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通过阴性聚合物粘合剂调节静电现象,用于可扩展的高面积容量的电池电极

Jung-Hui Kim¹, Kyung Min Lee², Ji Won Kim³

¹Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, Republic of Korea.

Nature communications

|September 15, 2023

概括

一种新的阴离子半透聚合物网络 (c-IPN) 粘合剂通过提高结构稳定性和电荷转移来增强电池电极. 这种结合剂可使高面积容量的正极具有更好的循环利用性和能量密度,用于实际应用.

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:

高面积容量的电池电极面临着结构不稳定性和不均的电荷传递的挑战.
传统的粘合剂限制了电极性能和实际应用.
需要先进的粘合剂策略来改善电极完整性和离子传输.

研究的目的:

为电池电极引入阴离子半透聚合物网络 (c-IPN) 作为一种新的粘合剂.
研究静电现象在调节电极特性中的作用.
为了证明c-IPN在高性能,可扩展的电池应用中的潜力.

主要方法:

开发和应用一个半透性聚合物网络 (c-IPN) 粘合剂.
电极属性的表征,包括结构完整性,组件分散和电荷转移.
电极和全电池的电化学测试,包括循环稳定性和能量密度测量.

主要成果:

c-IPN粘合剂在溶剂干燥过程中抑制电极裂纹,并通过静电排斥和机械性增强组件分散.
通过c-IPN的静电吸引使电解质离子不动化,促进Li +导电,形成稳定的阴极-电解质介面相.
在使用LiNi0.8Co0.1Mn0.1O2.2,在100个循环后保持82%容量的高面积容量 (20mAh cm-2) 阴极.
开发了具有高能量含量的双叠囊细胞 (376 Wh kgcell-1 / 1043 Wh Lcell-1).

结论:

该c-IPN绑定器策略有效地解决了高面积容量电极中的结构不稳定性和电荷传输问题.
这种方法证明了可扩展,高能电池电极的实际可行性.
该c-IPN绑定器显示了下一代电池技术的重大前景.

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