青岛科技大学主页平台管理系统李镇江--中文主页-- Amorphous nickel sulfide nanoparticles anchored on N-doped graphene nanotubes with superior properties for high-performance supercapacitors and efficient oxygen evolution reaction

李镇江

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能源材料与器件（二次电池、超级电容器）；（光）电催化材料；生物传感器；吸波材料；新型功能纳米材料的制备、性能与应用等。

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Amorphous nickel sulfide nanoparticles anchored on N-doped graphene nanotubes with superior properties for high-performance supercapacitors and efficient oxygen evolution reaction

发布时间：2021-03-15
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关键字：Oxygen evolution reaction;Doping (additives) - Electrocatalysts - Electrochemical deposition - Electrochemical electrodes - Energy storage - Graphene - Nanoparticles - Nanotubes - Nickel compounds - Oxygen - Potassium hydroxide - Reduction - Sulfur compounds - Supercapacitor - Synthesis (chemical)
摘要：The rational design of a novel material system with superior properties of energy storage and conversion is a significant work. In this paper, amorphous nickel sulfide nanoparticles anchored on N-doped graphene nanotubes (N-GNTs@NSNs) were firstly synthesized by a facile electrochemical-deposition method, which can serve as free-standing robust supercapacitor electrode materials and electrocatalysts. Stemming from the disordered structure of amorphous active materials and the synergy of novel N-GNT framework materials, the as-prepared N-GNT@NSN electrode unveils prominent capacitive behaviors, including a large specific capacity of 240 mA h g-1 (2160 F g-1), decent rate capability, and outstanding cycling stability (95.8% of capacity retention after 12000 cycles). An asymmetric supercapacitor with N-GNTs@NSNs as the positive electrode and active carbon (AC) as the negative electrode is further assembled, which shows a maximum energy density of 49.5 W h kg-1 at a power density of 800 W kg-1 and robust stability (96.6% capacity retention after 12000 cycles). Moreover, the electrode also possesses high activities in the oxygen evolution reaction (OER), namely it can attain a current density of 10 mA cm-2 at an overpotential of 284 mV in 1 M KOH. This finding is not only important for significantly enhancing the electrochemical performances of supercapacitor electrode materials and electrocatalysts, but also lays the solid foundation for their further industrial applications in energy storage and conversion systems. © 2020 The Royal Society of Chemistry.
卷号：12
期号：7
是否译文：否