systems