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Adhesion-enhanced PVDF binder suitable for large-sized Li-ion batteries

机译:粘合力增强的PVDF粘合剂,适用于大型锂离子电池

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摘要

Durability and high-current capability are fundamental properties of lithium ion batteries (LIB) designed for hybrid electric vehicles (HEV). Binder for electrodes of LIB is one of the key materials that greatly affect these properties. Therefore, we investigated the performance of polyvinylidenefluoride (PVDF) binder from the standpoint of HEV use using test cells by changing type of PVDF, such as molecular weight and modification of PVDF, and the content in electrode. As a result, we found that the binder content should be optimized minimally within the adequate adhesion strength of electrode in order to balance durability and high-current capability, and also the optimized content depends on the type of PVDF. Molecularly-designed PVDF to enlarge adhesion led to higher current capability than the conventional type of PVDF binder used for portable LIB.
机译:耐用性和高电流能力是专为混合动力汽车(HEV)设计的锂离子电池(LIB)的基本特性。 LIB电极粘合剂是严重影响这些性能的关键材料之一。因此,我们通过改变PVDF的类型,例如分子量和PVDF的改性以及电极中的含量,从使用HEV的角度出发,通过使用测试电池来研究聚偏二氟乙烯(PVDF)粘合剂的性能。结果,我们发现,为了平衡耐久性和高电流能力,应该在电极的足够粘合强度内最小地优化粘合剂含量,并且优化的含量取决于PVDF的类型。与用于便携式LIB的常规类型的PVDF粘合剂相比,分子设计的PVDF可以增加粘附力,从而具有更高的电流容量。

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