Journal article
Visualizing and Quantifying Electronic Accessibility in Composite Battery Electrodes using Electrochemical Fluorescent Microscopy
Journal of the Electrochemical Society, v 171(10)
30 Sep 2024
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Abstract Electronic connections between active material particles and the conductive carbon-binder-domain govern the rate capability and lifetime of high-energy commercial Li-ion batteries (LIB). This work develops an in-situ electrochemical fluorescent microscopy (EFM) technique that maps fluorescence intensity to these local electronic connections. Specifically, rapid redox kinetics of an electrofluorophore translates to reaction distributions that are limited by electronic accessibility of battery electrode regions and individual active material particles. This technique can visualize hot-spots, dead zones, and isolated particles on the electrode surface. EFM characterization of a series of LiNi0.33Mn0.33Co0.33O2 electrodes across processing parameters finds a significant negative correlation between the number of disconnected active particles and the rate capability. This low-cost technique provides quantitative mesoscale characterization of commercial LIB electrodes with fast throughput (<60 s) to facilitate rapid research and development and provide manufacturing quality control.
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Details
- Title
- Visualizing and Quantifying Electronic Accessibility in Composite Battery Electrodes using Electrochemical Fluorescent Microscopy
- Creators
- Karla NegreteMaureen Tang
- Publication Details
- Journal of the Electrochemical Society, v 171(10)
- Publisher
- ELECTROCHEMICAL SOC INC; PENNINGTON
- Number of pages
- 5
- Grant note
- National Science Foundation: CBET-1751553
This work was supported by the National Science Foundation CBET-1751553. We acknowledge Dr. Andrew Wong of Lawrence Livermore National Laboratory, Dr. Harini Sreenivasappa, and Prof. Aaron Fafarman of Drexel University for their helpful discussions. We also would like to acknowledge Renee M. Saraka of Arkema for the in-house electrode samples and Rayan Alaufey of Drexel University for helping acquire SEM micrographs.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:001336996700001
- Scopus ID
- 2-s2.0-85207315054
- Other Identifier
- 991021906083304721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Electrochemistry
- Materials Science, Coatings & Films