Scalable Dry Printing Manufacturing to Enable Long‐Life and High Energy Lithium‐Ion Batteries
Scalable Dry Printing Manufacturing to Enable Long‐Life and High Energy Lithium‐Ion Batteries
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DOI：
10.1002/admt.201700106
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发表时间：
2017-10
影响因子：
6.8
通讯作者：
Jin Liu;B. Ludwig;Yangtao Liu;Zhangfeng Zheng;Fan Wang;Ming-Shao Tang;Jiajun Wang;Jia-ling Wang;H. Pan;Yan Wang
中科院分区：
文献类型：
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作者：
Jin Liu;B. Ludwig;Yangtao Liu;Zhangfeng Zheng;Fan Wang;Ming-Shao Tang;Jiajun Wang;Jia-ling Wang;H. Pan;Yan Wang
浆料浇铸法在锂离子电池电极制造中占主导地位。整个过程类似于报纸印刷，包括将浇铸材料均匀地预混合到溶剂中，并将浆料混合物连续地转移和干燥到集电器上。作为一个到2024年接近800亿美元的市场，制造过程的优化至关重要且具有吸引力。然而，有机溶剂在用于制备浆料的湿法中仍然是不可替代的，即使它是资本密集型的并且有毒。在这里，展示了一种完全无溶剂和干燥的先进粉末印刷技术。通过去除溶剂和相关程序，该方法预计可在显著缩短生产周期（从数小时到数分钟）的情况下节省20%的成本。干印刷电极在650次循环中优于商业浆料浇铸电极（在500次循环中80%容量保持率），并且成功地制造了厚电极以增加能量密度。利用显微镜技术分析了干印刷和湿印刷电极微观结构的差异，并比较了干印刷在控制电极微观结构方面的优势。总之，这项研究证明了一种实用的锂离子电极制造方法，具有较低的成本和良好的性能，并可能允许更先进的电极设计。
Slurry casting method dominates the electrode manufacture of lithium‐ion batteries. The entire procedure is similar to the newspaper printing that includes premixing of cast materials into solvents homogeneously, and continuously transferring and drying the slurry mixture onto the current collector. As a market approaching US $80 billion by 2024, the optimization of manufacture process is crucial and attractive. However, the organic solvent remains irreplaceable in the wet method for making slurries, even though it is capital‐intensive and toxic. Here, an advanced powder printing technique is demonstrated that is completely solvent‐free and dry. Through removing the solvent and related procedures, this method is anticipated to statistically save 20% of the cost at a remarkably shortened production cycle (from hours to minutes). The dry printed electrodes outperform commercial slurry cast ones in 650 cycles (80% capacity retention in 500 cycles), and thick electrodes are successfully fabricated to increase the energy density. Furthermore, microscopy techniques are utilized to characterize the difference of electrode microstructure between dry and wet methods, and distinguish dry printing's advantages on controlling the microstructure. In summary, this study proves a practical fabrication method for lithium‐ion electrodes with lowered cost and favorable performance, and allows more advanced electrode designs potentially.