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用于电化学稳定的VOPO₄ 2H₂O的水性粘合剂用于离子存储的阳极

Alexander Beutl¹, Andrea Paolella^1,2, Yuri Surace¹

¹Center for Transport Technologies, Battery Technologies, AIT Austrian Institute of Technology GmbH, Giefinggasse 2, 1210, Vienna, Austria.

|June 18, 2025

概括

像CMC-PAA这样的水性粘合剂提供稳定的电池性能,取代有毒的PVDF/NMP溶剂,以实现更安全,更环保的制造. 这促进了长期的循环寿命和增强的离子扩散.

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
可持续能源可持续能源

背景情况:

传统的电池制造使用有毒的N-甲基化 (NMP) 溶剂与聚乙烯二化 (PVDF) 结合剂,造成安全和环境问题.
开发水性结合剂对于环保和更安全的电池生产过程至关重要.

研究的目的:

为了评估水热VOPO4·2H2O阳极材料与水性结合物的性能:碳素甲基纤维素 (CMC),聚烯酸 (PAA) 和CMC-PAA混合物.
将水性结合剂的电化学性能与标准的PVDF结合剂进行比较.

主要方法:

电化学测试包括静电循环,循环电压测量和电化学阻抗光谱.
使用CMC,PAA和CMC-PAA水性结合物的VOPO4·2H2O阳极材料与PVDF的性能评估.

主要成果:

CMC-PAA水性粘合剂表现出最稳定的电化学性能,确保均的VOPO4·2H2O分布和强大的粘合力,以延长循环寿命.
与PVDF不同的是,与CMC-PAA粘合剂形成了一个稳定的固体电解质间相 (SEI) 层.
由于改善的离子扩散和电子导电性,观察到不同速率的稳定循环寿命.

结论:

水性结合剂,特别是CMC-PAA混合物,是用于VOPO4·2H2O阳极的PVDF/NMP的有效替代品,提高了电池的安全性和可持续性.
CMC-PAA 绑定器促进了稳定的 SEI 层的形成,从而实现了卓越的长期循环稳定性和速率能力.

关键词:

这就是VOPO4的意思.热水制法是一种热水制法.离子电池的离子电池聚烯酸是一种多烯酸.聚乙烯二化物聚乙烯二化物碳酸甲基纤维素.

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