In Situ Acoustic Diagnostics of Particle-Binder Interactions in Battery Electrodes

Shpigel, Netanel; Sigalov, Sergey; Levi, Mikhael D.; Mathis, Tyler S.; Daikhin, Leonid; Jänes, Alar; Lust, Enn; Gogotsi, Yury; Aurbach, Doron

doi:10.1016/j.joule.2018.02.014

Cited by 33 publications

(31 citation statements)

References 33 publications

(68 reference statements)

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“…Figure a,b shows the raw EQCM‐D data for the sprayed and transferred films, respectively. As shown in Figure S19 (Supporting Information), these experimental values were close to the straight lines for ideal plane surfaces, implying that NMO was stiff in the dilute NaOH solution without applied voltage, that was to say, the hydrodynamic effect was very small . So, the large resistance change shown in Figure indicated the viscoelasticity change was caused by the internal structure of NMO during the electrochemical process.…”

Section: Resultssupporting

confidence: 63%

Vacuum Filtration‐and‐Transfer Technique Helps Electrochemical Quartz Crystal Microbalance to Reveal Accurate Charge Storage in Supercapacitors

et al. 2019

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Electrochemical quartz crystal microbalance (EQCM) can be used to study the charge storage mechanisms of supercapacitors because of its excellent accuracy in mass change, and a homogeneous and ultrathin sample coating is strongly required for accurate measurement. However, it is difficult to obtain such a coating by the frequently used methods. Here a vacuum filtration‐and‐transfer (VFT) technique is reported to achieve this target. To prove the universality of this method, six materials with different dimensions are selected as research objects, and they are prepared into test films on quartz by VFT method and well‐used spray method for EQCM measurements, respectively. The results show that the VFT method can eliminate the influence caused by inhomogeneity of the films, which is beneficial for clearly distinguishing the rigid model from the viscoelastic model. This method helps EQCM to reflect more precise quality change as well as deformation of the material itself. Consequently, it makes EQCM more reliable to describe the energy storage mechanisms of various electrode materials.

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Section: Resultssupporting

confidence: 63%

Vacuum Filtration‐and‐Transfer Technique Helps Electrochemical Quartz Crystal Microbalance to Reveal Accurate Charge Storage in Supercapacitors

et al. 2019

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“…145,[147][148][149]151,169 By analyzing the mechanical properties of the deposited materials, studies have shown that the selection of a binder is crucial, whose viscoelastic behavior can vary based on the electrolyte environment, affecting in turn the accuracy of the EQCM results. [169][170][171] The analysis of EQCM-D signals and its subsequent modeling using complex equations and models allow for collecting textural, structural and mechanical data of the coating. 160 Despite the fact additional mechanical information can be extracted by monitoring the dissipation, EQCM used in gravimetric and dissipation modes has still some limitations.…”

Section: Electrochemical Quartz Crystal Microbalance (Eqcm)mentioning

confidence: 99%

Nanoporous carbon for electrochemical capacitive energy storage

et al. 2020

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“…21,22 Innovative approaches combining EQCM-D with Online Electrochemical Mass Spectrometry (OEMS) have also being reported to grasp insights into the SEI formation mechanism on both model and practical electrodes. 23,24 Last, and of paramount importance has been the use of EQCM-D to understand the binder-particles 25,26 and solvent-binder 25,[27][28][29] interplays within the electrode as well. Altogether, these shows the span covered by EQCM-D to the battery field and exhaustive list can be found in references.…”

Section: Introductionmentioning

confidence: 99%

Making Advanced Electrogravimetry as an Affordable Analytical Tool for Battery Interface Characterization

et al. 2020

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Numerous sophisticated diagnostic techniques have been designed to monitor Electrode-Electrolyte Interfaces that mainly govern the lifetime and reliability of batteries. Among them, is the electrochemical quartz crystal microbalance that offers valuable insights of the interfaces once the required conditions of the deposited film in terms of viscoelastic and hydrodynamic properties are fulfilled. Herein, we propose a friendly protocol that enlists the elaboration of a homogeneous deposit by spray coating followed by QCM measurements at multiharmonic frequencies to ensure the film flatness and rigidity for collecting meaningful data. Moreover, for easiness of the measurements, we report the design of a versatile and airtight EQCM cell setup that can be used either with aqueous or non-aqueous electrolytes. We also present, using a model battery material, LiFePO 4 , how dual frequency and motional resistance monitoring during electrochemical cycling can been used as a wellsuitable indicator for achieving reliable and reproducible electrogravimetric measurements. We demonstrate through this study the essential role of the solvent assisting the lithium ion insertion at the LiFePO 4 interface with a major outcome being the solvent dependent interfacial behavior. Namely in aqueous media, we prove a near surface desolvation of lithium ions from its water solvation shell as compared with organic molecules. This spatial dissimilarity leads to a smoother Li-ion transport across the LFP-H 2 O interface, hence accounting for the difference in rate capability of LFP in the respective electrolytes. Overall, we hope our analytical insights on interface mechanisms will help in a wider acceptance of EQCM-based methods by the battery community.

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In Situ Acoustic Diagnostics of Particle-Binder Interactions in Battery Electrodes

Cited by 33 publications

References 33 publications

Vacuum Filtration‐and‐Transfer Technique Helps Electrochemical Quartz Crystal Microbalance to Reveal Accurate Charge Storage in Supercapacitors

Vacuum Filtration‐and‐Transfer Technique Helps Electrochemical Quartz Crystal Microbalance to Reveal Accurate Charge Storage in Supercapacitors

Nanoporous carbon for electrochemical capacitive energy storage

Making Advanced Electrogravimetry as an Affordable Analytical Tool for Battery Interface Characterization

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