Influence of surface characteristics on the penetration rate of electrolytes into model cells for lithium ion batteries

Beyer, Sebastian; Kobsch, Oliver; Pospiech, Doris; Simon, Frank; Peter, Christian; Nikolowski, Kristian; Wolter, Mareike; Voit, Brigitte

doi:10.1080/01694243.2019.1686831

Cited by 13 publications

(12 citation statements)

References 25 publications

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“…[155] Similarly, the choice of separator material and its coating has a major impact on the wetting properties of the entire cell stack. [156] While the conventionally used poly elipse separators made of PE and PP wetted poorly with the hydrocarbon solvents, creating a bottleneck in the joint wetting, [157] coatings with ceramic particles or with PVDF improve the surface energy so that the material-specific wetting properties of the separators are comparable to those of the electrodes. [158,159] Furthermore, additional process steps during cell production, such as lamination of electrodes and separators [160] or laser structuring of the electrodes [150] improve the wetting properties of the cell materials and thus lead to faster wetting of the entire cell.…”

Section: Cm-mm Offlinementioning

confidence: 99%

Data Specifications for Battery Manufacturing Digitalization: Current Status, Challenges, and Opportunities

Zanotto

Dominguez

Ayerbe

et al. 2022

Batteries & Supercaps

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Batteries & Supercaps www.batteries-supercaps.org Review doi.org/10.1002/batt.202200224 Lithium-ion battery (LIB) manufacturing requires a pilot stage that optimizes its characteristics. However, this process is costly and time-consuming. One way to overcome this is to use a set of computational models that act as a digital twin of the pilot line, exchanging information in real-time that can be compared with measurements to correct parameters. Here we discuss the parameters involved in each step of LIB manufacturing, show available computational modeling approaches, and discuss details about practical implementation in terms of software. Then, we analyze these parameters regarding their criticality for modeling set-up and validation, measurement accuracy, and rapidity. Presenting this in an understandable format allows identifying missing aspects, remaining challenges, and opportunities for the emergence of pilot lines integrating digital twins. Finally, we present the challenges of managing the data produced by these models. As a snapshot of the state-of-theart, this work is an initial step towards digitalizing battery manufacturing pilot lines, paving the way toward autonomous optimization.

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Section: Cm-mm Offlinementioning

confidence: 99%

Data Specifications for Battery Manufacturing Digitalization: Current Status, Challenges, and Opportunities

Zanotto

Dominguez

Ayerbe

et al. 2022

Batteries & Supercaps

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show abstract

“…The superior electrolyte wettability could reduce ionic resistance and further increase the rate capacity of LIBs. [114] In the experiment process, the electrolyte wettability is calculated by measuring the weight of separator before and after immersing into liquid electrolyte by using Equation ( 7)…”

Section: Wettability Issuementioning

confidence: 99%

“…The superior electrolyte wettability could reduce ionic resistance and further increase the rate capacity of LIBs. [ 114 ]…”

Section: Architectures For Composite Separator Designmentioning

confidence: 99%

Composite Separators for Robust High Rate Lithium Ion Batteries

Yuan

Wen

Chen

et al. 2021

Adv Funct Materials

132

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Lithium ion batteries (LIBs) are one of the most potential energy storage devices among various rechargeable batteries due to their high energy/power density, long cycle life, and low self‐discharge properties. However, current LIBs fail to meet the ever‐increasing safety and fast charge/discharge demands. As one of the main components in LIBs, separator is of paramount importance for safety and rate performance of LIBs. Among the various separators, composite separators have been widely investigated for improving their thermal stability, mechanical strength, electrolyte uptake, and ionic conductivity. Herein, the challenges and limitations of commercial separators for LIBs are reviewed, and a systematic overview of the state‐of‐the‐art research progress in composite separators is provided for safe and high rate LIBs. Various combination types of composite separators including blending, layer, core–shell, and grafting types are covered. In addition, models and simulations based on the various types of composite separators are discussed to comprehend the composite mechanism for robust performances. At the end, future directions and perspectives for further advances in composite separators are presented to boost safety and rate capacity of LIBs.

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“…[27] Moreover, the good wettability enables the separator to not only store sufficient electrolyte, prolong the service life of the battery, but also transmit ions smoothly, reduce ion resistance and impedance. [46] Equations ( 2) and ( 3) are used to calculate the electrolyte absorption rate and retention rate of the separator, where W dry and W wet represent the mass of the dry separator and the separator after soaking in the electrolyte for a period of time.…”

Section: Electrolyte Wettabilitymentioning

confidence: 99%

Poly(vinylidene fluoride) separators for next‐generation lithium based batteries

et al. 2021

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Lithium-ion batteries (LIBs) have become star products in wireless electronic equipment, new energy vehicles and many other fields due to their advantages of high energy density, light weight, good stability, high charging-discharging efficiency, long service life and environmental friendliness. The separator is an indispensable part of batteries that does not participate in electrochemical reactions, separating the anode and cathode. It has a microporous structure, which can store electrolyte and allow ions to transfer freely. Poly(vinylidene fluoride) (PVDF)-based separators are characterized by strong polarity, high dielectric constant, stable electrochemical performance, excellent tensile properties and mechanical strength, favorable thermal stability and wettability. Therefore, they are proposed to be potential candidates for novel separators in the field of LIBs. This review introduces the recent researches and advances in PVDF-based separators for LIBs, with the characterizations and requirements for separators. It is mainly divided into the two types including monolayer and multilayer separators. Furthermore, the performance of the PVDF-based separators is summarized, and the challenges and prospects in their practical application are briefly analyzed.

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Influence of surface characteristics on the penetration rate of electrolytes into model cells for lithium ion batteries

Cited by 13 publications

References 25 publications

Data Specifications for Battery Manufacturing Digitalization: Current Status, Challenges, and Opportunities

Data Specifications for Battery Manufacturing Digitalization: Current Status, Challenges, and Opportunities

Composite Separators for Robust High Rate Lithium Ion Batteries

Poly(vinylidene fluoride) separators for next‐generation lithium based batteries

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