镧掺杂钙锰氧体/聚吡咯复合物的制备、表征及其电化学性能  

Preparation and characterization of La-doped Ca manganese oxide/polypyrrole composites and its electrochemical properties

作　　者：林生岭[1] 曹旭[1] 陈传祥[1] 郭寅丹[1] 储艳文[1] 龙丹[1] 万勇[1] 

机构地区：[1]江苏科技大学材料科学与工程学院,镇江212003

出　　处：《复合材料学报》2010年第3期56-60,共5页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(20704020)

摘　　要：采用甘氨酸-硝酸盐燃烧法和溶液原位复合技术分别制备了镧掺杂钙锰氧体(La1-xCaxMn0.7Co0.3O3,x=1.0,0.9,0.8,0.7,0.6)粉末及其聚吡咯(PPy)相对质量分数为60%和80%的钙锰氧体/聚吡咯复合物微粒La0.3Ca0.7Mn0.7Co0.3O3/PPy。借助FTIR、XRD、SEM和电化学测试等分析手段表征了钙锰氧体粉末及其复合材料的结构、形貌和电化学性能。结果表明,复合材料中包覆的聚吡咯外层和复合氧化物之间存在相互作用,PPy减少了纳米颗粒的团聚现象,La0.3Ca0.7Mn0.7Co0.3O3和La0.3Ca0.7Mn0.7Co0.3O3/PPy的粒径分别为46.2 nm和43.5 nm,并且复合物的氧化还原峰电流随吡咯含量的增加而变大。La-doped Ca manganese oxide powders（La1-xCaxMn0.7Co0.3O3,x=1.0,0.9,0.8,0.7,0.6） and their polypyrrole composites La0.3Ca0.7Mn0.7Co0.3O3/PPy with 60% and 80% PPy were prepared by a glycine-nitrate combustion method and an as-polymerization method,respectively.The structure,morphologies and electrochemical properties of the samples were characterized by means of Fourier transform infrared（FTIR） spectrometer,powder X-ray diffractometer（XRD）,scanning electron microscope（SEM） and electrochemical tests.The results indicate that interactions exist between polypyrrole and complex oxide.Furthermore,PPy reduces the reunion of the nano-particles,i.e.the particle sizes of La0.3Ca0.7Mn0.7Co0.3O3 and La0.3Ca0.7Mn0.7Co0.3O3/PPy are 46.2 nm and 43.5 nm,respectively.The composite redox peak current becomes larger with increasing of pyrrole contents.

关 键 词：聚吡咯 钙钛矿 复合材料 掺杂 

分 类 号：O69[理学—化学]