Anode/Cathode Dual‐Purpose Aluminum Current Collectors for Aqueous Zinc‐Ion Batteries
Anode/Cathode Dual‐Purpose Aluminum Current Collectors for Aqueous Zinc‐Ion Batteries
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DOI：
10.1002/adfm.202211274
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发表时间：
2022-12
影响因子：
19
通讯作者：
Ruijie Zhu;Zetao Xiong;Han Yang;Ning Wang;Sho Kitano;Chunyu Zhu;Y. Aoki;H. Habazaki
中科院分区：
文献类型：
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作者：
Ruijie Zhu;Zetao Xiong;Han Yang;Ning Wang;Sho Kitano;Chunyu Zhu;Y. Aoki;H. Habazaki
可充电水性锌（Zn）离子电池（RAZIB）使用不易燃的水性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的发展方面显示出巨大的潜力。采用轻质且廉价的铝（Al）作为集流体似乎是一个美好的愿景，但Al在水性电解质中表现出易腐蚀的性质和高阻抗，这使得在RAZIB中实现Al集流体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）涂层的铝（Al-Nb）箔，该箔在水溶液中表现出优异的耐腐蚀性，同时保持了令人满意的电子电导率。此外，Al-Nb箔可用于阳极和阴极集流体，即使在满足实际应用需求的条件下进行测试，也表现出高库伦效率和良好的循环稳定性，例如，Zn||Al-Nb半电池在25 mA cm−2的电流密度和6.25 mAh的镀锌容量下，在320次循环中表现出平均库伦效率为99.17%厘米−2。改性铝集流体的优越性能可能标志着高能量密度水系电池的发展迈出了重要一步。
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.