Suppressing Lithium Migration in a Carbon Fiber Negative Electrode During Atom Probe Tomography Analysis
Journal article, 2024

Carbon fibers can play dual roles, carrying mechanical load and hosting lithium (Li) simultaneously in multifunctional devices called structural batteries. It is essential to gain a detailed understanding on the interaction between Li and carbon fibers on the nanoscale. Atom probe tomography (APT) can potentially reveal individual Li and C atoms. However, lithiated carbon fibers experience massive Li migration once exposed to the electric field in the APT instrument. We show that a few nanometers of a chromium (Cr) coating on APT specimens can shield the electric field and suppress the massive Li migration. The related effects of the Cr coating, such as introduction of oxygen, enhanced mass resolving power of the mass spectrum, and increased portion of single hits, are also discussed. Graphical Abstract

conductive coating

multifunctional composites

delithiation

structural batteries

Author

Marcus Johansen

Chalmers, Industrial and Materials Science, Materials and manufacture

Mahander P. Singh

Max Planck Institute of Materials research

B. Gault

Imperial College London

Max Planck Institute of Materials research

Fang Liu

Chalmers, Industrial and Materials Science, Materials and manufacture

Microscopy and Microanalysis

1431-9276 (ISSN) 1435-8115 (eISSN)

Vol. In Press

Areas of Advance

Transport

Energy

Materials Science

Subject Categories

Materials Chemistry

Other Materials Engineering

DOI

10.1093/mam/ozae058

PubMed

39027925

More information

Latest update

8/8/2024 8