激光和对流混合干燥工艺优化锂离子电池磷酸铁锂正极生产

IF 2.6 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Sebastian Wolf, Niklas Schwenzer, Tim Tratz, Vinzenz Göken, Markus Börner, Daniel Neb, Heiner Heimes, Martin Winter, Achim Kampker
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引用次数: 0

摘要

锂离子电池的电极干燥是电池生产中最耗能、成本最高的工艺步骤之一。基于激光的干燥工艺由于其直接能量输入、激光光斑内的空间均匀性和快速可控性而成为电极制造的有希望的候选者。然而,目前尚不清楚电极和电池质量在多大程度上受到较高的加热和干燥速率的影响。混合系统作为激光和对流为基础的干燥结合进行了实验研究与水处理的LFP阴极。将制备的电极与纯激光干燥和纯对流干燥样品在干燥时间和质量特性方面进行了比较。电极的物理性质,如附着力和电子导电性,以及电化学性能使用速率能力进行表征。在附着力和电子导电性方面,激光和对流混合干燥过程中干燥的lfp基阴极与常规干燥阴极相比具有相似的质量特性,同时显著缩短了总体干燥时间。在电化学性能方面,通过速率能力来衡量,所使用的干燥技术之间没有显着差异。这些发现证明了激光和对流混合干燥LFP阴极的巨大潜力,可以在能源效率和操作成本方面提高电极干燥过程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Optimized LiFePO4-Based Cathode Production for Lithium-Ion Batteries through Laser- and Convection-Based Hybrid Drying Process
The drying of electrodes for lithium-ion batteries is one of the most energy- and cost-intensive process steps in battery production. Laser-based drying processes have emerged as promising candidates for electrode manufacturing due to their direct energy input, spatial homogeneity within the laser spot, and rapid controllability. However, it is unclear to what extent electrode and cell quality are affected by higher heating and drying rates. Hybrid systems as a combination of laser- and convection-based drying were investigated in an experimental study with water-processed LFP cathodes. The manufactured electrodes were compared with purely laser-dried and purely convection-dried samples in terms of drying times and quality characteristics. The electrodes were characterized with regard to physical properties like adhesion and electronic conductivity, as well as electrochemical performance using the rate capability. Regarding adhesion and electronic conductivity, the LFP-based cathodes dried in the hybrid-drying process by laser and convection showed similar quality characteristics compared to conventionally dried cathodes, while, at the same time, significantly reducing the overall drying time. In terms of electrochemical performance, measured by the rate capability, no significant differences were found between the drying technologies used. These findings demonstrate the great potential of laser- and convection-based hybrid drying of LFP cathodes to enhance the electrode-drying process in terms of energy efficiency and operational costs.
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来源期刊
World Electric Vehicle Journal
World Electric Vehicle Journal Engineering-Automotive Engineering
CiteScore
4.50
自引率
8.70%
发文量
196
审稿时长
8 weeks
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