Carbon alternative pseudocapacitive V2O5 nanobricks and δ-MnO2 nanoflakes @ α‐MnO2 nanowires hetero-phase for high-energy pseudocapacitor

Patil, Swati J.; Chodankar, Nilesh R.; Han, Young‐Kyu; Lee, Dong Weon

doi:10.1016/j.jpowsour.2020.227766

Cited by 51 publications

(21 citation statements)

References 41 publications

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“…, where c and v are a constant and sweep scanning rates of CV curves, respectively. 8,9,18 Figure S5 indicates that the charge storage of PPMMn (10) electrodes is mainly due to a capacitive contribution.…”

Section: Resultsmentioning

confidence: 99%

“…The capacitive and diffusion-controlled contributions of PPMMn (10) electrodes at low CV scan rates are shown in Figure S5. The total charge storage capacity ( Q t ) was estimated from the contributions of surface capacities ( Q s ) and diffusion-controlled bulk redox reactions ( Q d ) as follows: Q t = Q s + cv –1/2 , where c and v are a constant and sweep scanning rates of CV curves, respectively. ,, Figure S5 indicates that the charge storage of PPMMn (10) electrodes is mainly due to a capacitive contribution.…”

Section: Resultsmentioning

confidence: 99%

“…For the development and use of efficient energy resources, interest in the development of energy storage devices having high energy and power densities is increasing. , Among the various energy storage systems, electrochemical capacitors provide a high power density, fast charge/discharge rate, and long stability. , Recently, developments on advanced electrochemical capacitors with high capacity performances have focused on new active electrode materials such as metal oxide/carbon capacitors with both double-layer capacitance and pseudocapacitance. − In particular, MnO 2 /carbon nanofibers (CNFs) have attracted much attention as electrode materials due to their environmentally friendly properties, low manufacturing costs, and the high theoretical capacitance of MnO 2 . − Hybridization of MnO 2 and CNFs enhances electrochemical storage capacities due to the synergism between the pseudocapacitance of MnO 2 and the electric double-layer capacitance of CNFs. However, MnO 2 nanoparticles tend to block the surface pores of CNFs, resulting in low capacitance and insufficient energy density due to high internal resistance.…”

Section: Introductionmentioning

confidence: 99%

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Studies on Tubular MnO₂-Core/Carbon Nanofiber-Shell Electrodes for Electrochemical Capacitors

Jeong

Lee

Kim

et al. 2021

ACS Appl. Energy Mater.

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The goal of this study is to design hollow carbon nanofibers containing MnO 2 (PPMMn), in which the pores of the carbon nanofiber surface are utilized for ion diffusion to facilitate rapid MnO 2 surface redox reactions. Electrochemical performance is optimized by controlling the growth of MnO 2 on the inner or outer surfaces of carbon nanofibers by varying MnCl 2 contents. Accessible specific surface areas and the hollow structure of PPMMn composites provide more active sites and internal spaces to enable electrolyte ion access. The energy storage capabilities of PPMMn in the assembled symmetrical supercapacitors provide excellent capacitive behavior with a maximum specific capacitance of 254 F g −1 , a maximum energy density of 32 Wh kg −1 , and longterm cycling stability (96% of the initial capacitance after 10,000 cycles). In addition, the cyclic voltammetry curves are nearly overlapped for the PPMMn electrode in a flat or bent state, and the PPMMn-based devices assembled in series successfully lit a commercial light-emitting diode. The study shows that PPMMn electrodes have excellent flexibilities and mechanical strengths and broad prospects in the energy storage field.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Studies on Tubular MnO₂-Core/Carbon Nanofiber-Shell Electrodes for Electrochemical Capacitors

Jeong

Lee

Kim

et al. 2021

ACS Appl. Energy Mater.

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“…Many synthesis strategies for the fabrication of VrG composites include a hydro/ solvothermal method. Typically, a mixture of V 2 O 5 precursors such as vanadium oxytriisopropoxide (VTIP), rGO precursors such as GO, and water or other solvents are heated at high temperatures and pressures for extended periods in a Teflon-lined stainless steel autoclave [53]. The hydro/solvothermal procedure is frequently used because it is facile and allows the formation of diverse V 2 O 5 morphologies on the 2D rGO substrate.…”

Section: Effects Of Synthesis Methodsmentioning

confidence: 99%

Recent Development in Vanadium Pentoxide and Carbon Hybrid Active Materials for Energy Storage Devices

et al. 2021

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With the increasing energy demand for portable electronics, electric vehicles, and green energy storage solutions, the development of high-performance supercapacitors has been at the forefront of energy storage and conversion research. In the past decade, many scientific publications have been dedicated to designing hybrid electrode materials composed of vanadium pentoxide (V2O5) and carbon nanomaterials to bridge the gap in energy and power of traditional batteries and capacitors. V2O5 is a promising electrode material owing to its natural abundance, nontoxicity, and high capacitive potential. However, bulk V2O5 is limited by poor conductivity, low porosity, and dissolution during charge/discharge cycles. To overcome the limitations of V2O5, many researchers have incorporated common carbon nanostructures such as reduced graphene oxides, carbon nanotubes, carbon nanofibers, and other carbon moieties into V2O5. The carbon components facilitate electron mobility and act as porous templates for V2O5 nucleation with an enhanced surface area as well as interconnected surface morphology and structural stability. This review discusses the development of various V2O5/carbon hybrid materials, focusing on the effects of different synthesis methods, V2O5/carbon compositions, and physical treatment strategies on the structure and electrochemical performance of the composite material as promising supercapacitor electrodes.

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“…Vanadium oxides are considered as ideal electrode materials for energy storage due to their multiple oxidation states from V 2+ to V 5+ , a high capacitance, wide potential window and low cost. [ 182 ] Various nanostructures of V 2 O 5 electrodes have been developed, including nanobrick, [ 183 ] nanofiber, [ 184 ] nanowire, [ 185 ] nanosheet, [ 186 ] nanopaper, [ 187 ] and nanoribbon. [ 188 ] Additionally, copper oxides/hydroxides like Cu 2 O, [ 189 ] Cu(OH) 2 , [ 190 ] and CuO [ 191 ] have captured attention as electrode materials for SC.…”

Section: Tmcs As Electrode Materials For Fs‐scsmentioning

confidence: 99%

Recent Development of Flexible and Stretchable Supercapacitors Using Transition Metal Compounds as Electrode Materials

Lyu

Antink

Kim

et al. 2021

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Flexible and stretchable supercapacitors (FS‐SCs) are promising energy storage devices for wearable electronics due to their versatile flexibility/stretchability, long cycle life, high power density, and safety. Transition metal compounds (TMCs) can deliver a high capacitance and energy density when applied as pseudocapacitive or battery‐like electrode materials owing to their large theoretical capacitance and faradaic charge‐storage mechanism. The recent development of TMCs (metal oxides/hydroxides, phosphides, sulfides, nitrides, and selenides) as electrode materials for FS‐SCs are discussed here. First, fundamental energy‐storage mechanisms of distinct TMCs, various flexible and stretchable substrates, and electrolytes for FS‐SCs are presented. Then, the electrochemical performance and features of TMC‐based electrodes for FS‐SCs are categorically analyzed. The gravimetric, areal, and volumetric energy density of SC using TMC electrodes are summarized in Ragone plots. More importantly, several recent design strategies for achieving high‐performance TMC‐based electrodes are highlighted, including material composition, current collector design, nanostructure design, doping/intercalation, defect engineering, phase control, valence tuning, and surface coating. Integrated systems that combine wearable electronics with FS‐SCs are introduced. Finally, a summary and outlook on TMCs as electrodes for FS‐SCs are provided.

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Carbon alternative pseudocapacitive V2O5 nanobricks and δ-MnO2 nanoflakes @ α‐MnO2 nanowires hetero-phase for high-energy pseudocapacitor

Cited by 51 publications

References 41 publications

Studies on Tubular MnO₂-Core/Carbon Nanofiber-Shell Electrodes for Electrochemical Capacitors

Studies on Tubular MnO₂-Core/Carbon Nanofiber-Shell Electrodes for Electrochemical Capacitors

Recent Development in Vanadium Pentoxide and Carbon Hybrid Active Materials for Energy Storage Devices

Recent Development of Flexible and Stretchable Supercapacitors Using Transition Metal Compounds as Electrode Materials

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Carbon alternative pseudocapacitive V2O5 nanobricks and δ-MnO2 nanoflakes @ α‐MnO2 nanowires hetero-phase for high-energy pseudocapacitor

Cited by 51 publications

References 41 publications

Studies on Tubular MnO2-Core/Carbon Nanofiber-Shell Electrodes for Electrochemical Capacitors

Studies on Tubular MnO2-Core/Carbon Nanofiber-Shell Electrodes for Electrochemical Capacitors

Recent Development in Vanadium Pentoxide and Carbon Hybrid Active Materials for Energy Storage Devices

Recent Development of Flexible and Stretchable Supercapacitors Using Transition Metal Compounds as Electrode Materials

Contact Info

Product

Resources

About

Studies on Tubular MnO₂-Core/Carbon Nanofiber-Shell Electrodes for Electrochemical Capacitors

Studies on Tubular MnO₂-Core/Carbon Nanofiber-Shell Electrodes for Electrochemical Capacitors