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 107 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.
| Original language | English (US) |
|---|---|
| Article number | e2203470119 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Volume | 119 |
| Issue number | 29 |
| DOIs | |
| State | Published - Jul 19 2022 |
Funding
ACKNOWLEDGMENTS. The rheo-electric measurements benefited from funding support from the National Science Foundation (CBET-2047365). H.L. was partially funded by the Department of Energy Basic Energy Science Program (#DE-SC0022119) and by Leslie and Mac McQuown through the Center for Engineering Sustainability and Resilience at Northwestern. We also would like to acknowledge the contribution of Matt Snell for his preliminary measurements on this project. M.V.M. was partially funded by the Skoltech - MIT Next Generation Program during this work.
Keywords
- Stokesian dynamics
- charge carrier diffusion
- electrical properties
- rheology
- suspensions
ASJC Scopus subject areas
- General