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Quantifying electron transport in aggregated colloidal suspensions in the strong flow regime

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America

Electron transport in complex fluids, biology, and soft matter is a valuable characteristic in processes ranging from redox reactions to electrochemical energy storage. These processes often employ conductor–insulator composites in which electron transport properties are fundamentally linked to the microstructure and dynamics of the conductive phase. While microstructure and dynamics are well recognized as key determinants of the electrical properties, a unified description of their effect has yet to be determined, especially under flowing conditions. In this work, the conductivity and shear viscosity are measured for conductive colloidal suspensions to build a unified description by exploiting both recent quantification of the effect of flow-induced dynamics on electron transport and well-established relationships between electrical properties, microstructure, and flow. These model suspensions consist of conductive carbon black (CB) particles dispersed in fluids of varying viscosities and dielectric constants. In a stable, well-characterized shear rate regime where all suspensions undergo self-similar agglomerate breakup, competing relationships between conductivity and shear rate were observed. To account for the role of variable agglomerate size, equivalent microstructural states were identified using a dimensionless fluid Mason number, Mn f , which allowed for isolation of the role of dynamics on the flow-induced electron transport rate. At equivalent microstructural states, shear-enhanced particle–particle collisions are found to dominate the electron transport rate. This work rationalizes seemingly contradictory experimental observations in literature concerning the shear-dependent electrical properties of CB suspensions and can be extended to other flowing composite systems.

Research Organization:
Northwestern Univ., Evanston, IL (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC)
Grant/Contract Number:
SC0022119
OSTI ID:
2429474
Alternate ID(s):
OSTI ID: 2578637
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 34 Vol. 121; ISSN 0027-8424
Publisher:
Proceedings of the National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English

References (52)

Fluid‐Dynamics‐Processed Highly Stretchable, Conductive, and Printable Graphene Inks for Real‐Time Monitoring Sweat during Stretching Exercise journal March 2021
Semi-Solid Lithium Rechargeable Flow Battery journal May 2011
Dielectric Spectroscopy of Reversibly Flocculated Dispersions during Flow journal June 1994
Broadband Dielectric Spectroscopy book January 2003
Konsistenzmessungen von Gummi-Benzollösungen journal August 1926
Nanodispersions of conducting particles: preparation, microstructure and dielectric properties journal February 1999
Viscosity and aggregation structure of nanocolloidal dispersions journal September 2012
Transport of electric charge in low dielectric constant fluids journal March 1964
Dielectric behaviour of flowing thixotropic suspensions journal January 1987
Thixotropy—a review journal May 1997
Electron hopping through proteins journal November 2012
Promising aqueous dispersions of carbon black for semisolid flow battery application journal September 2022
A novel manufacturing method for aligned discontinuous fibre composites (High Performance-Discontinuous Fibre method) journal October 2014
Electromagnetic shielding of polymer–matrix composites with metallic nanoparticles journal September 2011
Rheological and electrical behaviour of nanocarbon/poly(lactic) acid for 3D printing applications journal June 2019
Stress jumps on weakly flocculated dispersions: Steady state and transient results journal July 2005
Evaluating the Rheo-electric Performance of Aqueous Suspensions of Oxidized Carbon Black journal March 2023
Electrically conductive hydrogels for flexible energy storage systems journal January 2019
Colloidal Suspension Rheology book January 2011
Collective diffusion in sheared colloidal suspensions journal February 2008
Mechanical History Dependence in Carbon Black Suspensions for Flow Batteries: A Rheo-Impedance Study journal February 2017
Clustering and Percolation in Suspensions of Carbon Black journal August 2017
Correlating Processing Conditions to Short- and Long-Range Order in Coating and Drying Lithium-Ion Batteries journal November 2020
Maximum Conductivity of Packed Nanoparticles and Their Polymer Composites journal January 2009
Effect of Oxidation of Carbon Material on Suspension Electrodes for Flow Electrode Capacitive Deionization journal February 2015
Electron Tunneling through Fluid Solvents journal April 2007
Highly Stretchable and Sensitive Strain Sensor Based on Silver Nanowire–Elastomer Nanocomposite journal April 2014
Materials for suspension (semi-solid) electrodes for energy and water technologies journal January 2015
Design of yield-stress fluids: a rheology-to-structure inverse problem journal January 2017
In situ investigation of the rheological and dielectric properties of a cross-linking carbon nanotube-thermosetting epoxy journal January 2023
Highly anisotropic vorticity aligned structures in a shear thickening attractive colloidal system journal January 2008
Non-aqueous carbon black suspensions for lithium-based redox flow batteries: rheology and simultaneous rheo-electrical behavior journal January 2013
Rheopexy and tunable yield stress of carbon black suspensions journal January 2013
Equation of State for Nonattracting Rigid Spheres journal July 1969
A strain-controlled RheoSANS instrument for the measurement of the microstructural, electrical, and mechanical properties of soft materials journal October 2017
Long-range electron transfer journal February 2005
Quantifying the hydrodynamic contribution to electrical transport in non-Brownian suspensions journal July 2022
Electron transport and ac electrical properties of carbon black polymer composites journal August 2001
Tunnelling and percolation in lattices and the continuum journal March 2009
Simultaneous Rheoelectric Measurements of Strongly Conductive Complex Fluids journal December 2016
Critical behavior of the electrical transport properties in a tunneling-percolation system journal May 1999
Solution of the tunneling-percolation problem in the nanocomposite regime journal April 2010
Shear thickening and scaling of the elastic modulus in a fractal colloidal system with attractive interactions journal June 2008
Scaling of the Viscoelasticity of Weakly Attractive Particles journal July 2000
Large scale anisotropies in sheared colloidal gels journal March 2018
Structure-property relationships of sheared carbon black suspensions determined by simultaneous rheological and neutron scattering measurements journal May 2019
A Mechanism for Non‐Newtonian Flow in Suspensions of Rigid Spheres journal March 1959
Flow properties and electrical conductivity of carbon black–linseed oil suspension journal February 1990
Direct measurements of the microstructural origin of shear-thinning in carbon black suspensions journal March 2021
New insights on carbon black suspension rheology—Anisotropic thixotropy and antithixotropy journal September 2022
Rheo-electric measurements of carbon black suspensions containing polyvinylidene difluoride in N-methyl-2-pyrrolidone journal March 2023
Effect of steady shear deformation on electrically conductive PP/PS/MWCNT composites journal July 2023

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