Elemental and Chemical Mapping of High Capacity Intermetallic Li-ion Anodes with Transmission X-ray Microscopy

Ausderau, Logan; Malabet, Hernando J. Gonzalez; Buckley, Joseph R.; Andrade, Vincent De; Liu, Yijin; Nelson, George J.

doi:10.1007/s11837-017-2416-5

Cited by 7 publications

(16 citation statements)

References 20 publications

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“…Furthermore, several particles with gray values within the same range to the Cu current collector are also clear in Figure b–d, suggesting the expulsion of Cu or the presence of intermediate products (Li 2 CuSn). The grayscale variation in proximity to fractures seen on the right area on Figure b,e mirrors the behavior seen in nanoscale XANES data, where phase segregation of Cu 6 Sn 5 , Cu, and Li 2 CuSn was observed near the fractures …”

Section: Results and Discussionsupporting

confidence: 64%

“…The samples did receive some exposure to the external atmosphere during transit and processing for μCT studies. However, a comparison of chemical and structural characteristics for samples exposed to ambient conditions and those strictly handled under inert atmosphere have shown no significant differences . Synchrotron-based μCT was performed on samples extracted from the composite electrodes at a resolution of 1.3 μm (0.65 μm pixel size) using beamline 2-BM-A at the Argonne National Laboratory Advanced Photon Source (APS).…”

Section: Methodsmentioning

confidence: 99%

“…No significant quantities of Sn or Cu oxides were observed. Further details of the alloy synthesis XRD and electrode fabrication are given in Ausderau et al 28 For electrochemical testing, two forms of electrodes were produced: pellet electrodes (13 mm diameter and 1 mm thick) and composite electrodes. Here, testing of composite electrodes is addressed.…”

Section: ■ Experimental Detailsmentioning

confidence: 99%

“…However, a comparison of chemical and structural characteristics for samples exposed to ambient conditions and those strictly handled under inert atmosphere have shown no significant differences. 28 Synchrotron-based μCT was performed on samples extracted from the composite electrodes at a resolution of 1.3 μm (0.65 μm pixel size) using beamline 2-BM-A at the Argonne National Laboratory Advanced Photon Source (APS). The μCT scans were performed in white beam mode with an exposure time of 50 ms per projection image.…”

Section: ■ Experimental Detailsmentioning

confidence: 99%

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Elucidating Lithium Alloying-Induced Degradation Evolution in High-Capacity Electrodes

Juarez-Robles

Malabet

L'Antigua

et al. 2018

ACS Appl. Mater. Interfaces

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Alloy electrode materials offer high capacity in lithium-ion batteries; however, they exhibit rapid degradation resulting in particle disintegration and electrochemical performance decay. In this study, the evolution of lithium alloying-induced degradation due to electrochemomechanical interactions is examined based on a multipronged electrochemical and microstructural analysis. Copper–tin (Cu6Sn5) is chosen as an exemplary alloy electrode material. Electrodes with compositional variations were fabricated, and electrochemical performance was examined under varying conditions including voltage window, C-rate, and short- and long-term cycling. Morphology and composition analyses of pristine and cycled electrodes were conducted using micrography and spectroscopy techniques. Alloying-induced electrode microstructural evolution was probed using X-ray microtomography. The rapid capacity fading was found to be caused by mechanical degradation of the electrode. Driving the electrode to a lower potential (E ≈ 0.2 V vs Li/Li+) induced Li–Sn alloy formation and provided the characteristic large capacity; however, this led to a large volume expansion and active particle cracking and disintegration. Copper expulsion was found to be a consequence of the alloy formation; however, it was not the primary contributor to the dramatic electrochemical performance decay.

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Section: Results and Discussionsupporting

confidence: 64%

Section: Methodsmentioning

confidence: 99%

Section: ■ Experimental Detailsmentioning

confidence: 99%

Section: ■ Experimental Detailsmentioning

confidence: 99%

See 2 more Smart Citations

Elucidating Lithium Alloying-Induced Degradation Evolution in High-Capacity Electrodes

Juarez-Robles

Malabet

L'Antigua

et al. 2018

ACS Appl. Mater. Interfaces

Self Cite

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“…Dr. Nelson's team has recently demonstrated the capability for spectroscopic imaging of these materials using a synchrotron X-ray source. 89 The observation of these changes during operation is being pursued. The effect of microstructural geometry on electrode performance is also being analyzed through experimental studies 90 and the use of nanotomography data as computational domains in finite element simulations.…”

Section: D X-ray Imaging For Aerospace Materials and Structuresmentioning

confidence: 99%

Propulsion Research and Academic Programs at the University of Alabama in Huntsville - 2018

Frederick

Ligrani

Thomas

2018

2018 Joint Propulsion Conference

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The UAH Propulsion Research Center (PRC) is beginning its 26 th year at the University of Alabama in Huntsville (UAH). The mission of the Propulsion Research Center is to provide an environment that connects the academic research community with the needs and concerns of the propulsion community while promoting an interdisciplinary approach to solving propulsion problems. This paper describes highlights from the research and academic programs associated with the center over the past eighteen months. Academic highlights include the offering of new graduate courses in liquid rocket engineering and solid rocket combustion instability. Research highlights include a new supersonic wind tunnel capability and a new program in nuclear thermal propulsion systems engineering. In the 2016 fiscal year, total research expenditures rose to $1.563 million and four Ph.D., eleven master's students, and numerous undergraduate students obtained degrees in conjunction with the center. The center continues to be a resource for both fundamental and applied research as well as a significant contributor to workforce development in the propulsion and energy field.

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Machine-Learning-based Algorithms for Automated Image Segmentation Techniques of Transmission X-ray Microscopy (TXM)

Torbati-Sarraf

Niverty

Singh

et al. 2021

JOM

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Elemental and Chemical Mapping of High Capacity Intermetallic Li-ion Anodes with Transmission X-ray Microscopy

Cited by 7 publications

References 20 publications

Elucidating Lithium Alloying-Induced Degradation Evolution in High-Capacity Electrodes

Elucidating Lithium Alloying-Induced Degradation Evolution in High-Capacity Electrodes

Propulsion Research and Academic Programs at the University of Alabama in Huntsville - 2018

Machine-Learning-based Algorithms for Automated Image Segmentation Techniques of Transmission X-ray Microscopy (TXM)

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