Quantifying the hydrodynamic contribution to electrical transport in non-Brownian suspensions.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 35858346.
- Also identified by DOI 10.1073/pnas.2203470119 and PMC identifier 9303984.
- Licence recorded as CC BY-NC-ND.
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Abstract
Electrical transport in semiconducting and metallic particle suspensions is an enabling feature of emerging grid-scale battery technologies. Although the physics of the transport process plays a key role in these technologies, no universal framework has yet emerged. Here, we examine the important contribution of shear flow to the electrical transport of non-Brownian suspensions. We find that these suspensions exhibit a strong dependence of the transport rate on the particle volume fraction and applied shear rate, which enables the conductivity to be dynamically changed by over 10<sup>7</sup> decades based on the applied shear rate. We combine experiments and simulations to conclude that the transport process relies on a combination of charge and particle diffusion with a rate that can be predicted using a quantitative physical model that incorporates the self-diffusion of the particles.