Theoretical prediction of a transient accumulation of nanoparticles at a well-defined distance from an electrified liquid–solid interface

Chan, Crystal; Kätelhön, Enno; Compton, Richard G.

doi:10.1039/c8nr05055d

Cited by 5 publications

(2 citation statements)

References 28 publications

(25 reference statements)

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“…The theoretical framework proposed by Chan et al., incorporates Nernst‐Planck equation to capture mass transport by diffusion and migration, the Gouy‐Chapman model for electrode‐electrolyte interface, and a hindered diffusion model that takes into account modification of Brownian motion due to presence of the interface. Migration and hindered diffusion are shown to compete with one another and this competition determines the tendency of particles to accumulate at the interface; thus providing a means to tune mass transport . Electronic percolation, vital for the functioning of SSRFBs, has also been elaborated theoretically.…”

Section: Origin Of Complexity In Ssrfbsmentioning

confidence: 99%

Interphases in Electroactive Suspension Systems: Where Chemistry Meets Mesoscale Physics

Shukla

Franco

2019

Batteries & Supercaps

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solid redox flow batteries (SSRFBs) consist of electrochemically active particle suspensions as electrodes and can potentially be applied to large scale energy storage. Invented just a decade ago, these batteries already face dwindling commercial value as they can be too complex to study systematically. This review illustrates the depth and width of the state of the art of knowledge that needs to be taken into account. Additionally, this work shows how SSRFBs are an embodiment of complex systems. Conventional theoretical paradigms, experimental tools, and modeling methods generally reduce the size of the problem to solve it. However, this is nearly impossible for highly complex systems with interdependent parameter relationships. This review shows how rheology plays a very significant role in impacting electrochemistry. It concluds that the fastest way to optimize SSRFBs is by obtaining as many experimentally observable parameters as possible using advanced simultaneous techniques, followed by incorporation of this multidisciplinary data into a unified theoretical framework.

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Section: Origin Of Complexity In Ssrfbsmentioning

confidence: 99%

Interphases in Electroactive Suspension Systems: Where Chemistry Meets Mesoscale Physics

Shukla

Franco

2019

Batteries & Supercaps

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“…The diffusion mass transfer is one of the important factors to ensure high-efficiency electrode reactions at the electrode/electrolyte interface. The mass transfer at the electrode/electrolyte interface is generally divided into three types: diffusion, electromigration, and convection, and the diffusion mass transfer plays a leading role according to the Nernst–Planck equation. − Therefore, it is expected to improve the diffusion coefficient of electrode reaction through electrode surface design and optimization, which is an important way to accelerate mass transfer kinetics.…”

Section: Introductionmentioning

confidence: 99%

Effect of Intrinsic Pore Distribution on Ion Diffusion Kinetics of Supercapacitor Electrode Surface

et al. 2022

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The electrolyte ion diffusion kinetics have an important impact on electrochemical energy storage. Herein, we report the effect of the intrinsic porosity of NiCoP on accelerating electrolyte ion diffusion kinetics and accommodating volume expansion during the charge/discharge process. The pore distribution model of electrode/electrolyte was designed and optimized by the finite element simulation, demonstrating the visualization and quantitative analysis of the diffusion process of the electrode/electrolyte interface with intrinsic porous structure. When the pore area ratio reached 50.01%, the theoretical diffusion coefficient of 1.41 × 10–11 m2 s–1 would be conducive to the rapid diffusion of electrolytes. The electrode gained a specific capacity of 2805 F g–1 at a current density of 1 A g–1 based on the measured diffusion coefficient (1.79 × 10–10 m2 s–1), superior to 1.44-times that of the pristine electrode. The diffusion barriers of intrinsic porous NiCoP (3.19 eV) and conventional NiCoP (47.10 eV) were calculated by the density functional theory calculations, respectively. The intrinsic porous NiCoP was prepared by the hydrothermal treatment, annealing, and phosphating processes. The pore distribution was regulated by the concentration of NaHCO3 as a pore-forming additive. This work combines simulations and experiments to form a method to optimize diffusion kinetics at the electrode/electrolyte interface.

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Nanoparticle impact electrochemistry

Sani

Tschulik

2021

Frontiers of Nanoscience

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Theoretical prediction of a transient accumulation of nanoparticles at a well-defined distance from an electrified liquid–solid interface

Cited by 5 publications

References 28 publications

Interphases in Electroactive Suspension Systems: Where Chemistry Meets Mesoscale Physics

Interphases in Electroactive Suspension Systems: Where Chemistry Meets Mesoscale Physics

Effect of Intrinsic Pore Distribution on Ion Diffusion Kinetics of Supercapacitor Electrode Surface

Nanoparticle impact electrochemistry

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