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公开(公告)号：US20240213437A1
公开(公告)日：2024-06-27
申请号：US18545285
申请日：2023-12-19
发明人： Hongli Zhu , Ying Wang
CPC分类号： H01M4/0414 , H01M4/505 , H01M4/525 , H01M4/623 , H01M4/625 , H01M2220/20 , H01M2220/30
摘要： A screen-printable electrode battery ink is described comprising a slurry of an active ingredient, conductive additive, a binder, and a solvent, the slurry having a solids content from about 40% by weight to about 70% by weight that is uniformly distributed in the solvent, wherein the ink has a thixotropic recovery rate from about 30 seconds to about 90 seconds, and wherein the binder has untwisted molecular chains. Methods for making the screen-printable electrode battery ink are also described. The screen-printable electrode battery inks can be used to screen print electrodes, for use in fast-charging battery. Fast-charging batteries can be incorporated into electronic devices, such as electric vehicles.
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2.发明公开公开(公告)号：US20240290937A1
公开(公告)日：2024-08-29
申请号：US18589258
申请日：2024-02-27
发明人： Hongli Zhu , Ying Wang
IPC分类号： H01M4/04 , H01M4/02 , H01M4/131 , H01M4/1391 , H01M4/525
CPC分类号： H01M4/0414 , H01M4/0404 , H01M4/131 , H01M4/1391 , H01M4/525 , H01M2004/021 , H01M2004/028
摘要： 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. A facile, low-cost, highly controllable, and high-output continual additive manufacturing roll-to-roll screen printing technology is disclosed herein to render customized vertical channels within electrodes. High-accuracy vertical channels were fabricated by applying as-developed inks, using LiNi0.6Mn0.2Co0.2O2, for example, as the cathode material. The optimized screen-printed electrode exhibited a seven-fold higher specific charge capacity (72 mAh/g) at a current rate of 6 C and superior stability compared with that of the conventional bar-coated electrode (10 mAh/g, 6 C) at a mass loading of 10 mg/cm2.
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