高功率Li/FeS2电池的研制

随着信息技术的快速发展,用电器对电池的需求也日益增长,尤其是对高能量高功率电池的需求,而普通碱性电池显然无法满足这种要求.本文作者在国内率先成功研制了采用改性FeS2作为正极材料的AA型高能量高功率Li/FeS2电池.天然FeS2经过研磨、焙烧和酸洗,可最终制得改性FeS2.讨论了天然及改性FeS2的化学成分、物理性质和结构特征,并分别测试了二者组装成锂电池的放电容量.研究结果发现:FeS2的纯度、颗粒大小是影响Li/FeS2电池电化学性能的重要因素.在此基础上,对比了AA型Li/FeS2电池与同型号碱性电池的放电性能.Li/FeS2电池的整个制备过程完全满足环保的要求.研究表明:Li/FeS2电池是一种绿色、高功率的新型能源,具有广泛的应用前景.

Development of Li/FeS2 Primary Battery for High Power Usage

With the fast development of digital and portable apparatus, the requirement for battery becomes higher than ever, especially for the battery with high power and high-energy. Obviously the common alkaline battery cannot completely satisfy such request. In this paper, Li/FeS2 AA primary batteries for high power and high-energy were successfully developed originally in China within treated FeS2 samples as positive material. Natural FeS2 samples were grinded firstly, then heated in nitrogen and finally washed in acid, thus treated FeS2 samples were prepared. Chemical composition, physical property and structural characterization of natural and treated FeS2 samples were discussed and correlated with their discharge capacities in lithium cells. According to the results of chemical and physical analysis, the purity and grain sizes of FeS2 samples were important factors which affected the electrochemical performance of Li/FeS2 primary batteries. Discharge performances of Li/FeS2 AA primary battery at different current were examined in comparison with LR6 AA battery from Nanfu Company. In addition, the whole process of preparation meets the requests of environmental protection. Anyway, Li/FeS2 primary battery is a green and high-energy power source, and will be used more widely in the future.