Pt-nanoparticle functionalized carbon nano-onions for ultra-high energy supercapacitors and enhanced field emission behaviour

Suryawanshi, Sachin R.; Kaware, Vaibhav; Chakravarty, Disha; Walke, Pravin S.; More, Mahendra A.; Joshi, Kavita; Rout, Chandra Sekhar; Late, Dattatray J.

doi:10.1039/c5ra12364j

Cited by 52 publications

(23 citation statements)

References 65 publications

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“…Many experimental facts have proved that carbon coating is one of the most commonly used techniques for improving the performance of electrode materials . Zheng et al favorably synthesized V 2 O 3 @AC core–shell composites, with a unique structure of high specific surface area (83.2 m 2 g −1 ) via heat treatment.…”

Section: Amorphous Carbon‐based Materialsmentioning

confidence: 99%

Recent Progress in Some Amorphous Materials for Supercapacitors

Zheng

et al. 2018

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A breakthrough in technologies having "green" and sustainable energy storage conversion is urgent, and supercapacitors play a crucial role in this area of research. Owing to their unique porous structure, amorphous materials are considered one of the best active materials for high-performance supercapacitors due to their high specific capacity, excellent cycling stability, and fast charging rate. This Review summarizes the synthesis of amorphous materials (transition metal oxides, carbon-based materials, transition metal sulfides, phosphates, hydroxides, and their complexes) to highlight their electrochemical performance in supercapacitors.

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Section: Amorphous Carbon‐based Materialsmentioning

confidence: 99%

Recent Progress in Some Amorphous Materials for Supercapacitors

Zheng

et al. 2018

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“…This indicates the positive influence of H 2 O molecules [32] and 2D layered morphology of bare samples in the electrochemical performance, since in bare samples, the 2D nanostructure and H 2 O spacer between the interplanar layers ( Figure 4j) can greatly induce the diffusion and migration path of Na + ions for more intercalation and de-intercalation reactions than that of 1D heat-treated samples. [63,64] Figure 6c and Figure S7c (Supporting Information) shows the comparative GCD curves of AVO, KVO, and NVO and HAVO, HKVO, and HNVO samples at a constant current density of 0.5A g −1 . Figure S8a,b (Supporting Information) shows that as the scan rate increases the specific capacitance values exhibit a decreasing trend, since at low scan rate, the electrolytic ions take sufficient time to interact with the bulk of the active material and show a higher specific capacitance value.…”

Section: Wwwadvmatinterfacesdementioning

confidence: 99%

Vanadium Pentoxide with H₂O, K⁺, and Na⁺ Spacer between Layered Nanostructures for High‐Performance Symmetric Electrochemical Capacitors

Manikandan

Raj

Rajesh

et al. 2018

Adv Materials Inter

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batteries and the power density similar to the electric double-layer capacitors. [1][2][3][4] Generally, the transition metal oxides and conducting polymers are used as the pseudocapacitor electrode materials, [3] since it stores electric charges based on the Faradaic and non-Faradaic reactions arising at the interface of electrode/electrolyte. [5] Several transition metal oxides, metal sulfides, and metal hydroxides have been displayed to be appropriate for the electrodes of supercapacitors. [6] Mostly, transition metal oxides (e.g., RuO 2 , MnO 2 , NiO, and V 2 O 5 ) are widely utilized as the electrode material to attain pseudocapacitive energy storage property due to their multivalence oxidation states. [7] Among the various metal oxides, vanadium pentoxide (V 2 O 5 ) is reflected to be the most capable candidate for pseudocapacitor owing to its natural abundance and existence of variable oxidation states from +2 to +5 (VO, V 2 O 3 , VO 2 , and V 2 O 5 ). [8] In addition, V 2 O 5 possess a higher theoretical capacitance value of ≈2120 F g −1 under a considerable potential window of 1 V, and this is recognized to the higher oxidation state of vanadium to transfer more than one electron instantly. [9,10] So, vanadium pentoxide nanostructures have been the most regarded materials in various applications, [11] such as batteries, [12][13][14] supercapacitors, [15,16] catalyst, [17] optical switching, [18] and energy-saving devices. [19] In supercapacitors, apart from the electrical/electrochemical properties, the specific capacitance of vanadium oxide also depends upon the morphology and synthesis techniques. [20] Recently, different types of nanostructured V 2 O 5 such as nanowires, [21] nanoribbons, [22] nanorods, [23] nanoplatelets, [24] and nanobelts [25] have been applied for supercapacitor electrodes. [26] Moreover, various synthetic methods such as hydrothermal/solvothermal, thermal decomposition, chemical vapor deposition, microwave-assisted synthesis, and sol-gel [27,28] methods have been adopted for the fabrication of different forms of vanadium oxide nanostructures. Among various synthesis techniques, the hydrothermal method is a low-cost, environmentally friendly, and widely used technique for the development of inorganic nanostructures. The hydrothermal method is a scalable and simple method, retaining autoclaves at lower operational temperatures with Vanadium oxide 2D layered nanostructures with the hydrous form of potassium (K + ) and sodium (Na + ) are synthesized via hydrothermal reaction between VOSO 4 · xH 2 O and different persulfate oxidants ((NH 4 ) 2 S 2 O 8 , K 2 S 2 O 8 , and Na 2 S 2 O 8 ). The physicochemical characterization suggests that the synthesized V 2 O 5 · 3H 2 O nanostructures possess layered morphology with considerable amount of water molecules accommodated between the interlayer spacing of nanostructures. Moreover, samples obtained using K 2 S 2 O 8 and Na 2 S 2 O 8 oxidants have K + (6.41%) and Na + (0.38%) ions intercalated on the 2D nanostructure along with the water mole...

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“…Based on the above discussion, in this study, we demonstrate a composite electrode comprising MnO 2 nanoparticles loaded on a porous ZnCo 2 O 4 nanosheet material supported on graphene coated on a Ni foam substrate, which is shown in Fig. 1 2 ), sodium sulphate (Na 2 SO 4 ) and hydrochloric acid (HCl) were commercially available from Aladdin Chemical Co. All materials were analytical grade reagents, commercially available and used without any purication. Ni foam (thickness: 1.5 mm, pore density: 100 PPI, areal density: 380 g m À2 ) was obtained from Changsha Lyrun New Materials Corporation.…”

Section: Introductionmentioning

confidence: 99%

“…1 For utilizing renewable sources, supercapacitors are one of the most promising candidates on account of their fast charging capabilities, high power densities and good cycling performances. 2 Although they have these excellent features, the relatively low energy densities of supercapacitors seriously limit their large-scale practical application. 3 Thus, it is necessary to improve the energy densities of supercapacitors to meet future energy demand.…”

Section: Introductionmentioning

confidence: 99%

MnO₂/ZnCo₂O₄ with binder-free arrays on nickel foam loaded with graphene as a high performance electrode for advanced asymmetric supercapacitors

et al. 2019

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ZnCo 2 O 4 nanosheets were successfully arrayed on a Ni foam surface with graphene using a hydrothermal method followed by annealing treatment; then MnO 2 nanoparticles were electrodeposited on the ZnCo 2 O 4 nanosheets to obtain a synthesized composite binder-free electrode named MnO 2 /ZnCo 2 O 4 /graphene/Ni foam (denoted as MnO 2 /ZnCo 2 O 4 /G/NF). After testing the binder-free composite electrode of MnO 2 / ZnCo 2 O 4 /G/NF via cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy testing, we found that it exhibited ultrahigh electrochemical properties, with a high specific areal capacitance of 3405.21 F g À1 under a current density of 2 A g À1 , and wonderful cycling stability, with 91.2% retention after 5000 cycles. Moreover, an asymmetric supercapacitor (ASC) based on MnO 2 / ZnCo 2 O 4 /G/NF//G/NF was successfully designed. When tested, the as-designed ASC can achieve a maximum energy density of 46.85 W h kg À1 at a power density of 166.67 W kg À1 . Finally, the ASC we assembled can power a commercial red LED lamp successfully for more than 5 min, which proves its practicability. All these impressive performances indicate that the MnO 2 /ZnCo 2 O 4 /graphene composite material is an outstanding electrode material for electrochemical capacitors.

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Pt-nanoparticle functionalized carbon nano-onions for ultra-high energy supercapacitors and enhanced field emission behaviour

Abstract: In the present work, we have investigated the charge storage capacitive response and field emission behaviour of platinum (Pt) nanoparticles decorated on carbon nano onions (CNOs) and compared them with those of pristine carbon nano onions.

Cited by 52 publications

References 65 publications

Recent Progress in Some Amorphous Materials for Supercapacitors

Recent Progress in Some Amorphous Materials for Supercapacitors

Vanadium Pentoxide with H₂O, K⁺, and Na⁺ Spacer between Layered Nanostructures for High‐Performance Symmetric Electrochemical Capacitors

MnO₂/ZnCo₂O₄ with binder-free arrays on nickel foam loaded with graphene as a high performance electrode for advanced asymmetric supercapacitors

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Pt-nanoparticle functionalized carbon nano-onions for ultra-high energy supercapacitors and enhanced field emission behaviour

Abstract: In the present work, we have investigated the charge storage capacitive response and field emission behaviour of platinum (Pt) nanoparticles decorated on carbon nano onions (CNOs) and compared them with those of pristine carbon nano onions.

Cited by 52 publications

References 65 publications

Recent Progress in Some Amorphous Materials for Supercapacitors

Recent Progress in Some Amorphous Materials for Supercapacitors

Vanadium Pentoxide with H2O, K+, and Na+ Spacer between Layered Nanostructures for High‐Performance Symmetric Electrochemical Capacitors

MnO2/ZnCo2O4 with binder-free arrays on nickel foam loaded with graphene as a high performance electrode for advanced asymmetric supercapacitors

Contact Info

Product

Resources

About

Vanadium Pentoxide with H₂O, K⁺, and Na⁺ Spacer between Layered Nanostructures for High‐Performance Symmetric Electrochemical Capacitors

MnO₂/ZnCo₂O₄ with binder-free arrays on nickel foam loaded with graphene as a high performance electrode for advanced asymmetric supercapacitors