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Two ferrates, K2FeO4 and BaFeO4, had been prepared and characterized by XRD, IR and SEM. The electrochemical tests of the samples were carried out in the voltage range of 0.8~2.0 V and current density of 0.5~3.0 mA·cm-2. The results indicated that performance of Zn-BaFeO4 battery was superior to that of Zn-MnO2 and Zn-K2FeO4 batteries. Nanometer SrTiO3 prepared by Sol-gel methode with different ratio was added to the BaFeO4 cathode in order to improve the discharge performance. The discharge capacity of the BaFeO4 cathode was increased from 224 mAh·g-1 to 246 mAh·g-1 by addition of 5% nanometer SrTiO3. The reason of enhancing BaFeO4 electrochemical performance was discussed. 相似文献
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偏振模色散补偿中偏振度与差分群延时关系的理论分析和实验 总被引:2,自引:1,他引:1
偏振模色散是高速光纤通信系统的主要问题之一。在用偏振度作为反馈信号的动态偏振模色散补偿系统中,偏振度与差分群延时的关系对于准确快速的动态偏振模色散补偿很重要。推导出了准单色光波情况下任意波形和高斯脉冲的偏振度的数学表达式,理论分析了高斯脉冲情况下分光比、脉冲宽度和连续脉冲个数分别对偏振度与差分群延时关系的影响,并用10Gbit/s归零/不归零伪随机码序列进行了实验,实验证明了理论推导和理论分析的正确性。实验还表明偏振度的大小与脉冲啁啾和光纤色散无关,从而肯定了将实际光脉冲化简为准单色光波分析的可行性。 相似文献
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