Mahla Bakhshi

Researcher Department of Engineering Sciences

Email: mahla.bakhshi@uia.no
Phone: +47 37 23 37 00

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Areas of responsibility

I am a Ph.D. research fellow working in Battery Coast Team. My educational background is in applied and engineering physics with a focus on energy science. It is my main interest to research Li-ion batteries, which is where my work experience lies.

Research

Lithium-Ion Batteries, Battery Testing, parameterization, and modelling, Electrochemistry

Academic interests

Relevent Work

02/2022 - 10/2022: Battery Technology Analyst
Battronics Engineering, Munich, Germany (remote)

11/2020 - 11/2021:     Master Thesis Student at Chair for Technical Electrochemistry
                               Technical University of Munich, Garching, Germany
                               Topic: Invesgation of Solid Diffusion in Graphite, Comparing                Simulations and Measurements

04/2020 - 10/2020: Battery Research Intern
Hilti Deutschland AG, Kaufering, Germany

Education

10/2018 - 10/2022: M.Sc. Applied and Engineering Physics
Technical University of Munich, Garching, Germany

01/2013 - 01/2017: B.Sc. Applied and Engineering Physics
Alzahra University, Tehran, Iran

Research groups

Battery Technology Group

Bakhshi, Mahla; Zhao, Yuqing; Taghizadegan, Parham; Johnson, Michel B.; Landesfeind, Johannes & Metzger, Michael [Show all 7 contributors for this article] (2026). Spatially Resolved X-ray Fluorescence for Quantifying Electrolyte Salt Distribution in Lithium-Ion Batteries. Journal of the Electrochemical Society. ISSN 0013-4651. 173(17). doi: 10.1149/1945-7111/ae9df8. Full text in Research Archive Show summary
Electrolyte motion–induced salt inhomogeneity (EMSI) is a critical degradation mechanism that can limit lifetime of large-format lithium-ion cells. Here, ex-situ scanning micro–X-ray fluorescence (µ-XRF) spectroscopy is employed to map electrolyte salt concentration across entire electrodes harvested from 18 650 cells. Lithium hexafluoroarsenate (LiAsF6) is used as a spectroscopically favorable salt, enabling arsenic fluorescence as an indicator of local salt concentration. Transport properties of LiAsF6 are shown, via Advanced Electrolyte Model calculations, to closely match those of LiPF6 in relevant carbonate solvents, validating its use as a surrogate salt for this technique. We confirm that the measured As distributions reflect true electrolyte salt concentration by tracking their growth and relaxation over cycling and rest, and by showing consistent patterns across the separator–anode–cathode stack, indicating a cell-level redistribution of salt. The maps reveal that the axial salt gradient along the entire length of the anode is strongly non-uniform. We observe pronounced tab-correlated banding and localized salt-depleted regions beneath the tab, which we interpret as signatures of pressure-dependent electrolyte pumping and tab-driven modulation of EMSI. This work establishes µ-XRF mapping of LiAsF6 as a powerful new technique to quantify electrolyte salt distributions with high spatial resolution.

View all works in NVA

Bakhshi, Mahla; Sivasengaran, Ashvini Nair & Landesfeind, Johannes (2023). Three-Electrode Coin Cell with Gold Micro-Reference Electrode. Full text in Research Archive

View all works in NVA

Published Apr. 16, 2024 11:35 AM