Predicting specific heat capacity and directional thermal conductivities of cylindrical lithium-ion batteries: A combined experimental and simulation framework

Al‐Zareer, Maan; Michalak, Andrew; Silva, Carlos Da; Amón, Cristina H.

doi:10.1016/j.applthermaleng.2020.116075

Cited by 35 publications

(6 citation statements)

References 27 publications

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“…The temperature of surrounding surfaces, like cold windows, contributes to our comfort. Clothing insulation and metabolic rate impact how our bodies produce and retain heat 23 . Personal preferences and cultural background play a role, as some individuals may prefer different temperature ranges.…”

Section: Resultsmentioning

confidence: 99%

“…Conducting a thorough analysis of the changes in the thermal transmittance of the timberframed outer walls is necessary for efficient design and optimization. [23][24][25] The data obtained should be used in the engineering calculations of the structural strength of timber framed outer walls, to ensure safety, considering changes in the heat transfer coefficient, depending on changes in the concentration of moisture in the material and the heterogeneity of the wood itself, which was used during the construction works.…”

Section: Codementioning

confidence: 99%

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Comparison of experimental and calculated thermal transmittance for timber‐framed outer wall constructions

Gendelis

2023

Heat Trans

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The importance of accurately determining the thermal transmittance factor for the outer walls of timber‐framed buildings is the driving force behind this research. This calculation is necessary for heating and cooling load determination, as well as energy consumption assessment. This research aims to conduct an analytical comparison, through both experimental and calculated means, of thermal conductivity coefficients of materials employed in the construction of buildings and structures. The methodological approach adopted in this research is grounded on an experimental analysis of the thermal transmittance of the outer wall materials in timber‐framed buildings. Thermal conductivity measurements with a Hot Plate apparatus by ISO 8302 and thermal conductivity calculations using mathematical software were the primary experimental methods deployed during the research. The results of this study demonstrate differences between experimental and calculated thermal transmittance values for timber‐framed outer walls. Moisture inconsistent distribution throughout the material is the reason behind these discrepancies, calling for particular humidity corrections in the calculations, varying across different materials. While working with simplified calculations of timber‐framed outer wall structures, monitoring the uneven heat flow in I‐beam joints is paramount and should be coupled with humidity‐related material changes. This study's practical implications are that the results can be implemented when calculating the energy consumption of building structures and the heating‐cooling load they entail.

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Section: Resultsmentioning

confidence: 99%

Section: Codementioning

confidence: 99%

Comparison of experimental and calculated thermal transmittance for timber‐framed outer wall constructions

Gendelis

2023

Heat Trans

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“…Nanostructured anode materials must be capable of withstanding a broad range of operating temperatures without suffering thermal-induced structural damage. 36,45 Hence, we conducted AIMD simulations to investigate the thermal stability of TiS 2 / MoS 2 heterostructures at 300 and 500 K. Figure 3(a) shows the variation in kinetic energy of the heterostructures as a function of time (fs), along with the final (t = 3000 fs) TiS 2 / MoS 2 heterostructures at the end of the simulation for 300 and 500 K. During the 3000 fs, the kinetic energies exhibited minimal fluctuations, demonstrating that the heterostructures are thermodynamically stable at 300 and 500 K. Furthermore, the overall structural integrity of the heterostructure is preserved in both cases (300 and 500 K), with negligible deviations in the mean lattice positions of individual atoms, without any bond breaking, further confirming the thermal stability of the heterostructures. Figure 3(b) depicts the corresponding stress−strain curves for both the heterostructure and the associated monolayers, while the inset of Figure 3(b) shows a schematic representation of the external biaxial tensile strain applied to the TiS 2 /MoS 2 heterostructure.…”

Section: ■ Computational Detailsmentioning

confidence: 99%

Enhanced Alkali-Ion Adsorption in Strongly Bonded Two-Dimensional TiS₂/MoS₂ van der Waals Heterostructures

2023

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Despite their remarkable properties, many twodimensional (2D) materials do not possess the desired characteristics to enhance the energy density, rate performance, and cycle life of batteries when used as standalone materials for battery electrodes. However, engineering 2D van der Waals (vdW) heterostructures by stacking different 2D materials offers new opportunities for battery electrodes, combining desirable features and overcoming the limitations of the constituent 2D layers. In this work, using firstprinciples calculations, we investigated the electronic structure, thermal stability, stress−strain response, alkali (Li/Na/K)-ion adsorption, and diffusion characteristics of 2D heterostructures of titanium disulfide (TiS 2 ) and molybdenum disulfide (MoS 2 ) monolayers with attractive applications in alkali-metal ion batteries (AMIBs). This work revealed relatively strong interlayer interactions in the heterostructure, resulting in significant enhancements in the adsorption of alkali ions compared to the respective monolayers. This work demonstrates that TiS 2 /MoS 2 heterostructures offer excellent mechanical flexibility, increased strength, and greater strain endurance. The results indicate that TiS 2 /MoS 2 heterostructures are promising materials for next-generation flexible anodes for AMIBs.

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“…As shown in Table 1, the effective radial thermal conductivity found in literature varies between 0.15 and 2.59 Wm −1 •K −1 . Using the data found in the references [8,[10][11][12][13], for the radial thermal conductivity for 18650 cells, a standard deviation of 1.61 Wm −1 •K −1 can be calculated, which can be considered very high, especially compared to the actual measured values. Therefore, this paper's objective is to analyze the experimental process and to identify reasons why these deviations in the radial thermal conductivity occur when the pipe method is used.…”

Section: Introductionmentioning

confidence: 99%

Radial Thermal Conductivity Measurements of Cylindrical Lithium-Ion Batteries—An Uncertainty Study of the Pipe Method

et al. 2022

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A typical method for measuring the radial thermal conductivity of cylindrical objects is the pipe method. This method introduces a heating wire in combination with standard thermocouples and optical Fiber Bragg grating temperature sensors into the core of a cell. This experimental method can lead to high uncertainties due to the slightly varying setup for each measurement and the non-homogenous structure of the cell. Due to the lack of equipment on the market, researchers have to resort to such experimental methods. To verify the measurement uncertainties and to show the possible range of results, an additional method is introduced. In this second method the cell is disassembled, and the thermal conductivity of each cell component is calculated based on measurements with the laser flash method and differential scanning calorimetry. Those results are used to numerically calculate thermal conductivity and to parameterize a finite element model. With this model, the uncertainties and problems inherent in the pipe method for cylindrical cells were shown. The surprising result was that uncertainties of up to 25% arise, just from incorrect assumption about the sensor position. Furthermore, the change in radial thermal conductivity at different states of charge (SOC) was measured with fully functional cells using the pipe method.

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Predicting specific heat capacity and directional thermal conductivities of cylindrical lithium-ion batteries: A combined experimental and simulation framework

Cited by 35 publications

References 27 publications

Comparison of experimental and calculated thermal transmittance for timber‐framed outer wall constructions

Comparison of experimental and calculated thermal transmittance for timber‐framed outer wall constructions

Enhanced Alkali-Ion Adsorption in Strongly Bonded Two-Dimensional TiS₂/MoS₂ van der Waals Heterostructures

Radial Thermal Conductivity Measurements of Cylindrical Lithium-Ion Batteries—An Uncertainty Study of the Pipe Method

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Predicting specific heat capacity and directional thermal conductivities of cylindrical lithium-ion batteries: A combined experimental and simulation framework

Cited by 35 publications

References 27 publications

Comparison of experimental and calculated thermal transmittance for timber‐framed outer wall constructions

Comparison of experimental and calculated thermal transmittance for timber‐framed outer wall constructions

Enhanced Alkali-Ion Adsorption in Strongly Bonded Two-Dimensional TiS2/MoS2 van der Waals Heterostructures

Radial Thermal Conductivity Measurements of Cylindrical Lithium-Ion Batteries—An Uncertainty Study of the Pipe Method

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Enhanced Alkali-Ion Adsorption in Strongly Bonded Two-Dimensional TiS₂/MoS₂ van der Waals Heterostructures