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首页> 外文期刊>International Journal of Electrochemical Science >Synthesis, Characterization and Electrochemical Performance of Cobalt Oxides for Supercapacitor
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Synthesis, Characterization and Electrochemical Performance of Cobalt Oxides for Supercapacitor

机译：超级电容器用氧化钴的合成，表征及电化学性能

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Cobalt oxides were prepared by calcinating the precursor which precipitated from Co(NO3)2?6H2O at + pH=10.08, 9.90, 9.75, 9.64 NH3-NH4 buffer solution. XRD, XPS and SEM analysis proved that all of the samples were Co3O4 and CoO mixing with honeycomb-like morphology. High buffer pH acted as conducive solution when Co (Ⅱ) convert to Co (Ⅲ). Electrochemical performance test indicated that the high Co (Ⅲ) content is excellent for the electrochemical performance. But when the pH of the buffer is high, it is not conducive to the uniform distribution of sample particles, which can affect its electrochemical performance. So at the buffer pH 9.90, a higher Co (Ⅲ) with excellent uniform degree cobalt oxides was obtained and exhibited best electrochemical performance. And when the current density of 1 A?g-1, the specific capacitance up to 726 F?g-1.
机译：通过在+ pH = 10.08、9.90、9.75、9.64 NH3-NH4缓冲溶液中煅烧从Co（NO3）2→6H2O沉淀的前体来制备氧化钴。 XRD，XPS和SEM分析证明，所有样品均为Co3O4和CoO混合，呈蜂窝状。当Co（Ⅱ）转化为Co（Ⅲ）时，高缓冲液pH值是有利的溶液。电化学性能测试表明，高Co（Ⅲ）含量具有优异的电化学性能。但是，当缓冲液的pH值很高时，不利于样品颗粒的均匀分布，这会影响其电化学性能。因此，在pH为9.90的缓冲液中，得到了具有优异均匀度的钴氧化物的较高的Co（Ⅲ），并表现出最佳的电化学性能。并且当电流密度为1 A？g-1时，比电容可达726 F？g-1。

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