Effect of electrode compression on the wettability of lithium-ion batteries

Lee, Sang Gun; Jeon, Dong Hyup

doi:10.1016/j.jpowsour.2014.04.127

Cited by 79 publications

(49 citation statements)

References 15 publications

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“…In order to investigate and visualize the electrolyte distribution in the electrode, Jeon and co-workers employed the multiphase lattice Boltzmann method. [78] The distribution of electrolyte in the electrode was highly nonuniform as increasing the electrode density ( Figure 6c). In particular, in the electrode that was pressed about 40%, the electrolyte mainly existed at the cathode/separator interface, which was ascribed to the blocked electrolyte pathway inside electrode.…”

Section: Electrolyte Wettabilitymentioning

confidence: 99%

“…To confirm the origin of the battery degradation in the high-density electrode, electrochemical impedance spectroscopy (EIS) was carried out after galvanostatically charging the cells to 4.4 V. As discussed earlier, the low-density electrode had larger porosity [78] Copyright 2014, Elsevier. e) Voltage profiles of the NCM cathode electrode with the electrode density of 2.17 and 3.36 g cm −3 , where the operating voltage ranged from 2.0 to 4.0 V. The charge C-rate was fixed with increased discharge C-rate from 0.1C to 1 C. e,f) Reproduced with permission.…”

Section: Exposure Of Each Primary Particlementioning

confidence: 99%

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Prospect and Reality of Ni‐Rich Cathode for Commercialization

Kim

Lee

Cha

et al. 2017

Advanced Energy Materials

644

582

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practical candidate for the wide application of the LIBs with respect to the reversible capacity, rate capability, and capital cost. [4][5][6][7] In terms of nickel contents, the nickel-rich cathodes with nickel content above 80% have advantages in gravimetric capacity, allowing high gravimetric energy density, compared with the nickel content less than 80%. Currently, the nickel-rich cathodes with the amount of nickel less than 60% are fully commercialized. However, the nickel-rich cathodes with nickel content of ≥80% still have many difficulties in the commercialization with respect to powder properties and electrode fabrication process.The unstable powder properties originate from residual lithium compounds such as LiOH and Li 2 CO 3 that formed by the spontaneous reduction of sensitive trivalent nickel ions during the synthesis process and storage in air. [8][9][10][11] The Li 2 CO 3 significantly promotes the gas evolution and increase the moisture of the cathode powder, which strongly related to the safety issue. [12][13][14] Furthermore, the LiOH on the cathode increases the powder pH value, causing the gelation of the slurry during the electrode fabrication process. The nickel-rich cathode with nickel content of ≤60% have acceptable amount of residual lithium compounds for the practical use. By contrast, the cathode with amount of nickel of ≥80% should be treated by additional process to reduce the residual lithium compounds ( Table 1). Furthermore, other powder properties, such as powder pH and moisture, should be carefully controlled when nickel contents were exceeded of ≥80%. Thus, for the practical application of these cathode materials, most battery companies have adapted the washing process, in which the cathode power was stirred in purified water for 20-40 min. [15,16] The washing process could greatly reduce the residual lithium compounds and powder pH value. [15] However, the washing process not only increases process time and capital cost but also make the nickel-rich cathode more chemically sensitive than nonwashed cathodes. [16] More seriously, the water washing deteriorates the thermal stability of the nickel-rich cathodes, indicating that the washing process should be substituted by other methods for the battery safety.Another important factor for the commercialization of the nickel-rich cathodes is the electrode density directly related to the energy density. In general, the nickel-rich cathodesThe layered nickel-rich cathode materials are considered as promising cathode materials for lithium-ion batteries (LIBs) due to their high reversible capacity and low cost. However, several significant challenges, such as the unstable powder properties and limited electrode density, hindered the practical application of the nickel-rich cathode materials with the nickel content over 80%. Herein, important stability issues and in-depth understanding of the nickel-rich cathode materials on the basis of the industrial electrode fabrication condition for the commercialization of the nickel-rich cathode m...

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Section: Electrolyte Wettabilitymentioning

confidence: 99%

Section: Exposure Of Each Primary Particlementioning

confidence: 99%

Prospect and Reality of Ni‐Rich Cathode for Commercialization

Kim

Lee

Cha

et al. 2017

Advanced Energy Materials

644

582

View full text Add to dashboard Cite

show abstract

“…It was found that the liquid water inside the GDL is reduced as the thickness of the MPLs increases. Recently, the LB method has also been applied to batteries [92,93,341]. The first study was conducted by Qiu et al [341].…”

Section: Fuel Cells and Batteriesmentioning

confidence: 99%

“…In 2012, by conducting a three-dimensional simulation of nucleate boiling, Biferale et al [98] demonstrated that the pseudopotential LB model with a non-ideal thermodynamic pressure tensor can lead to a consistent definition of latent heat with the Clausius-Clapeyron relation being satisfied. Using 93 Tanaka et al's thermal phase-field LB model, Sattari et al [114] have also simulated a boiling process (see Fig. 11 in the reference).…”

Section: Boiling and Evaporationmentioning

confidence: 99%

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Lattice Boltzmann methods for multiphase flow and phase-change heat transfer

Luo

Kang

et al. 2016

Progress in Energy and Combustion Science

781

373

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Over the past few decades, tremendous progress has been made in the development of particle-based discrete simulation methods versus the conventional continuum-based methods. In particular, the lattice Boltzmann (LB) method has evolved from a theoretical novelty to a ubiquitous, versatile and powerful computational methodology for both fundamental research and engineering applications. It is a kinetic-based mesoscopic approach that bridges the microscales and macroscales, which offers distinctive advantages in simulation fidelity and computational efficiency. Applications of the LB method are now found in a wide range of disciplines including physics, chemistry, materials, biomedicine and various branches of engineering. The present work provides a comprehensive review of the LB method for thermofluids and energy applications, focusing on multiphase flows, thermal flows and thermal multiphase flows with phase change. The review first covers the theoretical framework of the LB method, revealing certain inconsistencies and defects as well as common features of multiphase and thermal LB models. Recent developments in improving the thermodynamic and hydrodynamic consistency, reducing spurious currents, enhancing the numerical stability, etc., are highlighted. These efforts have put the LB method on a firmer theoretical foundation with enhanced LB models that can achieve larger liquid-gas density ratio, higher Reynolds number and flexible surface tension. Examples of applications are provided in fuel cells and batteries, droplet collision, boiling heat transfer and evaporation, and energy storage. Finally, further developments and future prospect of the LB method are outlined for thermofluids and energy applications.3

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Controllable Solid Electrolyte Interphase in Nickel‐Rich Cathodes by an Electrochemical Rearrangement for Stable Lithium‐Ion Batteries

Kim

Lee

et al. 2017

Advanced Materials

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The layered nickel-rich materials have attracted extensive attention as a promising cathode candidate for high-energy density lithium-ion batteries (LIBs). However, they have been suffering from inherent structural and electrochemical degradation including severe capacity loss at high electrode loading density (>3.0 g cm ) and high temperature cycling (>60 °C). In this study, an effective and viable way of creating an artificial solid-electrolyte interphase (SEI) layer on the cathode surface by a simple, one-step approach is reported. It is found that the initial artificial SEI compounds on the cathode surface can electrochemically grow along grain boundaries by reacting with the by-products during battery cycling. The developed nickel-rich cathode demonstrates exceptional capacity retention and structural integrity under industrial electrode fabricating conditions with the electrode loading level of ≈12 mg cm and density of ≈3.3 g cm . This finding could be a breakthrough for the LIB technology, providing a rational approach for the development of advanced cathode materials.

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Effect of electrode compression on the wettability of lithium-ion batteries

Cited by 79 publications

References 15 publications

Prospect and Reality of Ni‐Rich Cathode for Commercialization

Prospect and Reality of Ni‐Rich Cathode for Commercialization

Lattice Boltzmann methods for multiphase flow and phase-change heat transfer

Controllable Solid Electrolyte Interphase in Nickel‐Rich Cathodes by an Electrochemical Rearrangement for Stable Lithium‐Ion Batteries

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