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本文首次研究了碳纳米管-MmNi3.6Co0.7Al0.3Mn0.4复合储氢材料的制备及其电化学性能,在250mA/g放电的条件下,其电化学储氢量达到320mAh/g,相同条件下MmNi3.6Co0.7Al0.3Mn0.4储氢量为270mAh/g.通过循环伏安法研究氢在复合电极上电化学特性表明,碳纳米管与MmNi3.6Co0.7Al0.3Mn0.4的复合促进了氢的吸附. 相似文献
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含镓、锡的铝合金在碱性溶液中的阳极行为 总被引:4,自引:0,他引:4
铝的电极电位负,为一1.66V(VS.SHE),电化当量高(298Ah/g)是一种理想的阳板材料.但是由于铝在空气和水中表面形成一层致密的氧化膜,使其在中性溶液中处于钝化状态.而在酸性或碱性溶液中铝表面氧化膜就会被溶解破坏,与水直接反应,腐蚀中途难以中止.这一直是影响铝作为阳板材料应用和深入研究的障碍,特别是对铝阳极活化溶解机理的研究进展缓慢.虽然目前人们在铝中添加Ga、In、11、Zn、Sn、Mg、Hg等元素,研制出各种铝合金阳极,提高了铝阳极活化性能,但是这些研究本质上仍属于经验性的.到1983年Despic等人提出了“场… 相似文献
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In this paper, we present the results for the security and the possible attacks on a new symmetric key encryption algorithm based on the ergodicity property of a logistic map. After analysis, we use mathematical induction to prove that the algorithm can be attacked by a chosen plaintext attack successfully and give an example to show how to attack it. According to the cryptanalysis of the original algorithm, we improve the original algorithm, and make a brief cryptanalysis. Compared with the original algorithm, the improved algorithm is able to resist a chosen plaintext attack and retain a considerable number of advantages of the original algorithm such as encryption speed, sensitive dependence on the key, strong anti-attack capability, and so on. 相似文献
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