Three-Dimensional Study of Graphite-Composite Electrode Chemo-Mechanical Response using Digital Volume Correlation

Gonzalez, J. F.; Antartis, Dimitrios A.; Martinez, Maria; Dillon, Shen J.; Chasiotis, Ioannis; Lambros, John

doi:10.1007/s11340-018-0384-5

Cited by 13 publications

(9 citation statements)

References 31 publications

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“…The small changes in electrode thickness that occur after the third cycle suggests that graphite particles that dilate during Li intercalation fill electrode pores: as particles swell to fill the empty voids there is a hysteresis in the thickness changes recorded, as the changes occur undetected by the dilatometer. 34 It is only when the particles displace vertically away from the electrode, that height changes (Δh) are detected. Fig.…”

Section: Resultsmentioning

confidence: 99%

A Dilatometric Study of Graphite Electrodes during Cycling with X-Ray Computed Tomography

Michael¹,

Brett²,

Shearing³

2020

Meet. Abstr.

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Graphite is the most commonly used anode material in commercial lithium-ion batteries (LiBs). Understanding the mechanisms driving the dimensional changes of graphite can pave the way to methods for inhibiting degradation pathways and possibly predict electrochemical performance loss. In this study, correlative microscopy tools were used alongside electrochemical dilatometry (ECD) to provide new insights into the dimensional changes during galvanostatic cycling. X-ray computed tomography (CT) provided a morphological perspective of the cycled electrode so that the effects of dilation and contraction on effective diffusivity and electrode pore phase volume fraction could be examined. During the first cycle, the graphite electrode underwent thickness changes close to 9% after lithiation and, moreover, it did not return to its initial thickness after subsequent delithiation. The irreversible dilation increased over subsequent cycles. It is suggested the primary reason for this dilation is electrode delamination. This is supported by the finding that the electrode porosity remained mostly unchanged during cycling, as revealed by X-ray CT.

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Section: Resultsmentioning

confidence: 99%

A Dilatometric Study of Graphite Electrodes during Cycling with X-Ray Computed Tomography

Michael¹,

Brett²,

Shearing³

2020

Meet. Abstr.

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“…By establishing the DIC before and after deformation, the 3D displacement field was comprehensively and quantitatively measured and the surface strain was determined from the gradient of surface displacement. [ 23 ] The deformation information of the DIC technology is reflected by the speckle on the surface of the measured object. The speckle on the surface of the measured object moves accordingly with the deformation of the object, [ 24,25 ] and the speckle field image information before and after the deformation of the object is collected by the camera.…”

Section: Characterizationmentioning

confidence: 99%

Improvement of the interfacial properties of CF/PEEK composites by introducing aminated polyphenylene sulphide (PPS‐NH₂) as a sizing agent

Ren

Zhu

Zhang³

2022

Polymer Composites

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The resin matrix and CF fibers itself of CF/PEEK composites exhibit surface inertness, resulting in poor interface bonding between CF and PEEK matrix. This phenomenon seriously affects the mechanical properties of CF/PEEK composites especially the interlaminar shear strength (ILSS). In order to improve the interfacial properties of CF/PEEK composites, a novel sizing agent of CF fibers namely PPS‐NH2 was synthesized, and its influence on the fibers–matrix interface interaction and properties of CF/PEEK composites was investigated by using scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, atomic force microscopy. The results showed that the interface of CF/PEEK composite was improved by coating PPS‐NH2 sizing agent on the surface of CF. When the amination degree of PPS‐NH2 reaches 31.25%, the ILSS, flexural strength and modulus of CF/PEEK Composites reach 73.9 MPa (119%), 671.4 MPa (63%) and 32.8GPa (51%) and, respectively. At the same time, the main failure mechanism of CF/PEEK composites changes from fibers–matrix debonding into interface layer deformation and resin fracture. This method can effectively improve the interface defects between CF/PEEK composites.

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“…DVC has proved a powerful tool for analyzing heterogeneous materials such as wood, metal alloys, and composites laminates. [22][23][24][25][26][27][28][29] However, the DVC technique has been sparsely utilized to investigate the mechanical properties in additive manufacturing. 4 This study aims to address the current gaps present in the literature on the analysis and application of m-CT and DVC for FFF produced composite materials.…”

Section: Introductionmentioning

confidence: 99%

“…DVC has proved a powerful tool for analyzing heterogeneous materials such as wood, metal alloys, and composites laminates. 22 – 29 However, the DVC technique has been sparsely utilized to investigate the mechanical properties in additive manufacturing. 4 …”

Section: Introductionmentioning

confidence: 99%

Digital volume correlation analysis of polylactic acid based fused filament fabrication printed composites

Timpano¹,

Melenka²

2021

Journal of Composite Materials

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Fused filament fabrication (FFF) has rapidly begun to see implementation in industrial fields as a method of rapid manufacturing. Traditional FFF parts are made from a single thermoplastic polymer. The polymer is heated to its melting point and deposited on a work bed where a model is gradually built from the base up. While traditional FFF parts have low mechanical properties, a reinforcing phase allows for improved mechanical properties. The addition of a reinforcing material to the base polymer and complex internal microstructure of the 3 D printed party leads to anisotropic mechanical properties. Thus, these materials’ mechanical properties become challenging to characterize using traditional measurement techniques due to the previously mentioned factors. Therefore, it is essential to develop a method in which mechanical properties can be measured and analyzed. This study aims to characterize the mechanical behaviour under a uniaxial tensile load of an FFF produced polylactic acid (PLA)-copper particulate composite. The internal response of the FFF sample was imaged using micro-computed tomography at predetermined loads. The μ-CT images were input into an open-source digital volume correlation (DVC) software to measure the internal displacements and strain tensor fields. The study results show the development of different strain fields and interior features of the FFF parts.

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Three-Dimensional Study of Graphite-Composite Electrode Chemo-Mechanical Response using Digital Volume Correlation

Cited by 13 publications

References 31 publications

A Dilatometric Study of Graphite Electrodes during Cycling with X-Ray Computed Tomography

A Dilatometric Study of Graphite Electrodes during Cycling with X-Ray Computed Tomography

Improvement of the interfacial properties of CF/PEEK composites by introducing aminated polyphenylene sulphide (PPS‐NH₂) as a sizing agent

Digital volume correlation analysis of polylactic acid based fused filament fabrication printed composites

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Three-Dimensional Study of Graphite-Composite Electrode Chemo-Mechanical Response using Digital Volume Correlation

Cited by 13 publications

References 31 publications

A Dilatometric Study of Graphite Electrodes during Cycling with X-Ray Computed Tomography

A Dilatometric Study of Graphite Electrodes during Cycling with X-Ray Computed Tomography

Improvement of the interfacial properties of CF/PEEK composites by introducing aminated polyphenylene sulphide (PPS‐NH2) as a sizing agent

Digital volume correlation analysis of polylactic acid based fused filament fabrication printed composites

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Product

Resources

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Improvement of the interfacial properties of CF/PEEK composites by introducing aminated polyphenylene sulphide (PPS‐NH₂) as a sizing agent