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首页> 外文期刊>Journal of Materials Science >Facile synthesis of hollow urchin-like NiCo2O4 microspheres for high-performance sodium-ion batteries
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Facile synthesis of hollow urchin-like NiCo2O4 microspheres for high-performance sodium-ion batteries

机译：高性能钠离子电池中空的顽童状NiCo2O4微球的合成

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Hollow urchin-like NiCo2O4 microspheres were facilely synthesized by a simple hydrothermal approach combined with subsequent annealing process. The three-dimensional architectures with hollow structure are formed by the mechanism of the nanowires self-assembly associate with the subsequent Ostwald ripening process. The as-obtained NiCo2O4 microspheres with the average diameter of about 5 mu m consist of numerous radial nanowires and benefited from the hollow urchin-like microsphere structure, Brunauer-Emmett-Teller results show that it possesses a large specific surface area of 92.8 m(2) g(-1), when it was applied as an electrode material for sodium-ion batteries, the NiCo2O4 electrode displayed a high invertible capacity of similar to 440 mAh g(-1) after 200 cycles at a current density of 100 mA g(-1), and the electrochemical measurement results also indicated the NiCo2O4 electrode possess a charming rate capability. These results suggest a promising application of the hollow urchin-like NiCo2O4 microspheres for the advanced sodium-ion batteries.
机译：通过简单的水热方法并结合随后的退火工艺，轻松合成了空心的顽童状NiCo2O4微球。具有纳米结构的三维结构是由纳米线自组装的机制与随后的奥斯特瓦尔德（Ostwald）成熟过程形成的。所获得的平均直径约5μm的NiCo2O4微球由许多径向纳米线组成，并得益于空心的顽童状微球结构，Brunauer-Emmett-Teller结果表明，它具有92.8 m（的大比表面积）。 2）g（-1），当将其用作钠离子电池的电极材料时，NiCo2O4电极在200次循环后于100 mA的电流密度下表现出类似于440 mAh g（-1）的高可逆容量g（-1），电化学测量结果也表明NiCo2O4电极具有吸引人的速率能力。这些结果表明空心海胆状NiCo2O4微球有望用于先进的钠离子电池。

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