Guo Quanquan, Li Wei, Li Xiaodong, Zhang Jiaxu, Sabaghi Davood, Zhang Jianjun, Zhang Bowen, Li Dongqi, Du Jingwei, Chu Xingyuan, Chung Sein, Cho Kilwon, Nguyen Nguyen Ngan, Liao Zhongquan, Zhang Zhen, Zhang Xinxing, Schneider Grégory F, Heine Thomas, Yu Minghao, Feng Xinliang
Center for Advancing Electronics Dresden (cfaed) & Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Dresden, Germany.
Max Planck Institute of Microstructure Physics, Halle (Saale), Germany.
Nat Commun. 2024 Mar 8;15(1):2139. doi: 10.1038/s41467-024-46464-9.
The pressing demand for sustainable energy storage solutions has spurred the burgeoning development of aqueous zinc batteries. However, kinetics-sluggish Zn as the dominant charge carriers in cathodes leads to suboptimal charge-storage capacity and durability of aqueous zinc batteries. Here, we discover that an ultrathin two-dimensional polyimine membrane, featured by dual ion-transport nanochannels and rich proton-conduction groups, facilitates rapid and selective proton passing. Subsequently, a distinctive electrochemistry transition shifting from sluggish Zn-dominated to fast-kinetics H-dominated Faradic reactions is achieved for high-mass-loading cathodes by using the polyimine membrane as an interfacial coating. Notably, the NaVO·1.5HO cathode (10 mg cm) with this interfacial coating exhibits an ultrahigh areal capacity of 4.5 mAh cm and a state-of-the-art energy density of 33.8 Wh m, along with apparently enhanced cycling stability. Additionally, we showcase the applicability of the interfacial proton-selective coating to different cathodes and aqueous electrolytes, validating its universality for developing reliable aqueous batteries.
对可持续储能解决方案的迫切需求推动了水系锌电池的蓬勃发展。然而，作为阴极中主要电荷载体的锌动力学缓慢，导致水系锌电池的电荷存储容量和耐久性欠佳。在此，我们发现一种具有双离子传输纳米通道和丰富质子传导基团的超薄二维聚亚胺膜，有助于质子快速且选择性地通过。随后，通过使用聚亚胺膜作为界面涂层，对于高质量负载的阴极实现了从缓慢的锌主导到快速动力学的氢主导的法拉第反应的独特电化学转变。值得注意的是，具有这种界面涂层的NaVO·1.5HO阴极（10 mg cm）展现出4.5 mAh cm的超高面积容量和33.8 Wh m的先进能量密度，以及显著增强的循环稳定性。此外，我们展示了界面质子选择性涂层对不同阴极和水系电解质的适用性，验证了其在开发可靠水系电池方面的通用性。
