Thermoelectric effect and temperature-gradient-driven electrokinetic flow of electrolyte solutions in charged nanocapillaries

Zhang, Wenyao; Wang, Qiuwang; Zeng, Min; Zhao, Cunlu

doi:10.1016/j.ijheatmasstransfer.2019.118569

Cited by 35 publications

(37 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, we consider the system is under elevated isothermal situation only in this work. Otherwise, the thermodiffusion effect or the Soret effect may play an important role on ion transport [40][41][42][43][44]. Figure 2B demonstrates that the acquired surface charge (σ 0 ) enhances by increasing the solution temperature.…”

Section: Resultsmentioning

confidence: 99%

Temperature effects on electrical double layer at solid‐aqueous solution interface

Alizadeh

Wang

2020

Electrophoresis

View full text Add to dashboard Cite

Despite the significant influence of solution temperature on the structure of electrical double layer, the lack of theoretical model intercepts us to explain and predict the interesting experimental observations. In this work, we study the structure of electrical double layer as a function of thermochemical properties of the solution by proposing a phenomenological temperature dependent surface complexation model. We found that by introducing a buffer layer between the diffuse layer and stern layer, one can explain the sensitivity of zeta potential to temperature for different bulk ion concentrations. Calculation of the electrical conductance as function of thermochemical properties of solution reveals the electrical conductance not only is a function of bulk ion concentration and channel height but also the solution temperature. The present work model can provide deep understanding of micro‐ and nanofluidic devices functionality at different temperatures.

show abstract

Section: Resultsmentioning

confidence: 99%

Temperature effects on electrical double layer at solid‐aqueous solution interface

Alizadeh

Wang

2020

Electrophoresis

View full text Add to dashboard Cite

show abstract

“…Here, the value of χ is ion-specific. For typical electrolyte solutions like aqueous KCl, NaCl, LiCl, the value of χ ranges between ~ -0.3 to 0 (approximately) (Zhang et al 2019) and we have chosen the range of χ accordingly while presenting the results.…”

Section: Effect Of Axial Temperature Gradientmentioning

confidence: 99%

“…Also, the determination of the temperature field may require the knowledge of other effects like heat generation due to induced streaming field or viscous dissipation which in turn affect fluid physical properties and convective contribution to the temperature distribution. Apart from this, contrary to the conventional electrokinetic studies, the assumption of mechanical equilibrium of ions within the electrical double layer (EDL) (under isothermal condition) is no longer valid where the effect of thermo-diffusion of ions needs to be incorporated in the transport equation of ionic species along with other components (Zhang et al 2019;Zhou et al 2015).…”

Section: Introductionmentioning

confidence: 99%

“…This condition is itself another source of non-linearity in the analysis where both conduction and streaming current undergo drastic alteration under the influence of finite temperature difference. In addition, it is noteworthy to mention that, when an electrolyte solution is subjected to an imposed temperature gradient, a thermo-electric field is induced by virtue of the movement of ions in response to the thermal driving force, commonly known as Soret effect (Dietzel & Hardt 2016Ghonge et al 2013;Maheedhara et al 2018;Zhang et al 2019;Zhou et al 2015). Moreover, additional form of thermo-electric field can be induced within the system because of the diffusivity difference between the ions even if their Soret coefficients remain the same.…”

Section: Introductionmentioning

confidence: 99%

“…As such, the research focus in this domain has been directed primarily towards incorporating non-isothermal effects as a secondary force in the alteration of hydrodynamics of simple fluids (Chakraborty 2006;Garai & Chakraborty 2009;Huang & Yang 2006;Keramati et al 2016;Maynes & Webb 2003;Sadeghi et al 2011;Sánchez et al 2018;Tang et al 2003;Xuan et al 2004a;Xuan 2008;Xuan et al 2004b;Yavari et al 2012). Therefore, except for some limited physical scenarios, however, such an exclusive effect has not been utilized to a significant practical benefit (Dietzel & Hardt 2016Zhang et al 2019).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Temperature-gradient-induced massive augmentation of solute dispersion in viscoelastic micro-flows

2020

View full text Add to dashboard Cite

Lignin‐Derived Ionic Conducting Membranes for Low‐Grade Thermal Energy Harvesting

Muddasar,

Nasiri,

Cantarero

et al. 2023

Adv Funct Materials

View full text Add to dashboard Cite

Wood‐based ionic conductive membranes have emerged as a new paradigm for low‐grade thermal energy harvesting applications due to their unique andtailorable structures. Herein, a lignin‐derivedionic conducting membrane with hierarchical aligned channels is synthesized viaa double network crosslinking approach. Their excellent thermal stability andsuperior swelling ratio allow their optimization as low‐grade heat recovery technologies. Several vertically aligned nanoscaleconfinements are found in the synthesized membranes, contributing towardenhanced ionic diffusion. Among all the combinations, the membrane comprising69.2 wt.% of lignin and infiltrated with 0.5 m KOH exhibits anexceptional ionic figure of merit (ZTi) of 0.25, relatively higher ionic conductivity(51.5 mS cm‒1), lower thermal conductivity(0.195 W m‒1·K), and a remarkable ionic Seebeck coefficientof 5.71 mV K‒1 under the application of an axialtemperature gradient. A numerical model is also utilized to evaluate theveracity of experimental observations and to gain a better understanding of thefundamental mechanisms involved in attaining such values. These results displaythe potential of lignin‐basedmembranes for future thermal energy harvesting applications and are a new facetin thermoelectric energy conversion which is certain to pave the way forfurther investigations on sustainable ionic conductive membranes.

show abstract

Thermoelectric effect and temperature-gradient-driven electrokinetic flow of electrolyte solutions in charged nanocapillaries

Cited by 35 publications

References 44 publications

Temperature effects on electrical double layer at solid‐aqueous solution interface

Temperature effects on electrical double layer at solid‐aqueous solution interface

Temperature-gradient-induced massive augmentation of solute dispersion in viscoelastic micro-flows

Lignin‐Derived Ionic Conducting Membranes for Low‐Grade Thermal Energy Harvesting

Contact Info

Product

Resources

About