Zhang Wenlei, Xu Jianle, Li Gang, Wang Kaiying
Institute of Energy Innovation, College of Materials Science and Engineering & College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China.
Department of Microsystems-IMS, University of South-Eastern Norway, 3184 Horten, Norway.
Materials (Basel). 2022 Feb 21;15(4):1615. doi: 10.3390/ma15041615.
In this work, we report the fabrication and enhanced supercapacitive performance of nitrogen-doped nanoporous stainless steel foils, which have been prepared by electrochemical anodization and subsequent thermal annealing in ammonia atmosphere. The nanoporous oxide layers are grown on type-304 stainless steel foil with optimal thickness ~11.9 μm. The N-doped sample exhibits high average areal capacitance of 321.3 mF·cm at a current density of 1.0 mA·cm, 3.6 times of increment compared with untreated one. Structural and electrochemical characterizations indicate that the significant enhancement is correlated to the high charge transfer efficiency from nitriding nanosheet products FeN. Our report here may provide new insight on the development of high-performance, low-cost and binder-free supercapacitor electrodes for flexible and portable electronic device applications with multiple anions.
在本工作中，我们报道了氮掺杂纳米多孔不锈钢箔的制备及其增强的超级电容性能，该箔通过电化学阳极氧化并随后在氨气氛中进行热退火制备而成。纳米多孔氧化层生长在304型不锈钢箔上，最佳厚度约为11.9μm。氮掺杂样品在电流密度为1.0 mA·cm时表现出321.3 mF·cm的高平均面积电容，与未处理的样品相比增加了3.6倍。结构和电化学表征表明，显著增强与氮化纳米片产物FeN的高电荷转移效率相关。我们在此的报告可能为开发用于具有多种阴离子的柔性和便携式电子设备应用的高性能、低成本且无粘合剂的超级电容器电极提供新的见解。
