Dry Electrode Processing Technology and Binders

Dry Electrode Processing Technology and Binders

15 May 2024 | Kaiqi Zhang, Dan Li, Xuehan Wang, Jingwan Gao, Huilin Shen, Hao Zhang, Changrui Rong, and Zheng Chen
The paper provides a comprehensive overview of dry electrode processing technology and binders, highlighting the advancements and challenges in lithium-ion battery (LIB) manufacturing. Dry electrode technology, an emerging field, offers significant advantages over traditional wet processing methods, such as reduced environmental impact, lower production costs, and improved battery performance. The paper discusses five primary dry processing methods: dry spraying deposition (DSD), melt extrusion, 3D printing, powder compression, and polymer fibrillation. Each method is detailed with specific examples and applications, emphasizing the unique characteristics and potential of each process. For instance, DSD involves uniform mixing and deposition of active materials onto a collector, followed by pressing to form the electrode. Melt extrusion uses a twin-screw extruder to mix and extrude the active materials, which are then pressed into the final electrode. 3D printing, particularly fused deposition modeling (FDM), is solvent-free and allows for precise customization of electrode shapes and sizes. Powder compression involves direct pressing of dry active materials without the need for binders, while polymer fibrillation uses fibrillated polymers like polytetrafluoroethylene (PTFE) to form a stable electrode layer. The paper also explores the latest advancements in binders for these processes, including the use of sacrificial and permanent binders, and discusses the challenges and future prospects of dry electrode technology. Overall, the paper underscores the potential of dry electrode technology to enhance the efficiency, cost-effectiveness, and performance of lithium-ion batteries.The paper provides a comprehensive overview of dry electrode processing technology and binders, highlighting the advancements and challenges in lithium-ion battery (LIB) manufacturing. Dry electrode technology, an emerging field, offers significant advantages over traditional wet processing methods, such as reduced environmental impact, lower production costs, and improved battery performance. The paper discusses five primary dry processing methods: dry spraying deposition (DSD), melt extrusion, 3D printing, powder compression, and polymer fibrillation. Each method is detailed with specific examples and applications, emphasizing the unique characteristics and potential of each process. For instance, DSD involves uniform mixing and deposition of active materials onto a collector, followed by pressing to form the electrode. Melt extrusion uses a twin-screw extruder to mix and extrude the active materials, which are then pressed into the final electrode. 3D printing, particularly fused deposition modeling (FDM), is solvent-free and allows for precise customization of electrode shapes and sizes. Powder compression involves direct pressing of dry active materials without the need for binders, while polymer fibrillation uses fibrillated polymers like polytetrafluoroethylene (PTFE) to form a stable electrode layer. The paper also explores the latest advancements in binders for these processes, including the use of sacrificial and permanent binders, and discusses the challenges and future prospects of dry electrode technology. Overall, the paper underscores the potential of dry electrode technology to enhance the efficiency, cost-effectiveness, and performance of lithium-ion batteries.
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Understanding Dry Electrode Processing Technology and Binders