Highly porous nickel cobaltite film composed of nanosheets with attached nanowires as an electrode material for electrochemical capacitors

作者：Zheng Zhi Bin; Chan Der Sheng; Wu Mao Sung^*

来源：Materials Letters, 2016, 169: 46-49.

DOI：10.1016/j.matlet.2016.01.066

• Porous materials
• Nanocompo sites
• Energy storage
• Electrochemical capacitors

Nickel cobaltite hetero-nanostructure with superior capacitive behavior is grown on stainless steel mesh by one-pot hydrothermal synthesis at slow cooling rate. Porous nickel cobaltite film composed of nanosheets with attached nanowires (NS-NW) provides numerous pore channels for fast transport of electrolyte, large surface area for reversible Faradaic reaction, and short diffusion pathways in solid phase. The specific capacitance of NS-NW reaches 775 F g(-1) at 5 A g(-1), which is higher than that of nanosheet (435 F g(-1)). Porous film with nanosheet and nanowire configuration exhibits low charge transfer resistance, diffusive impedance, and volumetric strain, leading to high specific capacitance, rate performance, and cycle-life stability.

• 出版日期2016-4-15