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首页> 外文期刊>Nanotechnology >High performance asymmetric supercapacitor based on vertical nanowire arrays of a novel Ni@Co-Fe LDH core@shell as negative and Ni(OH)(2) as positive electrode
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High performance asymmetric supercapacitor based on vertical nanowire arrays of a novel Ni@Co-Fe LDH core@shell as negative and Ni(OH)(2) as positive electrode

机译：基于新型Ni @ Co-Fe LDH核心的垂直纳米线阵列的高性能不对称超级电容器作为负极和Ni（OH）（2）作为正电极

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摘要

An efficient synthesis of the electrode material with abundant active sites is imperative for obtaining a flexible supercapacitor with excellent electrochemical performance. Herein, a novel flexible Ni@Co-Fe LDH core-shell nanowires supercapacitor negative electrode is synthesized using polycarbonate membrane on a copper substrate via an electrochemical deposition technique. The synthesized battery-type negative electrode exhibits remarkable specific capacitance of 1289 F g(-1) at 1 A g(-1) and excellent cycling stability with 76.66% capacitive retention after 5000 cycles. Furthermore, the Ni(OH)(2)//Ni@Co-Fe LDH nanowires based asymmetric supercapacitor exhibits excellent cycling stability of 90.49% after 1000 cycles with a highest energy density of 68 Wh kg(-1) at 0.38 KW kg(-1), and a good energy density of 31.8 Wh kg(-1) is still attained at a high power density of 6 KW kg(-1). For practical demonstration, a white LED of 3.3 V is lit by using two asymmetrical supercapacitor devices connected in series. The device offers a favorable and effective pathway for advanced energy storage.
机译：具有丰富活性位点的电极材料的有效合成对于获得具有优异电化学性能的柔性超级电容器是必不可少的。在此，使用电化学沉积技术在铜基板上使用聚碳酸酯膜合成新型柔性Ni @ Co-Fe LDH核 - 壳含量负极。合成的电池型负极在1Ag（-1）下表现出1289fg（-1）的显着比电容，并且在5000次循环后具有优异的循环稳定性，具有76.66％的电容保留。此外，基于Ni（OH）（2）// Ni @ Co-Fe LDH纳米线的不对称超级电容器在1000个循环后的最高能量密度为0.38kg kg（ -1），并且良好的能量密度为31.8WHKG（-1）仍以6kW kg（-1）的高功率密度达到。对于实际演示，3.3 V的白色LED通过使用串联连接的两个不对称的超级电容器装置点亮。该器件为先进的储能提供了有利且有效的途径。

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