3D Assembly of CoAl<sub>2</sub>O<sub>4</sub> Spinel Nanosheets for Energy Storage

Panda, Prajnashree; Mishra, Ranjit; Panigrahy, Sonali; Barman, Sudip

doi:10.1021/acsanm.2c00219

Cited by 13 publications

(23 citation statements)

References 70 publications

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“…Specific capacitance (C s ) can be obtained from the CV curve by using the Equation () 31

{normalC}_{normals} = \frac{\int I dV}{2 mΔVν}

…”

Section: Resultsmentioning

confidence: 99%

“…The full cell is represented as a‐MoS 2 /C‐dots//AC. The weight ratio of a‐MoS 2 /C‐dots and AC was calculated so as to balance the charge storage by using Equation () 31

\frac{m^{-}}{m^{+}} = \frac{{normalC}^{+} ∆ {normalV}^{+}}{{normalC}^{-} ∆ {normalV}^{-}}

…”

Section: Resultsmentioning

confidence: 99%

“…Here, m + was the mass of positive electrode (mg), C + and C − were the specific capacitance of a‐MoS 2 /C‐dots and AC, respectively,

∆ V

+ and

∆ V

− were the potential range of positive (a‐MoS 2 /C‐dots) and negative (AC) electrode, respectively, and m − was the weight of anode 31

ED = \frac{{normalC}_{normals} {((), ΔV)}^{2}}{7.2}

PD = \frac{normalE}{∆ t} \times 3600

…”

Section: Resultsmentioning

confidence: 99%

“…Capacitive contribution demonstrates non‐insertion capacity, related to both EDLC contribution and fast faradaic pseudocapacity (surface ion desorption/adsorption process) and varies linearly with sweep rate (v), and diffusion contribution is due to the diffusion‐controlled intercalation process, which varies linearly with v 1/2 . In order to quantify the capacitive and diffusion contributions, the following equation is used at a certain scan rate which is presented below in Equation () 31

i (normalV) = {normalk}_{1} v + {normalk}_{2} {normalv}^{1 / 2},

where k 1 and k 2 are constant, and v represents the sweep rate.…”

Section: Resultsmentioning

confidence: 99%

“…In order to quantify the capacitive and diffusion contributions, the following equation is used at a certain scan rate which is presented below in Equation ( 6). 31 i…”

Section: Edmentioning

confidence: 99%

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In‐situ nano‐engineering of amorphous MoS ₂ nanosheets with carbon dots for enhanced supercapacitor performances

Panda

Mishra

Barman

2022

Intl J of Energy Research

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Amorphous materials have snatched special attention for electrochemical energy storage applications owing to the presence of plenty of activate sites for energy storage. Herein, we report the microwave-assisted-hydrothermal synthesis of amorphous MoS 2 with some 1T phase and in-situ-nano-engineering with C-dots for energy storage application. The specific capacitance (C s ) of a-MoS 2 /C-dots was found to be 1368 F g À1 (at 1 A g À1 ), which is $ 2.9 and 1.65 times higher than a-MoS 2 (without C-dots) and crystalline c-MoS 2 /C-dots. Capacitance is also strongly dependent on synthesis methods: C s of a-MoS 2 /Cdots is 2.15 times higher than h-MoS 2 /C-dots produced by the normalhydrothermal method. The asymmetric supercapacitor was designed using a-MoS 2 /C-dots as cathode and activated-carbon as anode showing C s 180.82 F g À1 at a maximum potential of 1.5 V. Energy density (ED) of 56.5 W h kg À1 at a power density (PD) of 750 W kg À1 with excellent capacitance retention was observed. The high C s of a-MoS 2 /C-dots can be attributed to amorphous MoS 2 , formation of metallic 1T phase, good charge transport, and strong catalyst support interaction. This synthesis and in-situ nano engineering method of MoS 2 may provide a promising technique for developing a high-performance supercapacitor for energy storage applications. K E Y W O R D S alkaline medium, amorphous MoS 2 , carbon dot, energy storage applications, MoS 2 , supercapacitor

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“…Specific capacitance (C s ) can be obtained from the CV curve by using the Equation () 31

{normalC}_{normals} = \frac{\int I dV}{2 mΔVν}

…”

Section: Resultsmentioning

confidence: 99%

“…The full cell is represented as a‐MoS 2 /C‐dots//AC. The weight ratio of a‐MoS 2 /C‐dots and AC was calculated so as to balance the charge storage by using Equation () 31

\frac{m^{-}}{m^{+}} = \frac{{normalC}^{+} ∆ {normalV}^{+}}{{normalC}^{-} ∆ {normalV}^{-}}

…”

Section: Resultsmentioning

confidence: 99%

“…Here, m + was the mass of positive electrode (mg), C + and C − were the specific capacitance of a‐MoS 2 /C‐dots and AC, respectively,

∆ V

+ and

∆ V

− were the potential range of positive (a‐MoS 2 /C‐dots) and negative (AC) electrode, respectively, and m − was the weight of anode 31

ED = \frac{{normalC}_{normals} {((), ΔV)}^{2}}{7.2}

PD = \frac{normalE}{∆ t} \times 3600

…”

Section: Resultsmentioning

confidence: 99%

i (normalV) = {normalk}_{1} v + {normalk}_{2} {normalv}^{1 / 2},

where k 1 and k 2 are constant, and v represents the sweep rate.…”

Section: Resultsmentioning

confidence: 99%

“…In order to quantify the capacitive and diffusion contributions, the following equation is used at a certain scan rate which is presented below in Equation ( 6). 31 i…”

Section: Edmentioning

confidence: 99%

See 3 more Smart Citations

In‐situ nano‐engineering of amorphous MoS ₂ nanosheets with carbon dots for enhanced supercapacitor performances

Panda

Mishra

Barman

2022

Intl J of Energy Research

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Ni‐Co‐based bimetal organic framework as superior electrode material for hydrogen evolution reaction and supercapacitors

Bhardwaj,

Srivastava,

Mageto

et al. 2023

Energy Storage

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Metal‐organic frameworks (MOFs) possess several desirable properties, including a homogeneous crystal structure, variable porosity, high surface area, and a notable adsorption affinity, making them highly promising contenders for deployment as electrode materials in supercapacitors (SCs) and water electrolyzers, which are acknowledged for the ever‐increasing demand for instantaneous energy. Herein, we report the rationally assembled Ni‐Co‐based bimetallic MOF compounds using a glutaric acid as an organic ligand and low‐temperature hydrothermal treatment that surmounts the electrocatalytic and electrochemical charge storage activity in an alkaline medium. The NiCo‐MOF surpassed the hydrogen evolution reaction (HER) among other as‐synthesized materials, exhibiting the least overpotential of 182 mV at 10 mA/cm2 of current density, showed splendid kinetics with a turnover frequency of 2.86 s−1, and higher stability after 1000 HER cycles in 1 M KOH. Furthermore, NiCo‐MOF impetuses were employed for SC application and displayed the highest specific capacitance of 978 F/g than Ni‐MOF (706 F/g) and Co‐MOF (91 F/g) at 1 A/g of current density. Theoretical studies exhibited that the optimal electronic coupling and synergistic effect due to Ni‐Co sites enhances the overall electronic properties of NiCo‐MOF. Therefore, enhancing its electrochemical performance concerning water‐splitting and charge storage. This study showcases a novel approach for producing ultrathin and flexible bimetallic MOF‐based electrode material to enrich the performance in electrocatalytic HER and SCs.

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Electrochemical performance of FeNbO4/rGO as an electrode material for supercapacitor application

Khaliq,

Alotaibi,

Alrowaily

et al. 2024

Diamond and Related Materials

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3D Assembly of CoAl₂O₄ Spinel Nanosheets for Energy Storage

Cited by 13 publications

References 70 publications

In‐situ nano‐engineering of amorphous MoS ₂ nanosheets with carbon dots for enhanced supercapacitor performances

In‐situ nano‐engineering of amorphous MoS ₂ nanosheets with carbon dots for enhanced supercapacitor performances

Ni‐Co‐based bimetal organic framework as superior electrode material for hydrogen evolution reaction and supercapacitors

Electrochemical performance of FeNbO4/rGO as an electrode material for supercapacitor application

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3D Assembly of CoAl2O4 Spinel Nanosheets for Energy Storage

Cited by 13 publications

References 70 publications

In‐situ nano‐engineering of amorphous MoS 2 nanosheets with carbon dots for enhanced supercapacitor performances

In‐situ nano‐engineering of amorphous MoS 2 nanosheets with carbon dots for enhanced supercapacitor performances

Ni‐Co‐based bimetal organic framework as superior electrode material for hydrogen evolution reaction and supercapacitors

Electrochemical performance of FeNbO4/rGO as an electrode material for supercapacitor application

Contact Info

Product

Resources

About

3D Assembly of CoAl₂O₄ Spinel Nanosheets for Energy Storage

In‐situ nano‐engineering of amorphous MoS ₂ nanosheets with carbon dots for enhanced supercapacitor performances

In‐situ nano‐engineering of amorphous MoS ₂ nanosheets with carbon dots for enhanced supercapacitor performances