Effects of annealing on electrochemical performance in graphene/V2O5 supercapacitor

Lee, Seung‐Mo; Park, Yong-Jin; Lam, Do Van; Kim, Jae-Hyun; Lee, Kyubock

doi:10.1016/j.apsusc.2020.145626

Cited by 49 publications

(22 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In some cases such as V, this approach is unsuccessful due to the increased solubility of oxides developed in common electrolytes. Thus, efforts to fabricate nanotubular arrays on Ti–V alloys are undertaken because V 2 O 5 is one of the most favorable oxides for supercapacitor applications [ 205 ]. Yang et al [ 206 , 207 ] found that highly ordered MONs of V2O5–TiO2 NTs can be developed on Ti–V alloys with a vanadium content of up to 18 at% via electrochemical anodization.…”

Section: Comparison Between Mono and Mixed Oxide Nanotubesmentioning

confidence: 99%

Mixed oxide nanotubes in nanomedicine: A dead-end or a bridge to the future?

Sarraf

Yeong

Hosseini

et al. 2021

Ceramics International

View full text Add to dashboard Cite

Nanomedicine has seen a significant rise in the development of new research tools and clinically functional devices. In this regard, significant advances and new commercial applications are expected in the pharmaceutical and orthopedic industries. For advanced orthopedic implant technologies, appropriate nanoscale surface modifications are highly effective strategies and are widely studied in the literature for improving implant performance. It is well-established that implants with nanotubular surfaces show a drastic improvement in new bone creation and gene expression compared to implants without nanotopography. Nevertheless, the scientific and clinical understanding of mixed oxide nanotubes (MONs) and their potential applications, especially in biomedical applications are still in the early stages of development. This review aims to establish a credible platform for the current and future roles of MONs in nanomedicine, particularly in advanced orthopedic implants. We first introduce the concept of MONs and then discuss the preparation strategies. This is followed by a review of the recent advancement of MONs in biomedical applications, including mineralization abilities, biocompatibility, antibacterial activity, cell culture, and animal testing, as well as clinical possibilities. To conclude, we propose that the combination of nanotubular surface modification with incorporating sensor allows clinicians to precisely record patient data as a critical contributor to evidence-based medicine.

show abstract

Section: Comparison Between Mono and Mixed Oxide Nanotubesmentioning

confidence: 99%

Mixed oxide nanotubes in nanomedicine: A dead-end or a bridge to the future?

Sarraf

Yeong

Hosseini

et al. 2021

Ceramics International

View full text Add to dashboard Cite

show abstract

“…For EDLC, carbon has been the main electrode material for decades, [3−6] while the most used electrodes in pseudocapacitors are the transition metal oxides MnO2, [7] RuO2, [8] Fe2O3, [9] NiO, [10] and V2O5. [11] The metal oxides have shown promising results in the past years due to their high capacitance [12−14] compared to carbon. Although RuO2 presents great performance, its exploitation is limited due to its high price.…”

Section: Introductionmentioning

confidence: 99%

Co₃O₄ Nanoparticles Embedded in Mesoporous Carbon for Supercapacitor Applications

Zallouz

Réty

Vidal

et al. 2021

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Metal oxides are of great interest for supercapacitor application, however, they suffer from capacity fading during cycling and limited cycle life. In this work, a one-pot bottom-up approach is proposed to design cobalt oxide (Co3O4) nanoparticles confined in a mesoporous carbon. This involved the coassembly of a phenolic resin, a surfactant, and a cobalt salt followed by a high temperature pyrolysis (600−800 °C) and a subsequent low temperature oxidation (190−240 °C) step. Very small Co3O4 particle size (2.3−7.4 nm) could be achieved for high loadings of Co3O4 (up to 59%) in the carbon network. Both the pyrolysis and oxidation temperature increase led to an increase of nanoparticle size, porosity and electronic conductivity. At low temperatures, i.e., 600 and 650 °C, and despite the low particle size, the performances are poor and limited by the carbon low electronic conductivity. At high temperature (800 °C), the conductivity is improved translating in a higher capacitance, but the larger and more aggregated nanoparticles induced low rate capability. The best compromise to maintain high capacitance and rate capability was observed at 700 and 750 °C and thus for composite materials combining simultaneously dispersed nanoparticles, high porosity, and good electronic conductivity. In particular, the material treated at 750 °C presents, in a 2 electrode system using 2 M KOH, a capacitance of 54 F g −1 at 0.1 A g −1 , a very high rate capability of 48.7% at 10 A g −1 , and a superior rate performance of 82% after 10000 cycles.

show abstract

“…Despite the previously mentioned benefits of heat treatment, the annealing of VrG electrodes may decrease the electrical performance. Lee et al analyzed the discrepancy in the electrochemical performance of a non-annealed V 2 O 5 composite in comparison with an annealed composite, where an rGO thin film was fabricated from GO using CO 2 laser reduction, and V 2 O 5 was deposited on the film via atomic layer deposition [82]. The CO 2 laser changed the porosity of the compact GO by increasing the interstitial gap between the rGO sheets while creating pores that penetrated multiple rGO sheets.…”

Section: Effects Of Physical Treatmentmentioning

confidence: 99%

“…Then, the LrGO was coated with amorphous V 2 O 5 by a lowtemperature ALD process, followed by annealing at high temperatures. Reprinted with permission from Ref [82]…”

mentioning

confidence: 99%

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

et al. 2021

View full text Add to dashboard Cite

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.

show abstract

Effects of annealing on electrochemical performance in graphene/V2O5 supercapacitor

Cited by 49 publications

References 46 publications

Mixed oxide nanotubes in nanomedicine: A dead-end or a bridge to the future?

Mixed oxide nanotubes in nanomedicine: A dead-end or a bridge to the future?

Co₃O₄ Nanoparticles Embedded in Mesoporous Carbon for Supercapacitor Applications

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

Contact Info

Product

Resources

About

Effects of annealing on electrochemical performance in graphene/V2O5 supercapacitor

Cited by 49 publications

References 46 publications

Mixed oxide nanotubes in nanomedicine: A dead-end or a bridge to the future?

Mixed oxide nanotubes in nanomedicine: A dead-end or a bridge to the future?

Co3O4 Nanoparticles Embedded in Mesoporous Carbon for Supercapacitor Applications

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

Contact Info

Product

Resources

About

Co₃O₄ Nanoparticles Embedded in Mesoporous Carbon for Supercapacitor Applications