【作者】 王志涛；

【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】 超铁电池自上世纪九十年代末问世以来,即以其高电压、高能量、无污染等优点成为了电池领域的研究热点,被认为是电池技术的革命性成果。近年来,对超铁电池的研究工作取得了很大的进展,但距其工业化生产还有很多工作要做,如超铁电池阴极材料高铁酸盐的合成过程复杂,成本过高;个别高铁酸盐电极在碱性电池中的稳定性较差,存在自放电分解现象,从而导致电池放电效率较低等。 本论文综述了电池研究的进程和发展趋势,并在国内外已有的研究基础上,从材料研究出发,对超铁电池阴极初级材料—K₂FeO₄ 的制备以及 K₂FeO₄ 基阴极材料的物理化学调制改性对 Zn/K₂FeO₄ 超铁电池性能的影响等方面进行了较为系统的研究。 本论文采用改进的次氯酸盐氧化法,以工业级的原料合成超铁电池阴极初级材料—K₂FeO₄,其纯度可达 98%、收率在 80%以上;利用亚铬酸盐氧化滴定法、分光光度法分析高铁酸钾的纯度,并借助原子吸收分光光度仪（AAS）、X-射线衍射仪（XRD）对高铁酸钾的结构特性进行研究和表征。结果表明,实验所合成的高铁酸钾纯度高,结晶性好。 从导电剂、电解液以及添加剂等几个方面着手,对 K₂FeO₄基超铁电池阴极材料进行物理和化学调制改性,并组装 AAA 型 Zn/K₂FeO₄超铁电池,研究其放电性能,得出阴极材料调制改性后的 AAA 型Zn/K₂FeO₄ 超铁电池的实际放电电位更高、更平坦,阴极活性物质的利用率有所提高,其中最大放电比容量可达 364mAh/g,放电效率达到 89%。更多还原

【Abstract】 Super-iron battery has become a new focus and been regarded as a revolutionary achievement in the research field of battery because of its high energy and no pollution since the end of the 1990s last century. Although the research work of super-iron battery has great improvement in recent years, there is still many work need to do before its industrialization producing such as the high cost of ferrate as the cathode materials because of its complex synthesis and the lower use ratio because of the bad stability and decompose of ferrate in the process of discharge. This paper provides a systematical research about the synthesis of potassium ferrate and the effect on the discharge performances of Zn/K₂FeO₄ super-iron battery as the modification of cathode materials basing on the research about super-iron battery in the world . In the experiment, we adopte a improved method of preparation of potassium ferrate by hypochlorite oxidation. The experimental results demonstrate that 98% purity and 80% yield of potassium ferrate can be achieved by raw materials. The characterization of potassium ferrate is presented by chemical analysis （chromite）, UV, XRD. The results show high purity and perfect crystallation of K2FeO4 . The paper studies on the discharge performances of Zn/K₂FeO₄ super-iron battery in AAA cell configuration using the modified K2FeO4 as cathode active materials through its various electric materials, concentration of electrolyte and additive. At last, we conclude that the super-iron battery with the modified K₂FeO₄ as cathode active materials has higher voltage and use ratio. The maximum of specifie capacity of Zn-K₂FeO₄ battery in AAA cell configuration is 364mAh/g and discharge efficiency is 89%.更多还原