Large‐Scale Manufacturing of Pattern‐Integrated Paper Li‐Ion Microbatteries through Roll‐to‐Roll Flexographic Printing
Large‐Scale Manufacturing of Pattern‐Integrated Paper Li‐Ion Microbatteries through Roll‐to‐Roll Flexographic Printing
复制标题
DOI：
10.1002/admt.202200303
复制
发表时间：
2022-05
影响因子：
6.8
通讯作者：
Ying Wang;D. Cao;Xiao Sun;Hao-Ming Ren;T. Ji;Xiaoning Jin;J. Morse;Barbara Stewart;Hongli Zhu
中科院分区：
文献类型：
--
作者：
Ying Wang;D. Cao;Xiao Sun;Hao-Ming Ren;T. Ji;Xiaoning Jin;J. Morse;Barbara Stewart;Hongli Zhu
电极结构显著影响锂离子电池（LiBs）的电化学性能、柔韧性和应用。然而，用于制造电极的传统刮涂法限制了定制结构或图案的添加。在这项研究中，作为一种新方法，通过大规模卷对卷（R2R）柔性版印刷将图案集成到电极中。此外，在印刷锂离子电池制造过程中，创新性地将柔性、可回收和可生物降解的纸张用作印刷基底，其展现出优异的印刷适性。而且，纸张用一层薄的Al₂O₃进行改性，以在印刷锂离子电池中用作隔膜。涂覆Al₂O₃的纸张使印刷具有良好的润湿性，为高速卷对卷制造提供优异的机械性能，并为锂离子电池的安全稳定运行提供出色的热稳定性。组装的纸质电池在3C下循环1000次后表现出近100%的放电容量保持率以及出色的倍率性能。这项工作为未来结合高分辨率结构设计的大规模微型电池制造提供了灵感。
Electrode architectures significantly influence the electrochemical performance, flexibility, and applications of lithium‐ion batteries (LiBs). However, the conventional bar coating for fabricating electrodes limits the addition of customized architecture or patterns. In this study, as a novel approach, patterns are integrated into electrodes through large‐scale roll‐to‐roll (R2R) flexographic printing. Additionally, flexible, recyclable, and biodegradable paper are innovatively used as a printing substrate during printing LiBs manufacturing, which exhibited superior printability. Moreover, the paper is modified with a thin‐layer Al2O3 to function as the separator in the printed LiB. The Al2O3‐coated paper enables an admirable wettability for printing, excellent mechanical properties for high‐speed R2R manufacturing, and outstanding thermal stability for the safe and stable operation of LiBs. The assembled paper cells exhibit nearly 100% discharge capacity retention after 1000 cycles at 3 C and outstanding rate performance. This work inspires future large‐scale microbatteries manufacturing integrated with high‐resolution architecture designs.