TY - JOUR
T1 - Neutron imaging of a commercial Li-ion battery during discharge
T2 - Application of monochromatic imaging and polychromatic dynamic tomography
AU - Butler, Leslie G.
AU - Schillinger, Burkhard
AU - Ham, Kyungmin
AU - Dobbins, Tabbetha A.
AU - Liu, Ping
AU - Vajo, John J.
N1 - Funding Information:
L.G.B. thanks the support of the National Science Foundation ( CHE-0910937 ) for support of materials science tomography. The authors especially thank Dr. Adel Faridani for assistance with the reconstruction algorithm for the irregularly spaced projections and Dr. Michael Schulz for allowing them to modify the instrument acquisition software for use with the Greek golden ratio angle sequence. P.L. and J.J.V. acknowledge support from the Center on Nanostructuring for Efficient Energy Conversion (CNEEC) at Stanford University, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001060.
PY - 2011/9/21
Y1 - 2011/9/21
N2 - A commercial lithium-ion polymer battery of prismatic construction was imaged in 2D by monochromatic neutron radiography at wavelengths around a LiC6 spectral feature. Over the range of 34 Å, the neutron attenuation spectra for charged and discharged batteries are distinctly different. In a real-time experiment, a battery was observed during discharge at wavelengths spanning the LiC6 spectral feature and its disappearance monitored. No evidence of staging was detected in this preliminary experiment. A similar battery was imaged in 3D with a new tomographic data acquisition scheme based on the Greek golden ratio; the scheme allows convenient post-processing to establish time windows for 3D image reconstruction. The 3D images at 5% state of charge intervals are compromised by beam hardening, but still show some asymmetric battery volume change with discharge. Finally comments on the future of neutron imaging for battery experiments, whether at continuous sources at nuclear reactors or at pulsed spallation sources, are discussed.
AB - A commercial lithium-ion polymer battery of prismatic construction was imaged in 2D by monochromatic neutron radiography at wavelengths around a LiC6 spectral feature. Over the range of 34 Å, the neutron attenuation spectra for charged and discharged batteries are distinctly different. In a real-time experiment, a battery was observed during discharge at wavelengths spanning the LiC6 spectral feature and its disappearance monitored. No evidence of staging was detected in this preliminary experiment. A similar battery was imaged in 3D with a new tomographic data acquisition scheme based on the Greek golden ratio; the scheme allows convenient post-processing to establish time windows for 3D image reconstruction. The 3D images at 5% state of charge intervals are compromised by beam hardening, but still show some asymmetric battery volume change with discharge. Finally comments on the future of neutron imaging for battery experiments, whether at continuous sources at nuclear reactors or at pulsed spallation sources, are discussed.
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U2 - 10.1016/j.nima.2011.03.023
DO - 10.1016/j.nima.2011.03.023
M3 - Article
AN - SCOPUS:80052763344
SN - 0168-9002
VL - 651
SP - 320
EP - 328
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 1
ER -