中国科学院长春应用化学研究所张新波团队报道了金属离子电池用聚合物织物阴极的迭代设计。相关研究成果发表在2024年8月14日出版的国际学术期刊《科学通报》。

有机电极材料（OEMs）因其丰富的资源和灵活的设计而引起了人们对水性锌离子电池（AZIBs）使用的极大关注。然而，高性能OEMs的发展受到其高溶解度、低导电性、缓慢的离子扩散动力学和难以与Zn²⁺配位的严重阻碍。

该文中，受织物工艺的启发，研究人员通过构建块从点到线和平面的迭代进化设计了一种坚固的聚合物织物。从点到线的演变不仅可以提高结构稳定性和导电性，还可以调整活性位点的排列，使Zn2+的储存成为可能。除了进一步增强上述特性外，从线到平面的演变还可以促进离子迁移的无干扰通道的构建。

因此，聚（1,4,5,8-萘四甲酸二酐/2,3,5,6-四氨基环己-2,5-二烯-1,4-二酮）（PNT）聚合物织物具有最增强的结构稳定性、优化的活性位点排列、改进的电导率和合适的离子通道，在56.9mg cm^-2的高质量负载下，AZIBs的容量保持率达到96%，在150℃（1C=200mA g^-1）下的稳定循环寿命超过20000次。此外，PNT对Li/Na/K离子电池等有机电解质系统中的各种离子具有通用性。

研究人员对聚合物织物阴极的迭代设计，为先进原始设备制造商提高金属离子电池性能的发展奠定了基础。

附：英文原文

Title: Iterative design of polymer fabric cathode for metal-ion batteries

Author: Wanqiang Liu a, Gang Huang b, Xinbo Zhang b

Issue&Volume: 2024/08/14

Abstract: Organic electrode materials (OEMs) have attracted significant attention for use in aqueous zinc-ion batteries (AZIBs) because of their abundant resources and flexible designability. However, the development of high-performance OEMs is strongly hindered by their high solubility, poor conductivity, sluggish ion diffusion kinetics, and difficult coordination toward Zn2+. Herein, inspired by fabric crafts, we have designed a robust polymer fabric through the iterative evolution of the building blocks from point to line and plane. The evolution from point to line could not only improve the structural stability and electrical conductivity but also adjust the active site arrangement to enable the storage of Zn2+. In addition to further boosting the aforementioned properties, the evolution from line to plane could also facilitate the construction of noninterference channels for ion migration. Accordingly, the poly(1,4,5,8-naphthalenetetracarboxylic dianhydride/2,3,5,6-tetraaminocyclohexa-2,5-diene-1,4-dione) (PNT) polymer fabric has the most enhanced structural stability, optimized active site arrangement, improved electrical conductivity, and suitable ion channels, resulting in a record-high capacity retention of 96% at a high mass loading of 56.9 mg cm2 and a stable cycle life of more than 20,000 cycles at 150 C (1 C = 200 mA g1) in AZIBs. In addition, PNT exhibits universality for a wide range of ions in organic electrolyte systems, such as Li/Na/K-ion batteries. Our iterative design of polymer fabric cathode has laid the foundation for the development of advanced OEMs to promote the performance of metal-ion batteries.

DOI: 10.1016/j.scib.2024.08.010

Source: https://www.sciencedirect.com/science/article/abs/pii/S2095927324005723