Enhanced electrochemical performance of 3‐D microporous nickel/nickel oxide nanoflakes for application in supercapacitors
Enhanced electrochemical performance of 3‐D microporous nickel/nickel oxide nanoflakes for application in supercapacitors
复制标题
DOI：
10.1002/nano.202200180
复制
发表时间：
2023-01
期刊：
影响因子：
--
通讯作者：
B. Singh;Debabrata Das;N. Attarzadeh;Srija N. Chintalapalle;C. Ramana
中科院分区：
文献类型：
--
作者：
B. Singh;Debabrata Das;N. Attarzadeh;Srija N. Chintalapalle;C. Ramana
日益增长的能源需求、化石燃料的枯竭和环境问题迫使社会选择可再生能源和清洁能源的道路，这促使科学家和工程师开发可持续、可再生和清洁能源。然而，主要的挑战是实施低成本、灵活的方法和材料来满足能量存储和转换技术的要求，特别是涉及电池和超级电容器的技术。在这种背景下，我们在这里展示了一种集成的方法来实现具有增强性能的三维(3D)介孔镍(Ni)/氧化镍(NiO)纳米结构用于超级电容器应用。三维介孔镍上的NiO纳米片共形沉积在廉价的铜衬底上，具有较大的活性表面积，通过介孔通道提供了容易的离子访问，并改善了通过互连的镍网络的电子传输。制备的三维介孔Ni/NiO纳米片具有良好的电化学性能，其面电容为720mFcm−2，能量密度为4mWcmμ−2，功率密度为2.5mWcm−2，循环容量为5 000次。我们相信，这些结果可能提供一个路线图，进一步调整条件，以便设计氧化物结构，以获得实际应用中增强的超级电容器设备的能量性能。
Increasing energy demands, depletion of fossil fuels, and environmental issues have impelled society to choose the pathways of renewable and clean energy, which motivated scientists and engineers to develop sustainable, renewable, and clean energy resources. However, the major challenge is the implementation of low‐cost, flexible approaches and materials to fulfill the requirements of energy storage and conversion technologies, specifically those involving batteries and supercapacitors. In this context, herein, we demonstrate an integrated approach to realize three‐dimensional (3‐D) mesoporous nickel(Ni)/nickel oxide (NiO) nanostructures with enhanced performance for supercapacitor applications. Conformal deposition of NiO nanoflakes on 3‐D mesoporous Ni onto inexpensive Cu substrates with large active surface area, providing easy ion accessibility through mesoporous channels and improving electron transport through interconnected nickel network. The 3‐D mesoporous Ni/NiO nanoflakes exhibit excellent electrochemical performance, namely, areal capacitance of 720 mFcm−2, energy density of 4 μWhcm−2and power density of 2.5 mWcm−2and a reasonable capacity retention for 5000 cycles. We believe that these results may provide a roadmap to further tune the conditions so as to engineer oxide architectures to derive enhanced energy performance of supercapacitor devices for practical applications.