Solvothermal-derived nanoscale spinel bimetallic oxide particles rationally bridged with conductive vapor-grown carbon fibers for hybrid supercapacitors

Nagaraju, Manchi; Sekhar, S. Chandra; Arbaz, Shaik Junied; Yu, Jae Su

doi:10.1016/j.apsusc.2021.150223

Cited by 21 publications

(5 citation statements)

References 26 publications

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“…Some articles proscribe the cleaning of Ni foam by one or a combination of the following processes: degreasing in hot acetone under reflux, etching under the ultrasonic bath in 0.1, 1, 3, or 6 M HCl, ultrasonic treatment of Ni foam in ethanol and deionized water, and rinsing with deionized water [ 19 , 24 , 27 , 28 , 29 , 31 , 39 ] to dissolve surface oxides. On the other hand, Bakar et al [ 91 ] discovered that cleaning Ni foam with HCl aq.…”

Section: Resultsmentioning

confidence: 99%

“…Ni foam is a popular porous substrate praised for its conductivity, high specific surface area, and low cost. It is often used when investigating active materials for supercapacitor applications, mainly as a substrate for metal oxides as anodes [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 ]. In this work, Ni foam was used as a substrate for NiMn 2 O 4 and Ni-Mg ferrites to investigate their energy storage properties.…”

Section: Introductionmentioning

confidence: 99%

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Supercapacitor Electrodes: Is Nickel Foam the Right Substrate for Active Materials?

Dojčinović,

Stojković Simatović,

Nikolić

2024

Materials

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Ni foam is an extensively used current collector and substrate in investigations of electrochemically active materials such as supercapacitors and electrocatalysts for oxygen and hydrogen evolution reactions. This material is relatively cheap, porous, and conductive and has a large specific surface area, all of which make it a good substrate. We investigated Ni-Mg ferrites and NiMn2O4 as active materials for electrochemical energy storage. These materials, when loaded on Ni foam, gave promising capacitance values: 172 F/g (at 2 mV/s) for NiMn2O4 in 6 M KOH and 242 F/g (at 2 mV/s) for MgFe2O4 in 3 M KOH. Nevertheless, during the authors’ work, many experimental problems occurred. Inconsistencies in the results directed further investigation towards measuring the capacitance of the active materials using GCE and platinum electrodes as substrates to discover if Ni foam was the culprit of the inconsistencies. When non-nickel substrates were used, both NiMn2O4 and MgFe2O4 showed reduced capacitance. Experimental problems associated with the utilization of Ni foam as a substrate for active materials in supercapacitor electrodes are discussed here, combined with other problems already addressed in the scientific literature.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Supercapacitor Electrodes: Is Nickel Foam the Right Substrate for Active Materials?

Dojčinović,

Stojković Simatović,

Nikolić

2024

Materials

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“…reported core‐shell carbon fibre@Co 1.5 Mn 1.5 O 4 composite electrode consisting of redox‐active shell (Co 1.5 Mn 1.5 O 4 ) and conductive core (carbon fiber). [ 147 ] Benefitted by the synergies between component materials, the core‐shell structured electrode exhibited a capacitance of 384 F/g at 0.28 A/g in half‐cell configuration, along with a good cycling stability, similar 3D spinel‐based composite electrodes like VCFs@MnCo 2 O 4 , [ 148 ] have shown improved specific capacity of 48.4 mAh/g at 2 A/g as compared to pristine MnCo 2 O 4 , indicating effectiveness of the process of composite formation to get the benefit from individual component materials.…”

Section: Application Of Tmos and Their Composites In Supercapacitorsmentioning

confidence: 99%

Nanoarchitectured transition metal oxides and their composites for supercapacitors

Kumar

Rathore

Sarkar

et al. 2021

Electrochemical Science Adv

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Supercapacitors have acquired a considerable scientific and technological position in the energy storage field owing to their compelling power capability, good energy density, excellent cycling stability, and ideal safety. The supercapacitor is the burgeoning candidate to cope with the ever-growing need for green and renewable energy. High-performance supercapacitors are realized by nanostructured electrode designs, which provide ameliorated surface area for abundant electrode-electrolyte interaction, ease of electron transfer and movement, and short ion-diffusion pathways that lead to increased performance. In this regard, transition metal oxide (TMO)-based electroactive materials are of significant interest owing to the remarkable combination of structural, mechanical, electrical, and electrochemical properties. Besides their high specific capacitance and energy density due to rich redox chemistry, highly reversible and fast charge-discharge processes, low cost due to abundance, and environmentfriendliness make them the most promising materials for next-generation supercapacitors. But poor electrical conductivity and rate capability, inferior cycling life, and low power density are some of the major challenges that need to be addressed. Therefore, various nanostructures of pristine TMOs and their composites with other materials with complementary characteristics have been fabricated and investigated to realize supercapacitors with improved performance.This review summarizes all such reported pristine TMOs with different nanostructured dimensions namely, 3D, 2D, 1D, and 0D, and their composite structures for their application as electrode materials in supercapacitors. Design of different pristine and composite nanostructures, synthesis strategies, comprehensive structure-dependent electrochemical properties, present challenges, and future perspectives are reviewed.

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“…In recent years, as a typical electrode material for BTS, bimetallic oxide has attracted much attention due to its simple synthesis, variable oxidation state, low cost, high electrochemical stability and high chargedischarge rate [14][15][16][17][18]. Malaie et al [19] summarized the electrochemical performance for nano-ferrites such as Fe 3 O 4 , NiFe 2 O 4 , MnFe 2 O 4 , CoFe 2 O 4 , CuFe 2 O 4 and ZnFe 2 O 4 electrode materials for SCs in aqueous electrolytes, and these materials show the speci c capacity (C s ) between 137-517 F g − 1 at a current density (CD) of 1 A g − 1 .…”

Section: Introductionmentioning

confidence: 99%

Controllable synthesis of spherical S@CoMn2O4 battery-type electrode material for hybrid supercapacitors

Lv,

Min,

Liu

et al. 2023

Preprint

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A novel spherical Co-Mn composite -CoMn2O4 was synthesized via a one-step solvothermal method, and S doping CoMn2O4 (S@CoMn2O4) battery-type electrode material was further obtained via a hydrothermal vulcanization. This ion exchange technique is mainly carried out on the surface of the material and will not destroy the morphology of the original oxide-MOF, so the obtained materials generally have a core-shell structure. The S@CoMn2O4 not only remains a spherical character, but also possesses a coarser surface and porous structure, which considerably increases the specific surface areas (SSA) and electrochemical active sites (EAS) for electrode materials, thus facilitating the charge transfer kinetics for ions and electrons. When the current density (CD) is 1 A g-1, the specific capacity (Cs) of S@CoMn2O4 is 812 C g-1. Moreover, S@CoMn2O4 has excellent electrochemical cycling performance, and the retention rate of Cs for the S@CoMn2O4 reach 92.91% after 5000 cycles at 10 A g-1. When the specific power (Ps) is 775 W kg-1, the specific energy (Es) for S@CoMn2O4//AC device reaches 44.36 Wh kg-1.

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Solvothermal-derived nanoscale spinel bimetallic oxide particles rationally bridged with conductive vapor-grown carbon fibers for hybrid supercapacitors

Cited by 21 publications

References 26 publications

Supercapacitor Electrodes: Is Nickel Foam the Right Substrate for Active Materials?

Supercapacitor Electrodes: Is Nickel Foam the Right Substrate for Active Materials?

Nanoarchitectured transition metal oxides and their composites for supercapacitors

Controllable synthesis of spherical S@CoMn2O4 battery-type electrode material for hybrid supercapacitors

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