Designing Low Tortuosity Electrodes through Pattern Optimization for Fast-Charging

Ying Wang; Yuxuan Zhang; Daxian Cao; Tongtai Ji; Haoze Ren; Guanyi Wang; Qingliu Wu; Hongli Zhu

doi:10.1002/smtd.202201344

Designing Low Tortuosity Electrodes through Pattern Optimization for Fast-Charging

Ying Wang, Yuxuan Zhang, Daxian Cao, Tongtai Ji, Haoze Ren, Guanyi Wang, Qingliu Wu, Hongli Zhu

Materials Engineering

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

The development of fast-charging technologies is crucial for expediting the progress and promotion of electric vehicles. In addition to innovative material exploration, reduction in the tortuosity of electrodes is a favored strategy to enhance the fast-charging capability of lithium-ion batteries by optimizing the ion-transfer kinetics. To realize the industrialization of low-tortuosity electrodes, a facile, cost-effective, highly controlled, and high-output continuous additive manufacturing roll-to-roll screen printing technology is proposed to render customized vertical channels within electrodes. Extremely precise vertical channels are fabricated by applying the as-developed inks, using LiNi_0.6Mn_0.2Co_0.2O₂ as the cathode material. Additionally, the relationship between the electrochemical properties and architecture of the channels, including the pattern, channel diameter, and edge distance between channels, is revealed. The optimized screen-printed electrode exhibited a seven-fold higher charge capacity (72 mAh g⁻¹) at a current rate of 6 C and superior stability compared with that of the conventional bar-coated electrode (10 mAh g⁻¹, 6 C) at a mass loading of 10 mg cm⁻². This roll-to-roll additive manufacturing can potentially be applied to various active materials printing to reduce electrode tortuosity and enable fast charging in battery manufacturing.

Original language	English
Article number	2201344
Journal	Small Methods
Volume	7
Issue number	4
DOIs	https://doi.org/10.1002/smtd.202201344
State	Published - Apr 20 2023

Funding

H. Z. acknowledges the support by the U.S. Department of Energy's Office on Energy Efficiency and Renewable Energy (EERE) under the Advanced Manufacturing Office, award number DE-EE0009111. The authors appreciate Nanoramic Laboratories (Wakefield, MA 01880, USA) for providing polycrystalline NMC 622 for this study. The authors thank Northeastern University Center for Renewable Energy Technology (NUCRET) for the use of SEM. This research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). This article has been contributed to by US Government contractors and their work is in the public domain in the USA. H. Z. acknowledges the support by the U.S. Department of Energy's Office on Energy Efficiency and Renewable Energy (EERE) under the Advanced Manufacturing Office, award number DE‐EE0009111. The authors appreciate Nanoramic Laboratories (Wakefield, MA 01880, USA) for providing polycrystalline NMC 622 for this study. The authors thank Northeastern University Center for Renewable Energy Technology (NUCRET) for the use of SEM. This research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. This manuscript has been authored by UT‐Battelle, LLC, under contract DE‐AC05‐00OR22725 with the US Department of Energy (DOE). This article has been contributed to by US Government contractors and their work is in the public domain in the USA.

Keywords

continuous additive manufacturing
fast-charging
low-tortuosity
screen printing
vertical channel design

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/smtd.202201344

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abstract = "The development of fast-charging technologies is crucial for expediting the progress and promotion of electric vehicles. In addition to innovative material exploration, reduction in the tortuosity of electrodes is a favored strategy to enhance the fast-charging capability of lithium-ion batteries by optimizing the ion-transfer kinetics. To realize the industrialization of low-tortuosity electrodes, a facile, cost-effective, highly controlled, and high-output continuous additive manufacturing roll-to-roll screen printing technology is proposed to render customized vertical channels within electrodes. Extremely precise vertical channels are fabricated by applying the as-developed inks, using LiNi0.6Mn0.2Co0.2O2 as the cathode material. Additionally, the relationship between the electrochemical properties and architecture of the channels, including the pattern, channel diameter, and edge distance between channels, is revealed. The optimized screen-printed electrode exhibited a seven-fold higher charge capacity (72 mAh g−1) at a current rate of 6 C and superior stability compared with that of the conventional bar-coated electrode (10 mAh g−1, 6 C) at a mass loading of 10 mg cm−2. This roll-to-roll additive manufacturing can potentially be applied to various active materials printing to reduce electrode tortuosity and enable fast charging in battery manufacturing.",

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Designing Low Tortuosity Electrodes through Pattern Optimization for Fast-Charging

Abstract

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Keywords

UN SDGs

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