Lithium distribution and transfer in high-power 18650-type Li-ion cells at multiple length scales

Petz, Dominik; Mühlbauer, Martin; Baran, Volodymyr; Schökel, Alexander; Kochetov, Vladislav; Hofmann, M.; Dyadkin, Vadim; Staron, Peter; Vaughan, Gavin; Lienert, U.; Müller‐Buschbaum, Peter; Senyshyn, Anatoliy

doi:10.1016/j.ensm.2021.06.028

Cited by 21 publications

(20 citation statements)

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“…The occurrence of a inhomogeneous lithium distribution have been reported [32,48,50] and explained [18,43] . As described in the methodology part, the experiment was designed to minimize the effect of the anodic overhang.…”

Section: Discussionmentioning

confidence: 99%

Path‐Dependent Ageing of Lithium‐ion Batteries and Implications on the Ageing Assessment of Accelerated Ageing Tests

Rogge,

Jossen

2023

Batteries & Supercaps

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Path dependency in ageing of Lithium‐Ion batteries still needs to be fully understood, and gaps remain. For realistic operational scenarios that involve dynamic load profiles, understanding this path dependency is essential for effective monitoring and accurate modelling of LIBs‐ageing. Our research investigates the impact of different ageing sequences on capacity reduction and resistance increase, key metrics for determining the state of health (SOH). Moreover, we argue that relying solely on SOH‐based monitoring is insufficient for predicting the ongoing ageing trajectory. Our findings underscore that recent operational history influences subsequent degradation. This degradation is attributed to the emergence of uneven lithium distribution, which can both induce capacity recovery and amplify degradation during cycling phases. Such insights are particularly interesting for ageing studies where accelerated battery degradation is achieved through continuous cycling, a common approach in most cyclic ageing investigations. We demonstrate that capacity difference analysis (CDA) holds promise in tracking this unevenness and the potential for capacity restoration through re‐homogenisation. In conclusion, our work highlights the importance of utilising advanced tools, such as CDA and degradation mode (DM) analysis, to ensure accurate conclusions are drawn in accelerated LIB‐ageing experiments.

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Section: Discussionmentioning

confidence: 99%

Path‐Dependent Ageing of Lithium‐ion Batteries and Implications on the Ageing Assessment of Accelerated Ageing Tests

Rogge,

Jossen

2023

Batteries & Supercaps

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“…XRD-CT has proved a useful tool in providing evidence of chemical heterogeneities and crystallographic changes, often cycling-induced, in NCA [85], NMC [82,86], LMO [87], LFP [88][89][90], graphite [91,92], Na-based [93] and Li-S [94] batteries. Some studies provide evidence of strain introduced during cycling that could impact the overall mechanical integrity and lifetime of the battery.…”

Section: Xrd-ctmentioning

confidence: 99%

Recent developments in X-ray diffraction/scattering computed tomography for materials science

Omori,

Bobitan,

Vamvakeros

et al. 2023

Phil. Trans. R. Soc. A.

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X-ray diffraction/scattering computed tomography (XDS-CT) methods are a non-destructive class of chemical imaging techniques that have the capacity to provide reconstructions of sample cross-sections with spatially resolved chemical information. While X-ray diffraction CT (XRD-CT) is the most well-established method, recent advances in instrumentation and data reconstruction have seen greater use of related techniques like small angle X-ray scattering CT and pair distribution function CT. Additionally, the adoption of machine learning techniques for tomographic reconstruction and data analysis are fundamentally disrupting how XDS-CT data is processed. The following narrative review highlights recent developments and applications of XDS-CT with a focus on studies in the last five years. This article is part of the theme issue 'Exploring the length scales, timescales and chemistry of challenging materials (Part 2)'.

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“…62,63 Such a cell configuration is characterized by having hardly accessibile interfaces for which instrumental adaptations will be necessary. The extension of the use of EC-AFM on all-solid-state systems serves to complement the information given by the synchrotron radiation-based techniques [64][65][66][67][68][69][70][71][72][73] the latter being nowadays the most sophisticated approach apt to investigate all solid-state LiBs. Synchrotron-based techniques provide information on local structure, chemical and phase composition in form of map images thanks to the high brilliance of the X-ray radiation (vide infra).…”

Section: Electrochemical Atomic Force Microscopy (Ec-afm) For Libs An...mentioning

confidence: 99%

“…Synchrotron-based techniques provide information on local structure, chemical and phase composition in form of map images thanks to the high brilliance of the X-ray radiation (vide infra). [64][65][66][67][68][69][70][71][72][73] Besides the investigation of the properties already discussed in the previous section, AFM has proven to be a powerful tool to get an insight into the working mechanism of LiBs monitoring, for example, the electrodes consumption and the development of SEI (vide infra). This is possible by means of in situ AFM and EC-AFM, which operate in fluid electrolyte using the scanned surface as electrode.…”

Section: Electrochemical Atomic Force Microscopy (Ec-afm) For Libs An...mentioning

confidence: 99%

“…This procedure is known as phase contrast tomography, and it is particularly suitable for low density materials which show a weak absorption. 120 X-ray characterizations can be also run using synchrotron facilities: [64][65][66][67][68][69][70][71][72][73] synchrotron radiation offers high brilliance, excellent directionality and a high X-ray flux that enhance the contrast when low density materials are studied. Moreover, synchrotron radiation allows to achieve high temporal resolution for systems undergoing changes (vide supra).…”

Section: Use Of Xrm In Libs Researchmentioning

confidence: 99%

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Review—Multiscale Characterization of Li-Ion Batteries through the Combined Use of Atomic Force Microscopy and X-ray Microscopy and Considerations for a Correlative Analysis of the Reviewed Data

Dini

Cognigni

Passeri

et al. 2021

J. Electrochem. Soc.

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The present review analyses the recent literature on the combined use of X-ray microscopy (XRM) and atomic force microscopy (AFM) for multiscale characterization of Li+ (or Li) batteries (LiBs) with the aim of developing guidelines for correlative analysis. The usefulness of XRM resides in the capability of affording non invasively in situ images of the inner parts of a LiB (an encapsulated device) with spatial resolution of dozens of nm during operation. XRM is non destructive and affords the early diagnosis of LiBs degradation causes when these manifest themselves as microdeformations. Multiscale characterization of LiBs also requires AFM for visualizing the morphological/physical alterations of LiB components (anodes, cathodes, electrolyte) at the sub-nanometer level. Different to XRM, AFM necessitates of a modification of LiB working configuration since AFM uses a contacting probe whereas XRM exploits radiation-matter interactions and does not require LiB dissection. A description of the working principles of the two techniques is provided to evidence which technical aspects have to be considered for achieving a meaningful correlative analysis of LiBs. In delineating new perspectives for the analysis of LiBs we will consider additional complementary techniques. Among various AFM-based techniques particular emphasis is given to electrochemical AFM (EC-AFM).

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Lithium distribution and transfer in high-power 18650-type Li-ion cells at multiple length scales

Cited by 21 publications

References 56 publications

Path‐Dependent Ageing of Lithium‐ion Batteries and Implications on the Ageing Assessment of Accelerated Ageing Tests

Path‐Dependent Ageing of Lithium‐ion Batteries and Implications on the Ageing Assessment of Accelerated Ageing Tests

Recent developments in X-ray diffraction/scattering computed tomography for materials science

Review—Multiscale Characterization of Li-Ion Batteries through the Combined Use of Atomic Force Microscopy and X-ray Microscopy and Considerations for a Correlative Analysis of the Reviewed Data

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