Combined with the traditional preparation method of graphite anode slurry for lithium battery and the manufacturing technology of pneumatic jet, the organic solvent-based anode slurry is selected to explore the viscosity curve under different solid–liquid ratios. It is judged that the anode slurry is a non-Newtonian fluid. It has printability and meets the requirements of direct writing molding technology. The slurry with a solid volume fraction of 50% is selected as the printing material, the graphite anode slurry is molded on the copper foil by a pneumatic printing device and the electrochemical performance of the coin lithium-ion battery is analyzed. The effect of printing structure and printing interval on the electrochemical performance of lithium-ion batteries is studied and compared with batteries prepared by traditional coating processes. Finally, the linear electrode pattern is selected to discuss the effect of printing layers on the electrochemical performance of lithium-ion batteries. The results show that the areal specific capacity of the printed electrode is significantly higher than that of the traditional coated electrode and the shape, interval, and the number of layers of the printing electrode have a significant effect on the performance of the battery.

中文翻译：

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高比容量锂离子电池石墨电极的3D打印

结合传统锂电池石墨负极浆料的制备方法和气动喷射制造技术，选择有机溶剂型负极浆料，探索不同固液比下的粘度曲线。判断阳极浆料为非牛顿流体。具有印刷适性，符合直写成型技术要求。选择固体体积分数为50%的浆料作为印刷材料，通过气动印刷装置将石墨负极浆料成型在铜箔上，分析纽扣锂离子电池的电化学性能。研究了印刷结构和印刷间隔对锂离子电池电化学性能的影响，并与传统涂层工艺制备的电池进行了比较。最后，选择线性电极图案来讨论印刷层对锂离子电池电化学性能的影响。结果表明，印刷电极的面积比容量明显高于传统涂层电极，且印刷电极的形状、间距和层数对电池性能有显着影响。