Designing Low Tortuosity Electrodes through Pattern Optimization for Fast-Charging

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

doi:10.1002/smtd.202201344

Designing Low Tortuosity Electrodes through Pattern Optimization for Fast-Charging

Journal Article · Mon Feb 20 00:00:00 EST 2023 · Small Methods

DOI:https://doi.org/10.1002/smtd.202201344· OSTI ID:1959580

^[1]; ^[2]; Cao, Daxian ^[1]; Ji, Tongtai ^[1]; Ren, Haoze ^[1]; Wang, Guanyi ^[3]; Wu, Qingliu ^[3]; ^[1]

Northeastern Univ., Boston, MA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Western Michigan Univ., Kalamazoo MI (United States)

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. Finally, 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.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725; EE0009111

OSTI ID:: 1959580

Journal Information:: Small Methods, Journal Name: Small Methods Journal Issue: 4 Vol. 7; ISSN 2366-9608

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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