Buckling analysis and control of layered electrode structure at finite deformation

Zhu, Zuoquan; Hu, Hongjiu; He, Yaolong; Bo, Tang

doi:10.1016/j.compstruct.2018.08.020

Cited by 11 publications

(4 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This actually brings about the issue of correlation between the response at the battery level and that at the electrode level, which may involve multiple phenomena including the anisotropic behavior of the current collectors [143] and the buckling of the electrode. [144,146] Nevertheless, an urgent issue for improving the battery safety is to find out when and how the fracture of the current collector occurs under mechanical abuses of the battery. Yet difficulties of settling this issue are manifest and need to be overcome.…”

Section: Fracture Of Current Collectormentioning

confidence: 99%

Review on electrode-level fracture in lithium-ion batteries*

Ning

Shi

et al. 2020

Chinese Phys. B

View full text Add to dashboard Cite

Fracture occurred in electrodes of the lithium-ion battery compromises the integrity of the electrode structure and would exert bad influence on the cell performance and cell safety. Mechanisms of the electrode-level fracture and how this fracture would affect the electrochemical performance of the battery are of great importance for comprehending and preventing its occurrence. Fracture occurring at the electrode level is complex, since it may involve fractures in or between different components of the electrode. In this review, three typical types of electrode-level fractures are discussed: the fracture of the active layer, the interfacial delamination, and the fracture of metallic foils (including the current collector and the lithium metal electrode). The crack in the active layer can serve as an effective indicator of degradation of the electrochemical performance. Interfacial delamination usually follows the fracture of the active layer and is detrimental to the cell capacity. Fracture of the current collector impacts cell safety directly. Experimental methods and modeling results of these three types of fractures are concluded. Reasonable explanations on how these electrode-level fractures affect the electrochemical performance are sorted out. Challenges and unsettled issues of investigating these fracture problems are brought up. It is noted that the state-of-the-art studies included in this review mainly focus on experimental observations and theoretical modeling of the typical mechanical damages. However, quantitative investigations on the relationship between the electrochemical performance and the electrode-level fracture are insufficient. To further understand fractures in a multi-scale and multi-physical way, advancing development of the cross discipline between mechanics and electrochemistry is badly needed.

show abstract

Section: Fracture Of Current Collectormentioning

confidence: 99%

Review on electrode-level fracture in lithium-ion batteries*

Ning

Shi

et al. 2020

Chinese Phys. B

View full text Add to dashboard Cite

show abstract

“…As for the solid migration of lithium in the active layer, the influence of the electric field will be minimal, and the governing Equation can hence be written as [ 27 ]:

where

and

represent the concentration and diffusion coefficient of Li, respectively.…”

Section: Methodsmentioning

confidence: 99%

Modeling and Simulation in Capacity Degradation and Control of All-Solid-State Lithium Battery Based on Time-Aging Polymer Electrolyte

Fang

Fan

et al. 2021

Polymers

Self Cite

View full text Add to dashboard Cite

The prediction of electrochemical performance is the basis for long-term service of all-solid-state-battery (ASSB) regarding the time-aging of solid polymer electrolytes. To get insight into the influence mechanism of electrolyte aging on cell fading, we have established a continuum model for quantitatively analyzing the capacity evolution of the lithium battery during the time-aging process. The simulations have unveiled the phenomenon of electrolyte-aging-induced capacity degradation. The effects of discharge rate, operating temperature, and lithium-salt concentration in the electrolyte, as well as the electrolyte thickness, have also been explored in detail. The results have shown that capacity loss of ASSB is controlled by the decrease in the contact area of the electrolyte/electrode interface at the initial aging stage and is subsequently dominated by the mobilities of lithium-ion across the aging electrolyte. Moreover, reducing the discharge rate or increasing the operating temperature can weaken this cell deterioration. Besides, the thinner electrolyte film with acceptable lithium salt content benefits the durability of the ASSB. It has also been found that the negative effect of the aging electrolytes can be relieved if the electrolyte conductivity is kept being above a critical value under the storage and using conditions.

show abstract

“…For the former, it is noticed that the drying process constitutes the major bottleneck in high-speed production [8] and is also a sensitive step in quality control as it determines the microstructure of composite electrode coatings, which comprise active particles, polymer binders and conductive additives. For the latter, internal stress induced by electrochemical loadingusually leads to the loss of mechanical integrity, in the form of cracking [9,10], electrodeposition [11,12], delamination [13,14], wrinkling [15,16] and buckling [17][18][19][20] and even fracture [21][22][23]. Clearly, the consequent microstructure of electrodes used in the electrochemical cycling stage depends significantly on the drying process.…”

Section: Introductionmentioning

confidence: 99%

Role of heterogeneous inactive component distribution induced by drying process on the mechanical integrity of composite electrode during electrochemical operation

Zhu¹,

He²,

Hu³

2020

J. Phys. D: Appl. Phys.

Self Cite

View full text Add to dashboard Cite

The drying rate would significantly affect the quality of the composite electrode after solidification. In order to clarify the underlying effect mechanism of ingredient heterogeneity in the electrode caused by the drying process on the mechanical integrity of lithium secondary batteries in service, an integrated analysis approach is developed to determine the mechanical properties and lithium diffusion-induced stress of the composite electrode with gradient distributed binder and conductive agent. A faster solidification is found to broaden the inhomogeneous extent of inactive components in the electrode coating across its thickness, markedly. As a result, it will not only enlarge the tensile stress in the brittle electrode upon electrochemical operation due to the increased effective modulus of composite near the surface, but will also impair the interfacial strength between the active layer and current collector. Moreover, a two-stage drying protocol (initially fast, followed by slow evaporation of solvent) is found to be greatly beneficial to boosting the resistance to cohesion failure and surface damage of the composite electrode, and the optimized processing parameters are proposed to obtain a robust production with high efficiency.

show abstract

Buckling analysis and control of layered electrode structure at finite deformation

Cited by 11 publications

References 44 publications

Review on electrode-level fracture in lithium-ion batteries*

Review on electrode-level fracture in lithium-ion batteries*

Modeling and Simulation in Capacity Degradation and Control of All-Solid-State Lithium Battery Based on Time-Aging Polymer Electrolyte

Role of heterogeneous inactive component distribution induced by drying process on the mechanical integrity of composite electrode during electrochemical operation

Contact Info

Product

Resources

About