LiFePO_4/Ni复合微球的制备  

PREPARATION OF LiFePO_4/Ni COMPOSITE MICROSPHERES

作　　者：韩翀[1] 沈湘黔[1] 周建新[1] 

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《硅酸盐学报》2008年第4期559-564,共6页Journal of The Chinese Ceramic Society

基　　金：江苏省研究生创新计划(JSPIF0731)资助项目

摘　　要：通过控制反应沉淀–焙烧法首先制备了球形LiFePO4粉体,然后在LiFePO4粒子表面包覆柠檬酸镍凝胶,经还原热处理制得LiFePO4/Ni复合微球材料,并采用热重–差热分析、扫描电子显微镜、能谱分析、X射线衍射等手段研究了前驱体和焙烧产物的成分、微观结构、形貌及其热分解过程。结果表明:实验制备的LiFePO4/Ni复合材料由LiFePO4和金属Ni两相组成,保持了球形形貌和多孔结构,金属镍均匀分布于LiFePO4微球表面。LiFePO4 microspheres were firstly synthesized by controllable reaction precipitation-calcination method, and then LiFePO4/Ni composite microspheres were prepared by coating Ni-citrate gels on LiFePO4 microspheres followed by thermal re- duction. The composition, structure and morphology of the precursors and resultant composite powders were characterized by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy elemental mapping, respectively. The ther- mal decomposition processe...

关 键 词：磷酸铁锂/镍复合微球 控制反应沉淀–焙烧法 柠檬酸盐凝胶法 

分 类 号：TB381[一般工业技术—材料科学与工程]