Optimizing electrochemical performance of sonochemically and hydrothermally synthesized cobalt phosphate for supercapattery devices

Iqbal, Muhammad Zahir; Khan, Junaid; Siddique, Salma; Afzal, Amir Muhammad; Aftab, Sikandar

doi:10.1016/j.ijhydene.2021.02.077

Cited by 45 publications

(14 citation statements)

References 53 publications

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“…The choice of positive electrode material highly influences supercapattery performance 17 . The enriched electrochemical active sites, conductive nature, and high porosity are the properties that enhanced the charge storage capability of material 18‐20 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced electrochemical performance of battery‐grade cobalt phosphate via magnetron sputtered copper interfacial layer for potential supercapattery applications

et al. 2021

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Summary The supercapattery has achieved significant prominence for its high specific energy and power: however, still craved for electrodes with high ionic conduction and superior electrochemical performance. The study demonstrates the tuned electrochemical performance of cobalt phosphate via introducing a magnetron sputtered copper interfacial layer. Cobalt phosphate nanomaterials synthesized via the sonochemical approach was utilized as active electrode material. The magnetron sputter technique was employed to deposit copper on current collector (nickel foam). The structural studies and morphological aspects and elemental analysis were analyzed via X‐ray diffraction, scanning electron microscopy (SEM), and energy‐dispersive X‐ray spectroscopy. Atomic force microscopy (AFM) was performed to scrutinize the surface morphology of magnetron sputtered copper. The cobalt phosphate deposited on copper sputtered nickel foam profits a specific capacity (Qs) of 403.1 C/g (120.9% as compared to bare nickel foam) at 3 mV/s and 348.4 C/g (135.7% as compared with bare nickel foam) at 0.6 A/g in three electrode assembly. This electrode was further utilized in an asymmetric architecture (supercapattery device) that delivers outstanding Qs of 265.2 C/g with excellent Es of 62.6 Wh/kg and Ps of 425 W/kh at 0.5 A/g. The device also delivers an excellent Ps of 7924 W/kg while retaining Es of 11.8 Wh/kg at 7 A/g. Moreover, outstanding capacitive retention of 92.9% was observed after 5000 consecutive charge discharge cycles. In addition, the hybrid performance of the designed supercapattery was also explored via a theoretical methodology. The maximum diffusive and capacitive contribution of 88.81% (at 3 mV/s) and 55.11% (at 100 mV/s) was grasped by the device. To the best of our knowledge, this is the first approach toward the utilization of magnetron sputtered interfacial nanograins layer to tune the electrochemical performance of electrode material for potential supercapattery devices.

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Section: Introductionmentioning

confidence: 99%

Enhanced electrochemical performance of battery‐grade cobalt phosphate via magnetron sputtered copper interfacial layer for potential supercapattery applications

et al. 2021

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“…Its specific capacity was 221.4 F g −1 , power density was 6800 Wh kg −1 , energy density was 34.75 Wh kg −1 , and retention was 87.2 % after 10,000 cycles. They concluded that the sonochemical approach, though novel, proved beneficial in controlling structural properties [94] . Bimetallic hollow phosphate was synthesized and used for high supercapacitor performance.…”

Section: Applications Of Hollow Metal Phosphatesmentioning

confidence: 99%

Hollow Structured Transition Metal Phosphates and Their Applications

Munkaila

Dahal

Kokayi

et al. 2022

The Chemical Record

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Hollow nanostructures of transition metal phosphate are of immense interest in the existing and evolving areas of technology, due to their high surface area, presence of hollow void, and easy tuning of compositions and dimensions. Emerging synthesis methods such as templatefree methods, hard-templating, and soft-templating are discussed in this review. Applications of these hollow metal phosphates dominate in energy storage and conversions, with specific advantages as supercapacitor materials. Other applications, including drug delivery, water splitting, catalysis, and adsorption, are reviewed. Finally, additional perspectives on the progress of these nanostructures, and their existing challenges related to the current synthesis routes are covered. Therefore, with the strategic modifications of the unique properties of these hollow metal phosphates, broader application requirements are fulfilled.

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“…The most commonly used positive electrode materials are transition metal oxides, [13][14][15][16] metal hydroxides, 17,18 mixed metal suldes, [19][20][21][22] and phosphates. [23][24][25][26][27][28] Among these materials, metal phosphates and phosphides have been explored as suitable candidates. 29 Their low cost, chemical stability, redox-active nature, and excellent electrochemical properties make them more feasible for efficient SC devices.…”

Section: Introductionmentioning

confidence: 99%

“…30 Among various phosphates and phosphides, manganese and cobalt phosphates are intensively studied for SC applications due to high capacitance, thermal and electrochemical stability, and excellent electrochemical activities. 28,[31][32][33][34] For example, Mirghni et al synthesized MnPO 4 nanorods via utilizing the hydrothermal process and investigated the behavior of MnPO 4 by different mass loadings on graphene foam. 31 The highest capacitance was found to be 270 F g À1 at 0.5 A g À1 using an operating voltage window of 1.4 V in 6 M KOH electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Exploring the electrochemical performance of copper-doped cobalt–manganese phosphates for potential supercapattery applications

et al. 2021

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Optimizing electrochemical performance of sonochemically and hydrothermally synthesized cobalt phosphate for supercapattery devices

Cited by 45 publications

References 53 publications

Enhanced electrochemical performance of battery‐grade cobalt phosphate via magnetron sputtered copper interfacial layer for potential supercapattery applications

Enhanced electrochemical performance of battery‐grade cobalt phosphate via magnetron sputtered copper interfacial layer for potential supercapattery applications

Hollow Structured Transition Metal Phosphates and Their Applications

Exploring the electrochemical performance of copper-doped cobalt–manganese phosphates for potential supercapattery applications

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