Anode/Cathode Dual-Purpose Aluminum Current Collectors for Aqueous Zinc-Ion Batteries,Advanced Functional Materials

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Anode/Cathode Dual-Purpose Aluminum Current Collectors for Aqueous Zinc-Ion Batteries
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2022-12-07 , DOI: 10.1002/adfm.202211274
Ruijie Zhu ₁ , Zetao Xiong ₁ , Huijun Yang ₂ , Ning Wang ₃ , Sho Kitano ₄ , Chunyu Zhu ₅ , Yoshitaka Aoki ₄ , Hiroki Habazaki ₄

Affiliation

Rechargeable aqueous zinc (Zn)-ion batteries (RAZIBs), which use non-flammable aqueous electrolytes and low-cost electrode materials, show great potential to boost the development of safe, cost-effective, and highly efficient energy storage systems. The adoption of lightweight and inexpensive aluminum (Al) as current collectors seems to be a good vision, but Al exhibits an easily-corroded nature and a high impedance in aqueous electrolytes, making it a challenge to realize the utilization of Al current collector in RAZIBs. In this study, through the direct current magnetron sputtering, niobium (Nb) coated Al (Al-Nb) foils are prepared, which shows superior corrosion-resistance in an aqueous solution, while maintaining a satisfying electronic conductivity. Moreover, the Al-Nb foils can be adopted to both anode and cathode current collectors while exhibiting high coulombic efficiency and good cycling stability even when they are tested under a condition that can meet the real-world application demands, e.g., the Zn||Al-Nb half-cell shows an average coulombic efficiency of 99.17% in 320 cycles under a current density of 25 mA cm⁻² and a galvanizing capacity of 6.25 mAh cm⁻². The superior performance of the modified Al current collectors may mark a significant step toward the development of high-energy-density aqueous batteries.

中文翻译：

用于水系锌离子电池的阳极/阴极两用铝集流器

可充电水系锌 (Zn) 离子电池 (RAZIB) 使用不易燃的水系电解质和低成本电极材料，在促进安全、经济高效的储能系统发展方面显示出巨大潜力。采用轻质廉价的铝 (Al) 作为集电器似乎是一个不错的愿景，但铝在水性电解质中表现出易腐蚀的特性和高阻抗，这使得在 RAZIBs 中实现铝集电器的利用成为一个挑战. 在这项研究中，通过直流磁控溅射，制备了铌 (Nb) 涂层铝 (Al-Nb) 箔，它在水溶液中表现出优异的耐腐蚀性，同时保持令人满意的电子导电性。而且，^{-2和6.25 mAh cm}^-2的镀锌容量。改性铝集流体的优越性能可能标志着朝着高能量密度水系电池发展迈出了重要一步。

更新日期：2022-12-07

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