共沉淀法纳米晶LiFePO_4/C包覆粉末的合成研究  

Synthesis of Nano-sized LiFePO_4/C Coated Powder by Chemical Co-Precipitation Method

作　　者：吴怡芳[1] 马小波[1] 李成山[1] 柳永宁[2] 奚正平[1] 

机构地区：[1]西北有色金属研究院,陕西西安710016 [2]西安交通大学,陕西西安710049

出　　处：《稀有金属材料与工程》2011年第S2期596-598,共3页Rare Metal Materials and Engineering

基　　金：陕西省自然科学基金(SJ08ZT04-1)

摘　　要：采用化学还原共沉淀法制备了LiFePO4前驱粉末。用葡萄糖溶液包覆LiFePO4前驱粉末,在合适的热处理温度下,葡萄糖热解获得纳米晶LiFePO4/C包覆粉末。用XRD,SEM,HRTEM对样品进行了分析。结果表明,LiFePO4前驱粉末由非晶构成,粉末细小且分散均匀。LiFePO4/C包覆粉末的晶粒尺寸为20~50nm,LiFePO4表面包覆的非晶碳层的厚度约为2nm。The precursor powder of LiFePO4 was prepared by a chemical co-precipitation method. The precursor powder of LiFePO4 was covered by a glucose solution. Nano-sized LiFePO4 /C coated powder were achieved by suitable heat-treatment through a method of glucose decomposition. The samples were analyzed by XRD, SEM and HRTEM. Results show that the precursor powder mainly consist of amorphous phases. The precursor powder is fine and uniformly dispersed. The particle size of LiFePO4/C powder is about 20~50nm. The LiFePO4 grains are covered by an amorphous C layer with the thickness of about 2nm.

关 键 词：LIFEPO4 纳米晶 共沉淀法 

分 类 号：TB44[一般工业技术]