Manufacturing Water-Based Low-Tortuosity Electrodes for Fast-Charge through Pattern Integrated Stamping

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Abstract

Achieving high energy density and fast charging of lithium-ion batteries can accelerate the promotion of electric vehicles. However, the increased mass loading causes poor charge transfer, impedes the electrochemical reaction kinetics, and limits the battery charging rate. Herein, this work demonstrated a novel pattern integrated stamping process for creating channels in the electrode, which benefits ion transport and increases the rate performance of the electrode. Meanwhile, the pressure applied during the stamping process improved the contact between electrode and current collector and also enhanced the mechanical stability of the electrode. Compared to the conventional bar-coated electrode with the same thickness of 155 μm (delivered a discharge capacity of 16 mAh g−1 at the rate of 3 C), the stamped low-tortuosity LiFePO4 electrode delivered 101 mAh g−1 capacity. Additionally, water was employed as a solvent in this study. Owing to its eco-friendliness, high scalability, and minimal waste generation, this novel stamping technique inspire a new method for the industrial-level efficient roll to roll fabrication of fast-charge electrodes.

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APA

Ren, H., Wang, Y., Cao, D., Gedney, W., Ji, T., Sun, X., & Zhu, H. (2023). Manufacturing Water-Based Low-Tortuosity Electrodes for Fast-Charge through Pattern Integrated Stamping. Energy and Environmental Materials, 6(4). https://doi.org/10.1002/eem2.12584

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