Abstract In this work, nickel phosphate nanowires are synthesized onto Ni foam via a facile and low-cost hydrothermal method. The scanning electron microscopy images exhibit that nanowire morphology with uniform diameter distribution is evenly grown on the Ni foam surface and notably, no other morphology is observed during the nanowire growth. When the obtained NiHPO4 nanowires are used as the cathode, it exhibits high specific capacitance of 1472 F g−1 at of 1 A g−1 in supercapacitor. Further, the NiHPO4 nanowires electrode is also used as anode to assemble an asymmetric cell, in which activated carbon acts as cathode. High specific capacitance of 98.62 F g−1 is obtained at 0.5 A g−1. These results demonstrate that NiHPO4 nanowires display great potential for using as highly active electrode materials for electrochemical energy storage applications.

中文翻译：

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磷酸镍纳米线直接生长在泡沫镍上作为赝电容器的无粘合剂电极

摘要 在这项工作中，磷酸镍纳米线通过一种简便、低成本的水热法合成到泡沫镍上。扫描电子显微镜图像表明，具有均匀直径分布的纳米线形态均匀地生长在泡沫镍表面，值得注意的是，在纳米线生长过程中没有观察到其他形态。当获得的 NiHPO4 纳米线用作阴极时，它在超级电容器 1 A g-1 下表现出 1472 F g-1 的高比电容。此外，NiHPO4 纳米线电极还用作阳极以组装不对称电池，其中活性炭充当阴极。在 0.5 A g-1 下获得 98.62 F g-1 的高比电容。