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在离子电池正极电极中,一种替代PVDF粘合剂和碳添加剂的聚合物材料

Ivone Marselina Nugraha^1,2,3,4, Jacob Olchowka^1,3,4, Cyril Brochon²

¹Univ. Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, Pessac, F-33600, France.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|October 21, 2024

概括

一种新的聚3,4-乙烯二氧化硫):聚4- styrenesulfonyl (trifluoromethylsulfonyl) imide (PEDOT:PSSTFSI) 结合剂提高了离子电池的性能. 这种替代聚乙烯化物 (PVDF) 的替代品提高了导电性和循环稳定性.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
聚合物科学聚合物科学

背景情况:

离子电池的性能取决于电极微观结构和接口.
粘合器对于电极完整性至关重要,连接组件和粘附于电流收集器.
传统的聚乙烯化物 (PVDF) 结合剂具有诸如有毒溶剂,低导电性和差的界面相互作用等缺点.

研究的目的:

为了研究Poly{3,4-乙烯二氧化):poly[{4-styrenesulfonyl) (trifluoromethylsulfonyl) imide] (PEDOT:PSSTFSI) 作为双重功能结合剂和导电添加剂.
在离子电池中用LiFe0.4Mn0.6PO4正电极取代PVDF和碳黑.
评估PEDOT:PSSTFSI对电化学性能和电极性能的影响.

主要方法:

使用PEDOT:PSSTFSI作为粘合剂和导电添加剂制造离子电池电极.
在各种C率和活性质量负载下对电极进行电化学测试.
分析电极微观结构和离子/电子传输特性.

主要成果:

与PVDF和碳黑相比,PSSTFSI显著提高了电极内的电子导电性和扩散.
提高了电化学性能,特别是在高C率和高活性质量负载下.
证明了出色的长距离循环性,表明了增强的电极稳定性.

结论:

PEDOT:PSSTFSI为离子电池中的常规粘合剂提供了一个有希望的替代品.
这种材料提高了关键的电化学性能,使得性能和耐用性更高.
双重功能减少了加工复杂性和对额外导电添加剂的依赖.

关键词:

离子电池的正极电极是正极电极.聚三四乙烯二氧化) (PEDOT) 的使用.混合导电聚合物混合导电聚合物橄酸 LiFe1‐yMnyPO4 的含量.聚合物粘合剂聚合物粘合剂

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