【作者】 冯进来；

【导师】 王宝辉；

【作者基本信息】 大庆石油学院 ， 化学工程， 2005， 硕士

【摘要】 本文综述了高铁酸盐的研究现状和电池的发展历史,表明了绿色高能超铁电池具有诱人的发展潜力。目前,提高高铁酸钡稳定性、改善以高铁酸钡为阴极材料的超铁电池放电性能为主要研究热点问题。 本文采用改进的次氯酸盐氧化法合成高纯度的 Fe(Ⅵ)化合物起始物——高铁酸钾,再以高铁酸钾为原料合成各种 Ba-Fe(Ⅵ)基阴极材料,并确定了溶剂、温度、时间等工艺参数。在高铁酸钡的合成过程中液相掺杂各种添加剂能够提高 Ba-Fe(Ⅵ)基阴极材料的稳定性和改善它的放电性能;用亚铬酸盐氧化滴定法分析 Fe(Ⅵ)化合物的纯度;借助X-射线衍射仪(XRD)、傅立叶变换红外光谱仪(FTIR)对 Fe(Ⅵ)化合物的结构特性进行表征;借助原子吸收分光光度仪(AAS)分析 Ba-Fe(Ⅵ)基阴极材料中添加剂的含量。实验结果表明: 1.在高铁酸钡的合成过程中经硅化物调制后能够明显地提高高铁酸钡的稳定性,高铁酸钡产品中硅化物的含量为 0.48%时,将样品在室温下密闭保存,其纯度在 60 天后降低了 12.9%; 2.分别采用经过锰化物、硅化物、氯化物调制后的 Ba-Fe(Ⅵ)基阴极材料作为超铁电池阴极的活性物质,明显地改善了电池的放电性能,它们的放电容量与无添加剂的高铁酸钡电池相比,分别提高了4.80%、3.57%和 6.15%,其中锰化物和硅化物混掺具有良好的协同作用; 3.Ba-Fe(VI)基复合材料具有较高的比容量和放电效率,经过氯化物调制后的 Ba-Fe(VI)基复合材料的比容量为 286mAh/g,放电效率为 90.5%;　4.采用膨胀石墨作为超铁电池的导电剂与普通微粉石墨作为导电剂相比,电池的恒阻放电时间和放电性能有较大的改善,放电时间延长了 8.3%,放电容量和放电能量分别提高了 14.5%和 15.5%。 本文研究表明以高铁酸钡为阴极活性物质的碱性超铁电池具有高电压、大容量、廉价、无污染等诸多优势。通过本研究可以大大推进高铁酸盐材料的制备技术和超铁电池工业化生产的步伐。更多还原

【Abstract】 In this paper, recent development of ferrates and the history of batteries were summarized. It indicates that the super-iron batteries have a huge potential. The investigations focus on physical chemical methods of improving the stability and discharge performance of super-iron battery with cathode of barium ferrate. The paper adopted a new method to prepare high purity ferrate salts (potassium ferrate and barium ferrate), and determined the optimizational parameters such as solvent, temperature, time,etc.. Some modified additives can greatly improve the stability and discharge performance of barium ferrate batteries. The chromite method was used to determine the purity of ferrate salts.The structure of ferrates was characterized by XRD and FTIR. The additives in barium ferrate materials were analyzed by AAS. The experimental results show that (1) the addition of silica can greatly improve its stability in the process of synthesizing baruim ferrate, and when the content of silica in the BaFeO4 was 0.48%, its purity was only reduced by 12.9% after 60 days in room temperature. (2)discharge performance of the super-iron battery with barium ferrate was obviously improved if mixed with manganese compound, silica and chloride in the synthesis, yielding over 4.80%,3.57%and 6.15% higher capacity than batteries without the addition, and manganese compound and silica as additives was found to has a cooperating action.(3) Ba-Fe(Ⅵ) composite materials had outstanding specific capacity and discharge efficiency, and after complexed with chloride, its specific capacity was 286mAh/g, and its discharge efficiency was 90.5%.(4) the super-iron battery with expanded graphite as a conductor had higher discharge performance than one with normal graphite, so, its discharge time was prolonged 8.3%, and its discharge capacity and energy was increased 14.5%and 15.5% respectively. The paper exhibits that the alkaline super-iron battery with cathode of barium ferrate has many advantages such as high capacity, low cost, no pollution, etc. The results greatly promote the development of industrial production of ferrate materials and super-iron batteries.更多还原