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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。
The lanthanum-doped calcium manganese oxide (La1-xCaxMn0.7Co0.3O3, x = 1.0,0.9,0.8,0.7,0.6) powder and its polypyrrole PPy) relative mass fraction of 60% and 80% of calcium manganese oxide / polypyrrole composite particles La0.3Ca0.7Mn0.7Co0.3O3 / PPy. The structure, morphology and electrochemical properties of calcium manganese oxide powders and their composites were characterized by FTIR, XRD, SEM and electrochemical measurements. The results show that there is interaction between the polypyrrole outer coating and the composite oxide coated in the composite material, PPy reduces the agglomeration phenomenon of the nanoparticles, La0.3Ca0.7Mn0.7Co0.3O3 and La0.3Ca0.7Mn0.7Co0. The particle sizes of 3O3 / PPy were 46.2 nm and 43.5 nm, respectively, and the redox peak current of the composite increased with the increase of the content of pyrrole.