Opening twisted polymer chains for simultaneously high printability and battery fast-charge

Wang, Ying; He, Jinlong; Cao, Daxian; Cakmak, Ercan; Zhao, Xianhui; Wu, Qingliu; Zhao, Yuyue; Ren, Haoze; Sun, Xiao; Li, Ying; Zhu, Hongli

doi:10.1016/j.ensm.2022.11.025

DOE OSTI · 1901640

Opening twisted polymer chains for simultaneously high printability and battery fast-charge

Wang, Ying·He, Jinlong·Cao, Daxian·Cakmak, Ercan·Zhao, Xianhui·Wu, Qingliu·Zhao, Yuyue·Ren, Haoze·Sun, Xiao·Li, Ying·Zhu, Hongli

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Abstract

Fast-charging is key to the widespread adoption of battery-based electric vehicles. However, improving fast-charging through architecture optimization is expensive. To reduce costs and expand to commercialization, we applied roll-to-roll screen printing technology to create channels and decrease the tortuosity of electrodes. For the first time, this work successfully opened twisted polymer chains within high-solid-content inks to improve their screen printability and battery performance of as-printed electrodes. With LiNi 0.6 Mn 0.2 Co 0.2 O 2 as active materials, the 60% solid content ink presents superior screen printability after opening the twisted binder chains. As-printed electrode exhibits 33% higher charge capacity at 6 C than printed electrode with chains twisted ink at mass loading of 6.5 mg/cm 2 . Furthermore, coarse-grained molecular dynamics simulations are performed to study the underlying mechanism systematically. In conclusion, the new ink preparation procedure provides a scalable, effective strategy for manufacturing screen-printable battery ink and promotes screen-printed electrode technology.

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25 ENERGY STORAGE Lattice Boltzmann method ink preparation polymer chains printability screen printing

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Wang, Ying, He, Jinlong, Cao, Daxian, Cakmak, Ercan, Zhao, Xianhui, Wu, Qingliu, Zhao, Yuyue, Ren, Haoze, Sun, Xiao, Li, Ying, Zhu, Hongli. 2022-11-15. Opening twisted polymer chains for simultaneously high printability and battery fast-charge. https://doi.org/10.1016/j.ensm.2022.11.025

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