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首页> 外文期刊>Journal of Energy Storage >Binder free high performance hybrid supercapacitor device based on nickel ferrite nanoparticles
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Binder free high performance hybrid supercapacitor device based on nickel ferrite nanoparticles

机译：基于镍铁氧体纳米粒子的粘合剂自由高性能混合超级电容器装置

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摘要

In this study, we present the actual electrochemical performance of a highly stable hybrid supercapacitor device based on faradic type binder free nickel ferrite (NiFe2O4) positive electrode and activated carbon negative electrode. NiFe2O4 nanoparticles are directly grown over the Ni-foam and stainless steel substrates by a scalable and novel surfactant assisted co-precipitation technique. The structural and morphological properties of the NiFe2O4 nanoparticles are investigated by using different characterization techniques. The electrochemical performance is investigated in 6 M aqueous KOH electrolyte using cyclic voltammetry and galvanostatic charge-discharge techniques. Ni-foam/NiFe2O4 positive electrode exhibits specific capacity of 398 C/g at 1 A/g current density which is much higher than the stainless steel /NiFe2O4 positive electrodes and can be attributed to the better interfacial bonding between Ni-foam and NiFe2O4 nanoparticles and formation of a concomitant 3D porous architecture. A maximum specific energy of 27.71 Wh/kg and specific power of 14.49 kW/kg are achieved at 1 and 20 A/g current density in the hybrid supercapacitor device fabricated utilizing the Ni-foam/ NiFe2O4 positive and activated carbon negetive electrodes. Moreover, the device shows similar to 98% retention of its specific capacity after 6500 cycles at 5 A/g current density which reveals superiority of NiFe2O4 as an electrode material for supercapacitor application.
机译：在这项研究中，我们介绍了基于法拉型粘合剂游离镍铁氧体（NiFe2O4）正极和活性炭负极的高度稳定的混合超级电容器装置的实际电化学性能。 NiFe2O4纳米颗粒通过可伸缩和新的表面活性剂辅助共沉淀技术直接在Ni-Foam和不锈钢基板上生长。采用不同的表征技术研究了NiFe2O4纳米颗粒的结构和形态学性质。使用循环伏安法和电镀电荷 - 放电技术在6M水溶液中研究了电化学性能。 Ni-FoAM / NiFe2O4正极在1 A / G电流密度下表现出398℃/ g的特定容量，高于不锈钢/ NiFe2O4正电极，并且可以归因于Ni-泡沫和NiFe2O4纳米颗粒之间的更好的界面键合并形成伴随的3D多孔建筑。在利用Ni-Faam / NiFe2O4阳性和活性炭内部电极制造的混合超级电容器装置中，在1和20 A / G电流密度下实现27.71WH / kg和特定功率为14.49kW / kg的最大特定能量。此外，该器件显示出6500次循环在5A / g电流密度的6500次循环后的特定容量的98％，其揭示了NiFe2O4作为超级电容器应用的电极材料的优势。

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