水热制备不同形貌磷酸铁锂国内研究进展

Domestic research progress on different morphologies of lithium iron phosphate via hydrothermal method

LiFePO_4由于安全性能好、热效率低、循环性好、绿色环保、成本低等优点,成为锂离子动力电池最具潜力的正极材料。目前。通过不断优化制备工艺来调控材料的粒度与形貌,获得具有高性能的电极材料已成为LiFePO_4正极材料的研究热点,其中,溶剂极性、溶液浓度、配体种类、pH值、反应温度和反应时间都是影响产物组成、结构、颗粒大小和形貌的主要因素。综述了球形、棒状和片状等不同形貌的LiFePO_4材料的水热制备工艺及国内研究进展,并分析了各种工艺参数对材料形貌和电化学性能的影响。

Olivine-structured LiFePO4, a relatievely new positive material for lithium battery, was considered to be one of the best suitable positive materials for its properties of high safety, favorable thermostability, excellent cyclability, environmental friendly as well as low cost. Currently, obtain high performance anode materials were the research hotspot of LiFePO4 battery anode materials, by continuous optimizing material＇s preparation technics to adjust particle size and morphology. The polarity of the solvent, concentration, ligand, pH value, reaction temperature and time were the main factors influencing the product composition, structure, particle size and morphology. The domestic synthesis progress on different morphologies of LiFePO4 via hydrothermal method, such as, spherical, rod plate and so on were reviewed, and the parameters influencing on the morphology and electrochemical properties of the material were analyzed.