Synthesis of cobalt phosphate-graphene foam material via co-precipitation approach for a positive electrode of an asymmetric supercapacitors device

Mahmoud, Badr Ahmed; Mirghni, Abdulmajid Abdallah; Oyedotun, Kabir O.; Momodu, Damilola Y.; Fasakin, Oladepo; Manyala, Ncholu I.

doi:10.1016/j.jallcom.2019.153332

Cited by 52 publications

(26 citation statements)

References 41 publications

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“…α-MnO 2 is excellent for supercapacitor electrodes based on its economic, natural abundance and environmentally friendly nature and outstanding capacitive properties. Similarly, pure Cu and Zn-doped CdO nanoparticles [170], cobalt phosphate Co 3 (PO 4 ) 2 and cobalt phosphate/graphene foam composites Co 3 (PO 4 ) 2 /GF [171], CeMoO 4 nanostructure [172], (Mn 2 O 3 -Mn 3 O 4 ) nanoparticles [173], PEG-MnMoO 4 [174] were also prepared by means of the co-precipitation method for supercapacitor applications.…”

Section: Co-precipitation Processmentioning

confidence: 99%

A Review of Supercapacitors: Materials Design, Modification, and Applications

et al. 2021

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Supercapacitors (SCs) have received much interest due to their enhanced electrochemical performance, superior cycling life, excellent specific power, and fast charging–discharging rate. The energy density of SCs is comparable to batteries; however, their power density and cyclability are higher by several orders of magnitude relative to batteries, making them a flexible and compromising energy storage alternative, provided a proper design and efficient materials are used. This review emphasizes various types of SCs, such as electrochemical double-layer capacitors, hybrid supercapacitors, and pseudo-supercapacitors. Furthermore, various synthesis strategies, including sol-gel, electro-polymerization, hydrothermal, co-precipitation, chemical vapor deposition, direct coating, vacuum filtration, de-alloying, microwave auxiliary, in situ polymerization, electro-spinning, silar, carbonization, dipping, and drying methods, are discussed. Furthermore, various functionalizations of SC electrode materials are summarized. In addition to their potential applications, brief insights into the recent advances and associated problems are provided, along with conclusions. This review is a noteworthy addition because of its simplicity and conciseness with regard to SCs, which can be helpful for researchers who are not directly involved in electrochemical energy storage.

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Section: Co-precipitation Processmentioning

confidence: 99%

A Review of Supercapacitors: Materials Design, Modification, and Applications

et al. 2021

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“…Different approaches have been adopted to address these obstacles. Mahmoud et al use a co‐precipitation approach to synthesize cobalt phosphate‐graphene foam and achieved specific energy of 52 Wh/kg 34 . Pandit et al achieve electroless‐deposited Ag nanoparticles and use them for electrochemical SC and specific energy of 27.8 Wh/kg was obtained 35 .…”

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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“…For S1, S2, and S3, there was a nanoflower-like morphology due to the high concentration of copper, which facilitates the high ionic conduction, 38 whereas for S5, the particles are agglomerated, which reveals low conductivity. 43 …”

Section: Resultsmentioning

confidence: 99%