Mechanics-based design of lithium-ion batteries: a perspective

Lu, Bo; Yuan, Yanan; Bao, Yinhua; Zhao, Yanfei; Song, Yicheng; Zhang, Junqian

doi:10.1039/d2cp03301a

Cited by 6 publications

(4 citation statements)

References 298 publications

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“…Different aging effects are influenced by external factors such as battery design [26][27][28]. Battery design do not conflict with chemical component studies, and the mechanical analysis is also one of the bridges between the micro scale and the meso/macro scale [29]. These factors interact with each other within a close time frame, and most of them cannot be studied in isolation, making the investigation of aging mechanisms intricate.…”

Section: Effect Of External Factors On Battery Agingmentioning

confidence: 99%

Advances in performance degradation mechanism and safety assessment of LiFePO₄ for energy storage

Xiao,

Chen,

Zhao

et al. 2024

Nanotechnology

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In the context of "energy shortage", developing a novel energy-based power system is essential for advancing the current power system towards low-carbon solutions. As the usage duration of lithium-ion batteries for energy storage increases, the nonlinear changes in their aging process pose challenges to accurately assess their performance. This paper focuses on the study LiFeO4(LFP), used for energy storage, and explores their performance degradation mechanisms. Furthermore, it introduces common battery models and data structures & algorithms, which used for predicting the correlation between electrode materials and physical parameters, applying to SOH assessment and thermal warning. This paper also discusses the establishment of digital management system. Compared to conventional battery networks, dynamically reconfigurable battery networks can realize real-time monitoring of lithium-ion batteries, and reduce the probability of fault occurrence to an acceptably low level.

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Section: Effect Of External Factors On Battery Agingmentioning

confidence: 99%

Advances in performance degradation mechanism and safety assessment of LiFePO₄ for energy storage

Xiao,

Chen,

Zhao

et al. 2024

Nanotechnology

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“…Solid electrolytes in batteries are safer than the more common organic liquid electrolytes, which are subject to concerns such as flammability and overheating. – Poly(ethylene oxide) (PEO), which complexes with lithium salts, is one of the most widely considered materials for polymer electrolytes. – Solid polymers have favorable toughness but suffer from limited ionic conductivity. Accordingly, composite polymer electrolytes (CPEs) incorporate filler particles for enhancing ionic conductivity. – Active fillers with lithium, such as Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) and Li 6.4 La 3 Zr 1.4 O 12 (LLZO), have been among the most widely investigated in recent years. – Despite rapid advances in the development of CPEs, attention regarding the effects of compressive stress has predominantly been from the perspective of porous electrodes, electrode–electrolyte interfaces, or combined effects throughout an entire cell. – Much less is known about the mechanical behavior of composite polymer electrolytes, particularly for long-term cycling. Stress distribution within a composite electrolyte can result in a variety of failure modes, including detachment or delamination between active materials and surrounding polymer electrolytes .…”

Section: Introductionmentioning

confidence: 99%

Softening of PEO–LiTFSI/LLZTO Composite Polymer Electrolytes for Solid-State Batteries under Cyclic Compression

Yoon,

Mulay,

Baltazar

et al. 2023

ACS Appl. Energy Mater.

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Composite polymer electrolytes (CPEs) strike an effective balance between ionic conductivity and mechanical flexibility for lithium-ion solid-state batteries. Long-term performance, however, is limited by capacity fading after hundreds of charge and discharge cycles. The causes of performance degradation include multiple contributing factors such as dendrite formation, physicochemical changes in electrolytes, and structural remodeling of porous electrodes. Among the many factors that contribute to performance degradation, the effect of stress specifically on the composite electrolyte is not well understood. This study examines the mechanical changes in a poly(ethylene oxide) electrolyte with bis(trifluoromethane) sulfonimide. Two different sizes of Li6.4La3Zr1.4Ta0.6O12 particles (500 nm and 5 μm) are compared to evaluate the effect of the surface-to-volume ratio of the ion-conducting fillers within the composite. Cyclic compression was applied to mimic stress cycling in the electrolyte, which would be caused by asymmetric volume changes that occur during charging and discharging cycles. The electrolytes exhibited fatigue softening, whereby the compressive modulus gradually decreased with an increase in the number of cycles. When the electrolyte was tested for 500 cycles at 30% compressive strain, the compressive modulus of the electrolyte was reduced to approximately 80% of the modulus before cycling. While the extent of softening was similar regardless of particle size, CPEs with 500 nm particles exhibited a significant reduction in ionic conductivity after cyclic compression (1.4 × 10–7 ± 2.3 × 10–8 vs 1.1 × 10–7 ± 2.0 × 10–8 S/cm, mean ± standard deviation, n = 4), whereas there was no significant change in ionic conductivity for CPEs with 5 μm particles. These observations performed deliberately in the absence of charge–discharge cycles show that repetitive mechanical stresses can play a significant role in altering the performance of CPEs, thereby revealing another possible mechanism for performance degradation in all-solid-state batteries.

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“…Lithium-ion batteries (LIBs) are currently one of the most important energy storage technologies and are the key component of various electronic devices, electric vehicles, and large-scale energy storage devices. 1,2 As a typical complex system problem, the aging behavior in LIBs still has much to be investigated. 2 Qualitatively, the coupled mechanical-electrochemical degradation behavior has been regarded as one of the key mechanisms of LIB failure.…”

Section: Introductionmentioning

confidence: 99%

“…3 However, investigations in this field are generally inconclusive and muddled, and further clarification is crucial. 1,3 In this paper, the silicon composite electrode, which generally suffers from extremely severe electrode-level mechanical failure due to the large volume expansion of silicon, is selected to demonstrate the connection between electrode-level crack evolution and capacity fading. By processing the scanning electron microscope (SEM) images, features of in-plane cracks in active layers, such as the density, opening area, and width, are first captured.…”

mentioning

confidence: 99%

Revealing the Quantitative Connection between Electrode-level Cracks and Capacity Fading of Silicon Electrodes in Lithium-ion Battery

ZHU,

LU,

RUI

et al. 2023

Electrochemistry

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For the coupling problems of lithium-ion batteries, a key issue at hand is that it is still unclear which mechanical failures can cause degradation and how, which is particularly salient at the electrode level. In this work, the correlation between electrode-level cracks and cycling capacity of silicon electrodes is investigated. Unexpectedly, for cracks in active layers, the capacity decreases with the increase of crack width, while the connection of other crack features to the capacity is weaker or even absent. Meanwhile, the modeling results, however, suggest that the increase in crack width cannot directly cause the capacity fading. To explain these results, the relationship between electrode debonding and active layer crack opening is also described quantitatively. By combining the debonding model and the porous electrode model, the connection between crack widths of active layers and capacity fading is clarified, and accurate predictions are obtained. These results indicate that the easily measurable width of active layer cracks is qualified to evaluate degradation, while the electrode debonding is in fact the direct cause of capacity fading. The findings in this work provide a more precise understanding of the degradation mechanism in lithium-ion battery electrodes.

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Mechanics-based design of lithium-ion batteries: a perspective

Abstract: From the overall framework of battery development, the battery structures have not received enough attention compared to the chemical components in batteries. The mechanical-electrochemical coupling behavior is a starting point...

Cited by 6 publications

References 298 publications

Advances in performance degradation mechanism and safety assessment of LiFePO₄ for energy storage

Advances in performance degradation mechanism and safety assessment of LiFePO₄ for energy storage

Softening of PEO–LiTFSI/LLZTO Composite Polymer Electrolytes for Solid-State Batteries under Cyclic Compression

Revealing the Quantitative Connection between Electrode-level Cracks and Capacity Fading of Silicon Electrodes in Lithium-ion Battery

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Mechanics-based design of lithium-ion batteries: a perspective

Abstract: From the overall framework of battery development, the battery structures have not received enough attention compared to the chemical components in batteries. The mechanical-electrochemical coupling behavior is a starting point...

Cited by 6 publications

References 298 publications

Advances in performance degradation mechanism and safety assessment of LiFePO4 for energy storage

Advances in performance degradation mechanism and safety assessment of LiFePO4 for energy storage

Softening of PEO–LiTFSI/LLZTO Composite Polymer Electrolytes for Solid-State Batteries under Cyclic Compression

Revealing the Quantitative Connection between Electrode-level Cracks and Capacity Fading of Silicon Electrodes in Lithium-ion Battery

Contact Info

Product

Resources

About

Advances in performance degradation mechanism and safety assessment of LiFePO₄ for energy storage

Advances in performance degradation mechanism and safety assessment of LiFePO₄ for energy storage