Ag<sub>3</sub>O<sub>4</sub>grafted NiO nanosheets for high performance supercapacitors

Babu, I. Manohara; Purushothaman, K. K.; Muralidharan, G.

doi:10.1039/c4ta04586f

Cited by 37 publications

(10 citation statements)

References 51 publications

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“…Most importantly, grafting of CMC over Co 3 O 4 has been evidenced by HRTEM images. Grafting of CMC over parent nuclei exchanges their mutual energy and gets a synergetic effect that leads to excellent electrochemical phenomenon [39] . Further the inter‐planner distance between successive planes in cobalt material is provided in Figure 4e which also supports the XRD studies.…”

Section: Resultssupporting

confidence: 72%

Carboxymethyl Cellulose Grafted on Mesoporous Cobalt Oxide Milieu: Synthesis, Formation Mechanism and Electrochemical Features

Babu

Dass²,

Inbamani³

2022

ChemistrySelect

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In the present study, mesoporous Co x O y /C nanoflakes were fabricated using facile one-pot short span hydrothermal approach to explore its potential in energy storage devices. The fabricated composite electrode delivers maximum specific capacity of 372 C g À 1 at a current density of 1 A g À 1 with a meager charge transfer resistance (1.5 Ω). The excellent energy storage property is attributed to the presence of hierarchical arrangement of inter connected flaky structure that provides a fresh lanes for the mobilization of electrolyte ions. Moreover, an asymmetric supercapacitor (ASC) was assembled by sandwiching battery-type Faradic electrode and carbonaceous electrode. The device shows excellent electrochemical capability and noble cycling stability (90.9 % capacitance retention) after 10000 cycles of charge/discharge. Such enduring prominent properties of the fabricated device will make a benchmark in real time applications.

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Section: Resultssupporting

confidence: 72%

Carboxymethyl Cellulose Grafted on Mesoporous Cobalt Oxide Milieu: Synthesis, Formation Mechanism and Electrochemical Features

Babu

Dass²,

Inbamani³

2022

ChemistrySelect

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“…Impressively, such excellent aspects in AgCoO 2 −Co 3 O 4 /C architectures will help in practical applications. A reciprocal relation has been monitored (Figure S7) from the plot of specific capacitance against scan rate and the fact was already evidenced by many researchers …”

Section: Resultsmentioning

confidence: 72%

“…A reciprocal relation has been monitored ( Figure S7) from the plot of specific capacitance against scan rate and the fact was already evidenced by many researchers. [39] Rate performance of the prepared electrodes was studied using galvanostatic charge/discharge experiments. Figure 7 (ac) represents the GCD traces of silver cobalt oxide/carbon nanocomposite electrodes at various current densities (vs Ag/ AgCl) between the potential range À 0.15 V to 0.45 V. Nonlinearity in GCD profile reveals the capacitance of the electrodes has been derived from the integral action of pseudocapacitance and double layer capacitance.…”

Section: Electrochemical Analysis On Agcoo 2 à Co 3 O 4 /C Architectumentioning

confidence: 99%

AgCoO₂−Co₃O₄/CMC Cloudy Architecture as High Performance Electrodes for Asymmetric Supercapacitors

2020

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This work represents the design of superior supercapacitor electrode that comprised of 3D cloud like silver cobalt oxide/ cobalt oxide (AgCoO 2 À Co 3 O 4 ) and carbon architecture. AgCoO 2 À Co 3 O 4 /C architecture can be fabricated from CoÀ Ag nitrate precursors with the addition of carboxymethyl cellulose followed by annealing. Mesoporous 3D cloudy architecture provides higher specific capacitance (575 F g À 1 at a scan rate of 2 mV s À 1 ) and rate performance (666 F g À 1 at a current density of 1 A g À 1 ). The combined effect of AgCoO 2 embedded Co 3 O 4 and carboxymethyl cellulose (carbon) highly favors for outstanding cycle life (around 1 % capacitance degradation even after 5000 cycles). Presence of such porous 3D architecture with carbon backbone delivers admirable energy/power density. Also, an advanced asymmetric supercapacitor with an operating range of 1.2 V is designed by utilizing this porous 3D cloudy architecture as positive electrode and activated carbon as negative electrode. The fabricated design shows a robust energy density of 17 W h kg À 1 with a high power density of 166 W kg À 1 at a current density of 1 A g À 1 . The findings of the current study underline the potential of AgCoO 2 À Co 3 O 4 /C electrodes for supercapacitor applications.[a] I.

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“…4 a . The CV curves of three samples at a scan rate of 5 mV/s in a potential range between 0 and 0.6 V. Obviously, two redox peaks are observed in the curves, implying the typical pseudo‐capacitance characteristic of the active material [16]. In addition, the area enclosed by a CV curve indicates the specific capacitance of the active material to some extent.…”

Section: Resultsmentioning

confidence: 99%

One‐step combustion synthesis porous amorphous NiO/C/CNTs composite for high‐performance supercapacitors

Xuan

Zhang

et al. 2018

Micro & Nano Letters

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High-quality amorphous NiO/C/carbon nanotubes (CNTs) composite with an irregular porous structure have been successfully synthesised by a one-step combustion process at 350°C for 2 h with a heating rate of 3°C/min in air. To fully understand the potential of NiO/C/CNTs, the phase composition, morphology and electrochemical properties of materials were investigated. Benefiting from the in situ formed carbon, the addition of the CNTs and the advantages of the porous structure, the materials have shown superior electrochemical properties for supercapacitors. The specific capacitance of the composite reaches up to 1618 F/g at a current density of 1 A/g. Furthermore, the NiO/C/CNTs||activate carbon asymmetric supercapacitor device demonstrates both a high energy density (25.9 Wh kg −1) and power density (5570 W kg −1), and delivers a better cycling stability (about 94%) after 7000 cycles, which is a potential material for further development of fabricating a supercapacitor electrode.

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Ag₃O₄grafted NiO nanosheets for high performance supercapacitors

Cited by 37 publications

References 51 publications

Carboxymethyl Cellulose Grafted on Mesoporous Cobalt Oxide Milieu: Synthesis, Formation Mechanism and Electrochemical Features

Carboxymethyl Cellulose Grafted on Mesoporous Cobalt Oxide Milieu: Synthesis, Formation Mechanism and Electrochemical Features

AgCoO₂−Co₃O₄/CMC Cloudy Architecture as High Performance Electrodes for Asymmetric Supercapacitors

One‐step combustion synthesis porous amorphous NiO/C/CNTs composite for high‐performance supercapacitors

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Ag3O4grafted NiO nanosheets for high performance supercapacitors

Cited by 37 publications

References 51 publications

Carboxymethyl Cellulose Grafted on Mesoporous Cobalt Oxide Milieu: Synthesis, Formation Mechanism and Electrochemical Features

Carboxymethyl Cellulose Grafted on Mesoporous Cobalt Oxide Milieu: Synthesis, Formation Mechanism and Electrochemical Features

AgCoO2−Co3O4/CMC Cloudy Architecture as High Performance Electrodes for Asymmetric Supercapacitors

One‐step combustion synthesis porous amorphous NiO/C/CNTs composite for high‐performance supercapacitors

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Ag₃O₄grafted NiO nanosheets for high performance supercapacitors

AgCoO₂−Co₃O₄/CMC Cloudy Architecture as High Performance Electrodes for Asymmetric Supercapacitors