Investigation on mesoporous bimetallic tungstate nanostructure for high-performance solid- state supercapattery

Prabhu, Shivananda; Balaji, C.; Navaneethan, M.; Selvaraj, Manickam; Anandhan, N.; Sivaganesh, D.; Saravanakumar, S.; Sivakumar, Periyasamy; Ramesh, R.

doi:10.1016/j.jallcom.2021.160066

Cited by 41 publications

(11 citation statements)

References 83 publications

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“…Figure d displays the GCD curves of the Ni 0.5 Co 0.5 MoO 4 /AC device, which was delivered at a cell potential of 0.0 to 1.45 V . Electrochemical performance for the hybrid supercapacitor device was estimated by using GCD curves as follows: Q cell = 2 I true∫ V normald t M V E = 2 I true∫ V normald t 3.6 M P = E × 3600 t where Q cell is the cell specific capacity (C g –1 ), M is the total mass (mg) of active materials, t is the discharge time (s), and V is the potential of the assembled device …”

Section: Results and Discussionmentioning

confidence: 99%

Performances of Co²⁺-Substituted NiMoO₄ Nanorods in a Solid-State Hybrid Supercapacitor

Prabhu

Maruthapandi

Durairaj

et al. 2023

ACS Appl. Energy Mater.

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A hydrothermal method was conducted to synthesize Ni (1−α) Co (α) MoO 4 (α = 0, 0.1, 0.3, and 0.5 M) nanorods, which were proven as excellent electrode materials in a hybrid supercapacitor. Their electrochemical properties were also dependent on the Ni/Co ratio as demonstrated by different electrochemical techniques. Ni 0.5 Co 0.5 MoO 4 (α = 0.5 M) offered specific capacity (Q g ) = 354 Cg −1 @1 Ag −1 , a remarkable specific capacity with a notable retention capacity of 92% after 8000 repeated cycles at 10 Ag −1 . Ni 0.5 Co 0.5 MoO 4 with a high surface area outperformed the mono-metallic (NiMoO 4 ) and bimetallic (Ni 0.9 Co 0.1 MoO 4 and Ni 0.7 Co 0.3 MoO 4 ) nanostructures. The hybrid supercapacitor (Ni 0.5 Co 0.5 MoO 4 //activated carbon) delivered a maximum Q cell of 53 Cg −1 at 1 Ag −1 with an energy density of 16.2 Wh kg −1 and power density of 725 W kg −1 .

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Section: Results and Discussionmentioning

confidence: 99%

Performances of Co²⁺-Substituted NiMoO₄ Nanorods in a Solid-State Hybrid Supercapacitor

Prabhu

Maruthapandi

Durairaj

et al. 2023

ACS Appl. Energy Mater.

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“…The GCD curves of PPy and PPy/CQDs composite electrodes are illustrated in Figure 5B. The specific capacity ( Q g ) of PPy and PPy/CQDs electrode is calculated from the GCD plot using the following equation 59‐61 :

Q_{g} goodbreak= \frac{2 \times I \times \int italicVdt}{m \times V} C / g

where Q g — specific capacity, I —discharging current ( A ), m —active material mass ( g ), V —potential window, and ∫Vdt —discharge curve area. The Q g decreased with an increasing the current density.…”

Section: Resultsmentioning

confidence: 99%

“…The GCD curves of PPy and PPy/CQDs composite electrodes are illustrated in Figure 5B. The specific capacity (Q g ) of PPy and PPy/CQDs electrode is calculated from the GCD plot using the following equation [59][60][61] :…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

Fabrication of semi‐flexible carbon quantum dots‐reinforced polypyrrole ( PPy / CQDs ) composite electrodes by hybrid electrospray deposition for high‐performance energy storage device

Dhandapani¹,

Prabhu

Duraisamy³

et al. 2022

Intl J of Energy Research

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Summary A carbon quantum dots‐reinforced polypyrrole (PPy/CQDs) composite electrodes were prepared via the hybrid electrospray method. PPy/CQDs composite shows superior electrochemical performance with a specific capacity (Qg) of 174.21 C g−1 at 1 A g−1 in 3 M KOH aqueous electrolyte. An all‐solid‐state asymmetric supercapacitor (ASC) is composed of PPy/CQDs as a positive electrode and rGO as a negative electrode with PVA/KOH gel electrolyte, which exhibited the specific capacity (Qg) of 79.25 C g−1 at the current density of 1.5 A g−1 with an energy and power density of 26.44 Wh kg−1 and 18 090.82 W kg−1, respectively. An assembled PPy/CQDs//rGO device offers cyclic retention of about 76.8% at 15 A g−1 after 10 000 cycles. The above results confirmed that the as‐prepared PPy/CQDs composite electrode is more suitable for high‐performance‐based semi‐flexible supercapacitor application.

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“…On the other hand, compiling these single metal oxides into a bimetallic oxide or multimetallic oxide system can significantly improve its overall electrochemical properties due to the synergistic effect rendered by the individual metal ions present in the mixed metallic oxide system. [22][23][24] Particularly, the mixed multimetallic TMOs are featured with more abundant storing sites than their single counterparts. 22,25,26 More importantly, ternary TMOs with three different metal cations are attractive owing to the multiple valance states, the synergistic effect of multimetal cations, and high electronic conductivity.…”

Section: Introductionmentioning

confidence: 99%

“…However, the practical applications of these mono‐metal oxides are limited by their low electrical conductivity, limited electroactive sites, and poor cyclic stability. On the other hand, compiling these single metal oxides into a bimetallic oxide or multimetallic oxide system can significantly improve its overall electrochemical properties due to the synergistic effect rendered by the individual metal ions present in the mixed metallic oxide system 22‐24 . Particularly, the mixed multimetallic TMOs are featured with more abundant storing sites than their single counterparts 22,25,26 .…”

Section: Introductionmentioning

confidence: 99%

Synergistic integration of three‐dimensional architecture composed of two‐dimensional nanostructure ternary metal oxide for high‐performance hybrid supercapacitors

Sivakumar

Jung

Raj

et al. 2021

Intl J of Energy Research

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Summary Constructing electroactive materials with hierarchically structured porous architecture is promising for developing various energy storage electrodes. In particular, the transition metal complexes with this archistructure are potential toward the fabrication of high‐performance hybrid supercapacitors (HSCs) due to the rational design and its peculiar Faradic battery‐type charge storage behavior. Herein, we report the hierarchically structured microflowers of ternary nickel cobalt molybdenum oxide (NCMO) assembled by ultrathin nanosheets via a hydrothermal process and the subsequent calcination. The interconnected open network and abundant void space of hierarchically structured flower‐like NCMO are associated with improved electrochemical performance. Consequently, the obtained NCMO electrode achieves the larger specific capacitance (Cs) of 1696 F g−1 at 1 A g−1 than the nickel molybdenum oxide (NMO; 878 F g−1), cobalt molybdenum oxide (CMO; 690 F g−1), NiO (350 F g−1), and Co3O4 (259 F g−1) electrodes, respectively. The electrochemical performances of HSCs, configured using the hierarchically structured ternary NCMO microflower and activated carbon (AC), respectively, are optimized by varying mass ratios of two electrodes. In particular, the NCMO//AC HSCs with 1:3 (D13) mass ratio exhibit the maximum energy and power densities of 51.22 W h kg−1 and 41.67 kW kg−1 with the high‐capacitance retention of 89.29% over 20 000 cycles.

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Investigation on mesoporous bimetallic tungstate nanostructure for high-performance solid- state supercapattery

Cited by 41 publications

References 83 publications

Performances of Co²⁺-Substituted NiMoO₄ Nanorods in a Solid-State Hybrid Supercapacitor

Performances of Co²⁺-Substituted NiMoO₄ Nanorods in a Solid-State Hybrid Supercapacitor

Fabrication of semi‐flexible carbon quantum dots‐reinforced polypyrrole ( PPy / CQDs ) composite electrodes by hybrid electrospray deposition for high‐performance energy storage device

Synergistic integration of three‐dimensional architecture composed of two‐dimensional nanostructure ternary metal oxide for high‐performance hybrid supercapacitors

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Investigation on mesoporous bimetallic tungstate nanostructure for high-performance solid- state supercapattery

Cited by 41 publications

References 83 publications

Performances of Co2+-Substituted NiMoO4 Nanorods in a Solid-State Hybrid Supercapacitor

Performances of Co2+-Substituted NiMoO4 Nanorods in a Solid-State Hybrid Supercapacitor

Fabrication of semi‐flexible carbon quantum dots‐reinforced polypyrrole ( PPy / CQDs ) composite electrodes by hybrid electrospray deposition for high‐performance energy storage device

Synergistic integration of three‐dimensional architecture composed of two‐dimensional nanostructure ternary metal oxide for high‐performance hybrid supercapacitors

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Performances of Co²⁺-Substituted NiMoO₄ Nanorods in a Solid-State Hybrid Supercapacitor

Performances of Co²⁺-Substituted NiMoO₄ Nanorods in a Solid-State Hybrid Supercapacitor