Experimental investigation of the influence of electrolyte loss and replenishment on the critical performances of cylindrical lithium-ion cells

Lai, Xin; Li, Yunfei; Fang, Ruqing; Peng, Dong Liang; Zheng, Yuejiu; Li, Zhe

doi:10.1016/j.est.2022.104951

Cited by 16 publications

(3 citation statements)

References 34 publications

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“…Specifically, our modeling indicates that when saturation falls below the 40%-50% threshold, there's a marked downturn in the cell's performance and lifespan. The undershoot and sudden death highlighted in previous studies, 6,15,16,18,64,65 as well as the exponential decline in performance with electrolyte volume, are consistent with the observations in Fig. 4, and suggest that a threshold saturation level may play a pivotal role in ensuring optimal functioning of LIB cells.…”

Section: Resultssupporting

confidence: 89%

“…The study reported anomalous voltage undershooting at high discharge rates of 3C. Xin Lai et al 64 artificially punctured fresh cylindrical 18,650 cells, allowing them to control the amount of electrolyte, and measured their performance. They found that, based on a 100% electrolyte level in the new cells, a level below 70% would result in a significant capacity reduction, and a level below 40% would result in cell death.…”

Section: Resultsmentioning

confidence: 99%

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Understanding the Knee Point of Aged Lithium-Ion Batteries: A Physics-Based Modeling of Electrolyte Dry-Out and Gas Bubble Entrapment

Ryu,

Kim,

Lee

2023

J. Electrochem. Soc.

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This research addresses the performance and degradation characteristics of lithium-ion batteries (LIBs), focusing on the implications of electrolyte depletion and gas bubble entrapment within the cell. Using a comprehensive electrochemical-thermal model, this study provides simulation results of electrolyte depletion and gas bubble entrapment and their influence on the lifespan of lithium-ion batteries (LIBs). Th study notably explores the battery life beyond the critical “knee-point” - a transition point marking the shift from linear to accelerated capacity decline. An intricate exploration of the relationship between electrolyte saturation levels and various battery parameters, including performance, thermal behavior, and transport properties, is carried out through a detailed mathematical model. The findings highlight the critical impact of electrolyte levels on LIB performance and thermal behavior. It also shows that electrolyte depletion can facilitate lithium plating. Providing insights into electrolyte depletion and gas production processes paves the way for strategies to enhance battery life, safety, and performance, ultimately fostering a deeper understanding of LIB degradation mechanisms.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Understanding the Knee Point of Aged Lithium-Ion Batteries: A Physics-Based Modeling of Electrolyte Dry-Out and Gas Bubble Entrapment

Ryu,

Kim,

Lee

2023

J. Electrochem. Soc.

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“…[ 21 ] It is currently understood that when the film expands and shrinks, the SEI breaks, and the new electrode surface is exposed to the electrolyte, resulting in the continuous accumulation of new SEI. This phenomenon leads to the loss of electrolytes (called “drying” [ 22 ] ) and the increase of electrode impedance, [ 23 ] which reduces efficiency and capacity attenuation. A high irreversible capacity loss in the first few cycles and a rapid capacity decay in the subsequent cycles manifest this.…”

Section: Introductionmentioning

confidence: 99%

Structural Control and Optimization Schemes of Silicon‐Based Anode Materials

Zhu

Zeng

et al. 2023

Energy Tech

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Rechargeable lithium‐ion batteries (LIBs) are today's best performing and most promising energy storage devices. Silicon‐based anode materials with ultrahigh specific capacity are expected to help LIBs play a more significant role in practical applications. However, the irreversible volume expansion of silicon during charge and discharge, which makes the material devastatingly shattered, and the unstable solid electrolyte intermediate film have greatly affected the LIB cycle stability and slowed the commercialization of silicon‐based anode LIBs. In recent years, various approaches have been tried to reduce the adverse effects of bulk effects, and nanosizing is a widely recognized and practical approach. Still, it has also reached a bottleneck in development. This work provides a comprehensive review of the recent progress in improving the electrochemical performance of silicon‐based anode LIBs. The development of mainstream silicon‐based compounds is described, the role of various structural control means for the improvement of silicon‐based anodes is elaborated, as well as other optimization schemes, and a view on the future development of silicon‐based anodes is presented.

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Analyzing the Effect of Electrolyte Quantity on the Aging of Lithium‐Ion Batteries

Lechtenfeld,

Buchmann,

Hagemeister

et al. 2024

Advanced Science

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Despite a substantial impact on various economic and cell technology factors, the influence of electrolyte quantities is rarely addressed in research. This study examines the impact of varying electrolyte quantities on cell performance and aging processes using three different electrolytes: LP57 (1 M LiPF6 in ethylene carbonate:ethyl methyl carbonate (EC:EMC 3:7 w/w), LP572 (LP57+2 wt.% vinylene carbonate (VC)) and LP57 + absVC (18.351 mg VC). Comprehensive analytical post mortem investigations revealed that continuous excessive electrolyte decomposition determines the performance of cells using LP57, leading to enhanced irreversible lithium‐ion loss and interphase thickening with increasing electrolyte volume. Impedance rise due to the growth of the interphase was also identified as the cause of degrading cell performance with rising amounts of LP572, attributed to an increasingly pronounced consumption of VC rather than electrolyte aging effects. By varying the electrolyte quantity while maintaining a constant amount VC within the cell system, the differences in cell performance were minimized, and observed deteriorating effects were suppressed. This study demonstrates the sensitive interdependence of electrolyte volume and additive concentration, practically affecting aging behavior. Comprehensively understanding the characteristics of each individual electrolyte component and tailoring the electrolytes to cell‐specific cell properties proves to be crucial to optimize cell performance.

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Experimental investigation of the influence of electrolyte loss and replenishment on the critical performances of cylindrical lithium-ion cells

Cited by 16 publications

References 34 publications

Understanding the Knee Point of Aged Lithium-Ion Batteries: A Physics-Based Modeling of Electrolyte Dry-Out and Gas Bubble Entrapment

Understanding the Knee Point of Aged Lithium-Ion Batteries: A Physics-Based Modeling of Electrolyte Dry-Out and Gas Bubble Entrapment

Structural Control and Optimization Schemes of Silicon‐Based Anode Materials

Analyzing the Effect of Electrolyte Quantity on the Aging of Lithium‐Ion Batteries

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