Facile Synthesis of A 3D Flower‐Like Mesoporous Ni@C Composite Material for High‐Energy Aqueous Asymmetric Supercapacitors,Chemistry - An Asian Journal

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Facile Synthesis of A 3D Flower‐Like Mesoporous Ni@C Composite Material for High‐Energy Aqueous Asymmetric Supercapacitors
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2018-03-13 , DOI: 10.1002/asia.201800056
Song Liu ₁ , Cuihua An ₂ , Lei Zang ₁ , Xiaoya Chang ₁ , Huinan Guo ₁ , Lifang Jiao ₁ , Yijing Wang _{1,

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Affiliation

A 3D flower‐like mesoporous Ni@C composite material has been synthesized by using a facile and economical one‐pot hydrothermal method. This unique 3D flower‐like Ni@C composite, which exhibited a high surface area (522.4 m² g⁻¹), consisted of highly dispersed Ni nanoparticles on mesoporous carbon flakes. The effect of calcination temperature on the electrochemical performance of the Ni@C composite was systematically investigated. The optimized material (Ni@C 700) displayed high specific capacity (1306 F g⁻¹ at 2 A g⁻¹) and excellent cycling performance (96.7 % retention after 5000 cycles). Furthermore, an asymmetric supercapacitor (ASC) that contained Ni@C 700 as cathode and mesoporous carbon (MC) as anode demonstrated high energy density (60.4 W h kg⁻¹ at a power density of 750 W kg⁻¹).

中文翻译：

用于高能水不对称超级电容器的3D花状介孔Ni @ C复合材料的简便合成

利用一种简便且经济的单罐水热法合成了一种3D花状中孔Ni @ C复合材料。这种独特的3D花状Ni @ C复合材料具有高表面积（522.4 m ² g ^-1），由在介孔碳薄片上高度分散的Ni纳米颗粒组成。系统地研究了煅烧温度对Ni @ C复合材料电化学性能的影响。优化的材料（镍@ C_ 700）显示高的比容量（1306 F G ^-1在2A克^-1）和出色的循环性能（5000次循环后保留率为96.7％）。此外，包含镍@ C_ 700作为阴极和中孔碳（MC）作为阳极的不对称超级电容器（ASC）证明高能量密度（60.4 W时千克^-1在750瓦特kg的功率密度^-1）。

更新日期：2018-03-13

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