Abstract The electrochemical performance of polyaniline (PANI)/copper oxide (CuO) nanocomposites (PCN) for energy storage device applications have been studied by using cyclic voltammetry (CV) and galvanostatic charging-discharging (GCD) techniques. The surface morphology shows substantial changes from granular shape to fine rod like structure with increasing CuO nano concentration. The absorption peak shifted towards higher wavelength (red shift) and optical band gap (Eg) found to be decreases from 2.86 eV to 2.59 eV of PANI and PCN2 nanocomposite respectively. The CV result shows improvement in the specific capacitance PANI is 294 F/g and 424 F/g for highest concentration PCN2 nanocomposites and GCD reveals the enhanced cyclic stability up to 4000 cycles. The above results suggested that the PCN plays an important role in enhancing long durable cyclic stability for supercapacitors application.

中文翻译：

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电化学合成聚苯胺/氧化铜纳米复合材料：研究储能装置的光学带隙和电化学性能

摘要 已通过使用循环伏安法 (CV) 和恒电流充放电 (GCD) 技术研究了聚苯胺 (PANI)/氧化铜 (CuO) 纳米复合材料 (PCN) 用于储能设备的电化学性能。随着CuO纳米浓度的增加，表面形态显示出从颗粒形状到细棒状结构的显着变化。发现吸收峰移向更高波长（红移）和光学带隙（Eg），发现分别从 PANI 和 PCN2 纳米复合材料的 2.86 eV 降低到 2.59 eV。CV 结果表明，最高浓度 PCN2 纳米复合材料的比电容 PANI 提高了 294 F/g 和 424 F/g，GCD 显示循环稳定性提高了 4000 次。