Metal phosphides: topical advances in the design of supercapacitors

Agarwal, Akanksha; Sankapal, Babasaheb R.

doi:10.1039/d1ta04104e

Cited by 89 publications

(50 citation statements)

References 200 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High endurance to long-term charge–discharge is a prerequisite of the working electrode to be used for real supercapacitor operations. Since the cyclic stability of redox-active materials is not as good as EDLC, the use of MWCNT as a skeleton is believed to strengthen the mechanical integrity of the hybridized electrode Figure d shows the retention plot as a function of cycle numbers for the Co 2 P 2 O 7 /MWCNT electrode where the specific capacity equivalent to a 100% retention corresponds to the value achieved in the first GCD cycle of the stability test conducted for a constant current density of 3.5 A g –1 , which is 153.8 mA h g –1 (261.5 μA h cm –2 ).…”

Section: Resultsmentioning

confidence: 73%

Carbon Nanotube-Functionalized Surface-Assisted Growth of Cobalt Phosphate Nanodots: A Highly Stable and Bendable All-Solid-State Symmetric Supercapacitor

2022

Self Cite

View full text Add to dashboard Cite

Phosphate compounds have sparked the scenario and emerged as new electrode materials for energy storage systems due to their high redox chemistry. However, these materials suffer from sluggish electrode kinetics and low utilization efficiency, resulting in subpar storage performance. Herein, we report a facile and cost-efficient chemical method for directly anchoring cobalt phosphate (Co2P2O7) nanodots onto multiwalled carbon nanotubes (MWCNT) to design a multifaceted Co2P2O7/MWCNT core–shell-type structure. The as-designed heterostructure with dual charge storage profiles provides a high level of intercomponent synergy, promoting the occurrence of extrinsic pseudocapacitance. By ensuring continuous charge transfer pathways for sustained electrochemical performance, MWCNT support excellent electronic conductivity with good resilience to the dependability of Co2P2O7, resulting in exceptional mechanical robustness. The Co2P2O7/MWCNT exhibits significantly improved specific capacity and rate performance, outperforming pristine MWCNT. The assembled flexible all-solid-state symmetric supercapacitor device with a Co2P2O7/MWCNT electrode and a freestanding PVA-KOH electrolyte membrane possesses an exceptional specific energy of 57.3 W h kg–1 with good power output. Moreover, as a result of the well-interwoven all-solid-state assembly, the device displays commendable cyclic stability with a retention of 105% even at 5000 cycles, along with good deformable compatibility. The lighting up of 21 red light-emitting diodes provides practical evidence for the as-fabricated device’s applicability in current miniaturized electronics.

show abstract

Section: Resultsmentioning

confidence: 73%

Carbon Nanotube-Functionalized Surface-Assisted Growth of Cobalt Phosphate Nanodots: A Highly Stable and Bendable All-Solid-State Symmetric Supercapacitor

2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…The CV curves of C 1 , MC 2 , MC 4 , and MC 6 electrodes showed redox peaks at all scan rates prominently indicating pseudocapacitor like response material [40,41] . Despite this, CV profiles aren′t exactly rectangular, indicating quasi‐ideal capacitive/ pseudocapacitor behaviour.…”

Section: Resultsmentioning

confidence: 97%

“…In order to determine the total charge stored by any electrode, there are two major factors that must be considered: surface capacitive and diffusion‐controlled processes. The surface‐controlled kinetics includes non‐faradic charge storage in the EDL, and diffusion kinetics involves highly localized faradic electron transfer reactions at the electrode surface [40,41] . Complete analysis of dynamics was calculated based on power law to quantify their relative contribution as shown in equation (2) [41,42] .…”

Section: Resultsmentioning

confidence: 99%

Spray Synthesized Mn‐doped CuO Electrodes for High Performance Supercapacitor

Kadam

et al. 2022

ChemistrySelect

View full text Add to dashboard Cite

A pristine copper oxide and manganese-doped copper oxide nanostructured films were prepared by simple spray pyrolysis technique. A study of the effects of Mn doping with three different concentrations as 2, 4, and 6 wt % were studied in the view of enhancement of supercapacitive performance of copper oxide electrode. The 6 wt % manganese-doped copper oxide thin film changed their surface morphology considerably favorable to the exchange of ions in the Na 2 SO 4 electrolyte. The electrochemical properties of the pristine copper oxide and manganese-doped copper oxide were investigated in 1 M Na 2 SO 4 electrolyte within the potential window of À 1.0 to 0.4 V. A maximum specific capacitance of 801.61 F/g was obtained for the manganese-doped copper oxide thin film electrode.

show abstract

“…Several studies have reported the redox reaction mechanism of nickel phosphides in an aqueous solution [29][30][31][32][33]; however, there is still no solid consensus as to the redox reaction mechanism of nickel phosphides in an aqueous solution, except for the active participation of hydroxyl ions in the reaction. It is suggested that the following irreversible (Equation ( 5)) and reversible (Equation ( 6)) reactions take place when nickel phosphides are in an alkaline solution.…”

Section: Electrochemical Testsmentioning

confidence: 99%

Preparation of Magnetically Driven Nickel Phosphide Nanowires and Their Electrochemical Properties

Kim

Shin

2021

Applied Sciences

View full text Add to dashboard Cite

In this study, nickel phosphide nanowires with various structures and compositions were fabricated for the first time via magnetically-assisted liquid phase synthesis. The curvature and aspect ratio of the nanowires largely depended on the strength of the magnetic field applied during synthesis. Their phosphorus content together with the morphology were significantly modified according to the pH and reducing agent concentration. Nanowires with different structures and phosphorus contents were preliminarily tested for their capabilities to serve in general electrochemical applications. The degree of reaction (i.e., amount of reaction charge) increased with increases in the reaction area and phosphorus content of the nanowires. The rate characteristics of the reaction showed a peculiar increasing trend for a small reaction surface area and low phosphorus content. A change in the ohmic overpotential according to the nanowire curvature (aspect ratio) and porosity was suggested to be the reason for this unusual trend. Electrodes with high phosphorus contents or high reaction surface areas rapidly deteriorated during repetitive redox reactions. Based on the results for the degradation degree, the effect of the reaction surface area dominated that of the phosphorus content in the deterioration of the nickel phosphide nanowires.

show abstract

Metal phosphides: topical advances in the design of supercapacitors

Abstract: World-wide increased energy consumption and demand has aimed our prime requisites of high-energy storage systems with longer life. Hence, research and development on supercapacitors based on efficient and robust electrode...

Cited by 89 publications

References 200 publications

Carbon Nanotube-Functionalized Surface-Assisted Growth of Cobalt Phosphate Nanodots: A Highly Stable and Bendable All-Solid-State Symmetric Supercapacitor

Carbon Nanotube-Functionalized Surface-Assisted Growth of Cobalt Phosphate Nanodots: A Highly Stable and Bendable All-Solid-State Symmetric Supercapacitor

Spray Synthesized Mn‐doped CuO Electrodes for High Performance Supercapacitor

Preparation of Magnetically Driven Nickel Phosphide Nanowires and Their Electrochemical Properties

Contact Info

Product

Resources

About