In Situ Radiographic Investigation of (De)Lithiation Mechanisms in a Tin‐Electrode Lithium‐Ion Battery

Sun, Fu; Markötter, Henning; Zhou, Dong; Alrwashdeh, Saad S.; Hilger, André; Kardjilov, Nikolay; Manke, Ingo; Banhart, John

doi:10.1002/cssc.201600220

Cited by 28 publications

(29 citation statements)

References 29 publications

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“…Note that this extended expansion period was previously discovered when monitoring volumetric changes in Si thin film . A similar phenomenon, albeit with an early termination of the particle's volume expansion, was reported for Si 0.64 Sn 0.36 alloy and Sn electrodes . Despite these previous reports, the asynchronization of particles’ volume change with the (dis)charging state of the electrode has been rarely investigated to date, especially quantitatively.…”

Section: Resultsmentioning

confidence: 99%

“…[26] As imilar phenomenon, albeit with an early termination of the particle'sv olumee xpansion, was reportedf or Si 0.64 Sn 0.36 alloy [27] and Sn electrodes. [28] Despite these previous reports, the asynchronization of particles' volume change with the (dis)charging state of the electrode has been rarely investigated to date, especially quantitatively.I nF igure 4a and 4b,t he diameter developmento fp article P1 (Figure 2c)a nd diameter/ volumev ariation of another two particles (denoteda sP2 and P3;s ee Figure 4a and FigureS3) during lithiation and delithiation are shown for comparison. From the beginningo fl ithiation until ac apacity of 1000 mAh g À1 ,aperiod with almost unchanged diameter and less than 10 %e xpansion is observedi n all three particles.…”

Section: Resultsmentioning

confidence: 99%

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In situ and Operando Tracking of Microstructure and Volume Evolution of Silicon Electrodes by using Synchrotron X‐ray Imaging

et al. 2018

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The internal microstructure of a silicon electrode in a lithium ion battery was visualized by operando synchrotron X‐ray radioscopy during battery cycling. The silicon particles were found to change their sizes upon lithiation and delithiation and the changes could be quantified. It was found that volume change of a particle is related to its initial size and is also largely determined by the changing surrounding electron‐conductive network and internal interface chemical environment (e.g., electrolyte migration, solid–electrolyte interphase propagation) within fractured particles. Moreover, an expansion prolongation phenomenon was discovered whereby some particles continue expanding even after switching the battery current direction and shrinkage would be expected, which is explained by assuming different expansion characteristics of particle cores and outer regions. The study provides new basic insights into processes inside Si particles during lithiation and delithiation and also demonstrates the unique possibilities of operando synchrotron X‐ray imaging for studying degradation mechanisms in battery materials.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

In situ and Operando Tracking of Microstructure and Volume Evolution of Silicon Electrodes by using Synchrotron X‐ray Imaging

et al. 2018

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“…[46][47][48] An electrochemical validation of the presently designed cell can be found in our previous reports. [49][50] SEM images of the surface and a cross-section of the employed trilayer Celgard ® 2325 separator are shown in Figure 2.…”

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confidence: 86%

Study of the Mechanisms of Internal Short Circuit in a Li/Li Cell by Synchrotron X-ray Phase Contrast Tomography

et al. 2016

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Knowledge about degradation and failure of Li-ion batteries (LIBs) is of paramount importance especially because failure can be accompanied by severe hazards. To contribute to the understanding of such phenomena synchrotron in-line phase contrast Xray tomography was employed to investigate internal cell deformation and degradation caused by an internal short circuit (ISC). The tomographic images taken from an uncycled Li/Li cell and a short-circuited Li/Li cell reveal how lithium microstructures (LmS) develop during electrochemical stripping and plating during discharge and charge and how the three-layer separator used is damaged by growing LmSs and delaminates and melts as a consequence of an ISC. Previously unknown insights into the internal cell degradation and deformation mechanisms caused by an ISC are obtained and provide hints of how the properties of the separator could be modified in order to improve the reliability and safety of current and next-generation LIBs.

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“…[22,75,76] However, the (de) alloying process of Sn in SIBs has not been fully elucidated and demonstrated to be more complicated than that for LIBs. [22,75,76] However, the (de) alloying process of Sn in SIBs has not been fully elucidated and demonstrated to be more complicated than that for LIBs.…”

Section: Metallic Tinmentioning

confidence: 99%

Alloy‐Based Anode Materials toward Advanced Sodium‐Ion Batteries

et al. 2017

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Sodium-ion batteries (SIBs) are considered as promising alternatives to lithium-ion batteries owing to the abundant sodium resources. However, the limited energy density, moderate cycling life, and immature manufacture technology of SIBs are the major challenges hindering their practical application. Recently, numerous efforts are devoted to developing novel electrode materials with high specific capacities and long durability. In comparison with carbonaceous materials (e.g., hard carbon), partial Group IVA and VA elements, such as Sn, Sb, and P, possess high theoretical specific capacities for sodium storage based on the alloying reaction mechanism, demonstrating great potential for high-energy SIBs. In this review, the recent research progress of alloy-type anodes and their compounds for sodium storage is summarized. Specific efforts to enhance the electrochemical performance of the alloy-based anode materials are discussed, and the challenges and perspectives regarding these anode materials are proposed.

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In Situ Radiographic Investigation of (De)Lithiation Mechanisms in a Tin‐Electrode Lithium‐Ion Battery

Cited by 28 publications

References 29 publications

In situ and Operando Tracking of Microstructure and Volume Evolution of Silicon Electrodes by using Synchrotron X‐ray Imaging

In situ and Operando Tracking of Microstructure and Volume Evolution of Silicon Electrodes by using Synchrotron X‐ray Imaging

Study of the Mechanisms of Internal Short Circuit in a Li/Li Cell by Synchrotron X-ray Phase Contrast Tomography

Alloy‐Based Anode Materials toward Advanced Sodium‐Ion Batteries

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