TY - JOUR
T1 - Mapping oscillating magnetic fields around rechargeable batteries
AU - Benders, Stefan
AU - Mohammadi, Mohaddese
AU - Ganter, Matthew J.
AU - Klug, Christopher A.
AU - Jerschow, Alexej
N1 - Publisher Copyright:
© 2020 Elsevier Inc.
PY - 2020/10
Y1 - 2020/10
N2 - Power storage devices such as batteries are a crucial part of modern technology. The development and use of batteries has accelerated in the past decades, yet there are only a few techniques that allow gathering vital information from battery cells in a nonivasive fashion. A widely used technique to investigate batteries is electrical impedance spectroscopy (EIS), which provides information on how the impedance of a cell changes as a function of the frequency of applied alternating currents. Building on recent developments of inside-out MRI (ioMRI), a technique is presented here which produces spatially-resolved maps of the oscillating magnetic fields originating from the alternating electrical currents distributed within a cell. The technique works by using an MRI pulse sequence synchronized with a gated alternating current applied to the cell terminals. The approach is benchmarked with a current-carrying wire coil, and demonstrated with commercial and prototype lithium-ion cells. Marked changes in the fields are observed for different cell types.
AB - Power storage devices such as batteries are a crucial part of modern technology. The development and use of batteries has accelerated in the past decades, yet there are only a few techniques that allow gathering vital information from battery cells in a nonivasive fashion. A widely used technique to investigate batteries is electrical impedance spectroscopy (EIS), which provides information on how the impedance of a cell changes as a function of the frequency of applied alternating currents. Building on recent developments of inside-out MRI (ioMRI), a technique is presented here which produces spatially-resolved maps of the oscillating magnetic fields originating from the alternating electrical currents distributed within a cell. The technique works by using an MRI pulse sequence synchronized with a gated alternating current applied to the cell terminals. The approach is benchmarked with a current-carrying wire coil, and demonstrated with commercial and prototype lithium-ion cells. Marked changes in the fields are observed for different cell types.
KW - Alternating current
KW - Current imaging
KW - Oscillating field
KW - Rechargeable batteries
KW - Triggered acquisition
UR - http://www.scopus.com/inward/record.url?scp=85090403699&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85090403699&partnerID=8YFLogxK
U2 - 10.1016/j.jmr.2020.106811
DO - 10.1016/j.jmr.2020.106811
M3 - Article
C2 - 32920429
AN - SCOPUS:85090403699
SN - 1090-7807
VL - 319
JO - Journal of Magnetic Resonance
JF - Journal of Magnetic Resonance
M1 - 106811
ER -