Optimization of laser-patterned electrode architectures for fast charging of Li-ion batteries using simulations parameterized by machine learning

Article Engineering, Environmental

High-capacity, low-tortuosity LiFePO4-Based composite cathode enabled by self-supporting structure combined with laser drilling technology

Shaoping Wu et al.

Summary: By designing a self-supporting thick electrode with a uniform microchannel structure, the ion and electron transport of the electrode is improved, enhancing the rate capability and capacity retention of the electrode.

CHEMICAL ENGINEERING JOURNAL (2022)

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Article Electrochemistry

Influence of Laser Structuring and Calendering of Graphite Anodes on Electrode Properties and Cell Performance

Lucas Hille et al.

Summary: This study explores the influence of calendering and laser structuring on the pore structure and electrochemical performance of electrodes. Laser structuring was found to release superficial pore clogging caused by calendering and to result in binder agglomerates on the electrode surfaces. Structured electrodes showed higher porosities than unstructured counterparts, but no significant change in the pore size distribution was detected. Electrochemical impedance spectra revealed increasing ionic resistances and tortuosities for decreasing electrode porosities. Laser structuring significantly reduced the diffusion limitations of lithium-ion at all porosity levels. Furthermore, electrode structuring showed potential for improving performance at high currents.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2022)

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Article Chemistry, Multidisciplinary

Modelling and Optimisation of Laser-Structured Battery Electrodes

Lukas Schweighofer et al.

Summary: An electrochemical multi-scale model framework is proposed for simulating arbitrarily three-dimensional structured electrodes for lithium-ion batteries. The model is parameterized using laser ablation and fitted to four experimentally tested cells. The simulations are performed using finite element implementation in two and three dimensions. The virtually optimized cells can reduce prototyping costs and accelerate the production process.

NANOMATERIALS (2022)

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Article Chemistry, Physical

Li+ concentration waves in a liquid electrolyte of Li-ion batteries with porous graphite-based electrodes

Zhiqiang Chen et al.

Summary: Specific Li+ concentration waves can occur in the electrolyte of graphite-based porous electrode/Li cells, which are influenced by both thermodynamics and kinetics.

ENERGY STORAGE MATERIALS (2022)

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Article Chemistry, Physical

Laser ablation of Li-ion electrodes for fast charging: Material properties, rate capability, Li plating, and wetting

Nathan Dunlap et al.

Summary: This study investigates the use of femtosecond pulsed laser ablation to selectively remove electrode material and improve battery performance. The results show that laser ablation can achieve high-rate material removal with minimal damage to the electrode, resulting in improved capacity and wetting behavior. The study also suggests that ablating only the graphite anode can lead to substantial performance benefits compared to ablating both electrodes.

JOURNAL OF POWER SOURCES (2022)

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Article Chemistry, Physical

Visualization of concentration polarization in thick electrodes

Yuntao Guo et al.

Summary: This study investigates the influence of concentration polarization on the crystal structure and chemical properties of active materials in thick electrodes. It verifies the existence of concentration polarization in the configuration of thin-electrode-stacking cells (Scells) for the first time and visualizes the gradient distribution of Li solid-phase content on the section of the thick electrodes using Time of Flight Secondary Ion Mass Spectrometry (TOF-SIMS). Additionally, it clarifies the mechanism of alleviating concentration polarization by constructing holes array on thick electrodes through electrochemical simulation.

ENERGY STORAGE MATERIALS (2022)

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Article Energy & Fuels

Enhanced performance and lifetime of lithium-ion batteries by laser structuring of graphite anodes

Johannes Kriegler et al.

Summary: Laser-induced structures in graphite anodes have been shown to significantly improve the performance characteristics of lithium-ion batteries, including discharge rate capability at different temperatures and discharge/charge rates. The study demonstrated that cells with structured anodes had higher capacity retention after 500 charge and discharge cycles, and post-mortem analyses showed a reduced surface layer formation on the structured anodes compared to their non-structured counterparts.

APPLIED ENERGY (2021)

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Review Geosciences, Multidisciplinary

Tortuosity of porous media: Image analysis and physical simulation

Jinlong Fu et al.

Summary: Tortuosity is widely used as a crucial parameter in predicting transport properties of porous media, with various definitions and evaluation methods introduced. Geometrical and physical tortuosities can differ greatly in value and should not be used interchangeably. Phenomenological relations between geometrical and physical tortuosities have been established for accurate predictions, taking into account the influence of image size and resolution.

EARTH-SCIENCE REVIEWS (2021)

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Article Electrochemistry

Laser structuring of graphite anodes and NMC cathodes-Proportionate influence on electrode characteristics and cell performance

Lucas Hille et al.

Summary: Microscopic diffusion channels were introduced into graphite anodes and NMC622 cathodes through short-pulsed laser radiation to enhance performance. Laser-structured anodes showed significant increase in capacity retention at high rates, with reduced ionic resistances through equivalent circuit modeling. Insights into the impact of anode or cathode structuring are valuable for future lithium-ion battery design and manufacturing.

ELECTROCHIMICA ACTA (2021)

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Article Chemistry, Physical

Enabling 6C Fast Charging of Li-Ion Batteries with Graphite/Hard Carbon Hybrid Anodes

Kuan-Hung Chen et al.

Summary: This study demonstrates that by fabricating hybrid anodes with uniform mixtures of graphite and hard carbon, it is possible to achieve high-energy density and efficient fast charging in Li-ion batteries. The optimized hybrid anodes retain significantly higher specific energy after 500 cycles of fast charging compared to graphite anodes under the same conditions, making them a promising solution for electric vehicles.

ADVANCED ENERGY MATERIALS (2021)

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Article Chemistry, Physical

Beneficial Effects of Three-Dimensional Structured Electrodes for the Fast Charging of Lithium-Ion Batteries

Vittorio De Lauri et al.

Summary: Research on the effect of structuring techniques on the thermal properties and electrochemical performance of batteries shows that 3D structuring can reduce overall cell resistance by improving electrolyte transport, thereby enhancing fast charging capability and reducing the risk of lithium plating.

ACS APPLIED ENERGY MATERIALS (2021)

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Article Materials Science, Multidisciplinary

Automated extraction of physical parameters from experimentally obtained thermal profiles using a machine learning approach

Guanglong Huang et al.

Summary: Computational modeling plays a crucial role in experimental design, but accurate input parameters are essential for reliable predictions. A machine learning approach is proposed to extract uncertain or unknown parameters indirectly, refining their range iteratively based on sampling simulations until convergence. The method successfully determines physical parameters for temperature profiles in a high-temperature crystal growth furnace, demonstrating its applicability and accuracy.

COMPUTATIONAL MATERIALS SCIENCE (2021)

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Article Chemistry, Multidisciplinary

Simulation of the Electrochemical Impedance in a Three-Dimensional, Complex Microstructure of Solid Oxide Fuel Cell Cathode and Its Application in the Microstructure Characterization

Vishwas Goel et al.

Summary: This study simulated the electrochemical impedance of a mixed ion-electron conducting SOFC cathode based on experimentally determined 3D microstructure, revealing a need to modify existing models to account for differences in oxygen vacancy concentrations. The results showed that the effective tortuosity is dependent on frequency and material properties, challenging the prevalent practice of treating tortuosity as a constant value. A method for determining the dependence of tortuosity on material properties and frequency using EIS data was proposed.

FRONTIERS IN CHEMISTRY (2021)

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Article Multidisciplinary Sciences

Enabling the electrochemical simulation of Li-ion battery electrodes with anisotropic tortuosity in COMSOL Multiphysics®

Vishwas Goel et al.

Summary: In this study, the Li-ion battery module in COMSOL 5.4 was modified to simulate the electrochemical behavior of an electrode with anisotropic tortuosity, which is crucial for 3D architectures. The extension of the existing model is necessary for accurately predicting the electrochemical dynamics of Highly ordered laser-patterned electrode (HOLE).

METHODSX (2021)

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Article Electrochemistry

Enabling fast charging of lithium-ion batteries through secondary-/dual- pore network: Part II - numerical model

Weijie Mai et al.

ELECTROCHIMICA ACTA (2020)

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Article Electrochemistry

Enabling fast charging of lithium-ion batteries through secondary-/dual- pore network: Part I - Analytical diffusion model

F. L. E. Usseglio-Viretta et al.

ELECTROCHIMICA ACTA (2020)

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Article Electrochemistry

A comparative study of particle size and hollowness of LiNi1/3Co1/3Mn1/3O2 cathode materials for high-power Li-ion batteries: effects on electrochemical performance

Taira Aida et al.

JOURNAL OF SOLID STATE ELECTROCHEMISTRY (2020)

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Article Electrochemistry

Simulation of the diffusional impedance and application to the characterization of electrodes with complex microstructures

Hui-Chia Yu et al.

ELECTROCHIMICA ACTA (2020)

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Article Chemistry, Physical

Efficient fast-charging of lithium-ion batteries enabled by laser-patterned three-dimensional graphite anode architectures

Kuan-Hung Chen et al.

JOURNAL OF POWER SOURCES (2020)

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Article Electrochemistry

GITT Analysis of Lithium Insertion Cathodes for Determining the Lithium Diffusion Coefficient at Low Temperature: Challenges and Pitfalls

A. Nickol et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2020)

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Review Energy & Fuels

Challenges and opportunities towards fast-charging battery materials

Yayuan Liu et al.

NATURE ENERGY (2019)

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Article Electrochemistry

Modeling and Simulation of Pore Morphology Modifications using Laser-Structured Graphite Anodes in Lithium-Ion Batteries

Ludwig Kraft et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2019)

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Article Electrochemistry

Full Homogenized Macroscale Model and Pseudo-2-Dimensional Model for Lithium-Ion Battery Dynamics: Comparative Analysis, Experimental Verification and Sensitivity Analysis

Harikesh Arunachalam et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2019)

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Article Electrochemistry

Requirements for Enabling Extreme Fast Charging of High Energy Density Li-Ion Cells while Avoiding Lithium Plating

Andrew M. Colclasure et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2019)

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Article Electrochemistry

Enhanced Fast Charging and Reduced Lithium-Plating by Laser-Structured Anodes for Lithium-Ion Batteries

Jan Bernd Habedank et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2019)

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Review Materials Science, Multidisciplinary

Tortuosity in electrochemical devices: a review of calculation approaches

Bernhard Tjaden et al.

INTERNATIONAL MATERIALS REVIEWS (2018)

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Article Electrochemistry