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Sea urchin-like Al-doped MnO2 nanowires with excellent cycling stability for supercapacitor

机译:海胆状掺铝MnO 2 纳米线,超级电容器循环稳定性极好

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Homogenous Al-doped MnO 2 supercapacitor materials with excellent electrochemical properties aresynthesized by employing an one-step hydrothermal method in this study. The optimal sample showsmorphologies of sea urchin-like micro-spheres, which consists of uniform nanowires with diameters ofapproximate 30 nm. The Al-doped MnO 2 has enhanced crystallinity and electrical conductivity than thepure MnO 2 , which is beneficial to the supercapacitive performance. The optimal Al-doped MnO 2elctrode material exhibits a high specific capacitance of 101 F?g -1 at a high scan rate of 200 mV?s -1 anda remarkable long-term cycling stability of 99.6% capacitance retention over 20,000 charge/discharge at5 A?g -1 . These results indicate that the sea urchin-like Al-doped MnO 2 nanowires have extensiveapplication prospects in supercapacitors.
机译:本研究采用一步水热法合成了具有优良电化学性能的均质掺铝MnO 2超级电容器材料。最佳样品显示出海胆状微球的形态,其由直径约30 nm的均匀纳米线组成。 Al掺杂的MnO 2比纯MnO 2具有更高的结晶度和电导率,这有利于超电容性能。最佳的Al掺杂MnO 2电极材料在200 mV?s -1的高扫描速率下具有101 F?g -1的高比电容,在20,000次充电/放电时具有显着的长期循环稳定性,电容保持率为99.6%,5 A?g -1。这些结果表明,海胆状掺铝MnO 2纳米线在超级电容器中具有广阔的应用前景。

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