In Situ Double Probe Beam Deflection Estimating Concentration Profiles of Battery Electrolytes
Year: 2025
Type: article
Abstract: An in situ double probe beam deflection (PBD) technique has been developed using two laser beams to map the concentration profile of the diffusion layer in an electrochemical cell. A microscale moving upper probe and a fixed position secondary beam offer real-time concentration gradients to be profiled throughout the depth of the diffusion layer. The double PBD technique was used to plot concentration profiles for 0.1 mol kg−1 CuSO4 and ZnSO4 within a range of applied currents, showing increased magnitudes of gradients for higher currents. Both single and double beam PBD were explored, demonstrating the distance and time dependence of the developing concentration gradient. While CuSO4 showed a systematic trend of increased response delay and decreased deflection with increased distance from the electrode, ZnSO4 experienced some additional phenomena affecting the refractive index within the diffusion layer. The in situ double probe beam deflection was shown to be highly sensitive and offers future work in quantifying charge migration within this important region of the electrochemical cell.
Institution: University of Nevada, Las Vegas
Language: English
Subfield: Electrochemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $1,950
Awards: Collaborative Research: Characterization of Transport Properties and Microstructures of Battery Electrolytes via In Situ Spectroscopy, RII-BEC: Enhancing the Transition of COVID-19 Disadvantaged Students from Undergraduate to Graduate Studies in STEM through Multi-Year Undergraduate Research Experiences
OpenAlex ID: W4409231789