摘要
用高温固相法制备了BaFe2O4。采用扫描电子显微镜(SEM)及X射线衍射仪(XRD)对产物的表面形态和结构进行了表征;以循环伏安、模拟电池恒电流充放电实验研究了BaFe2O4电极的电化学性能。结果表明,以BaFe2O4为正极充电起始物质,与贮氢合金电极组成二次碱性电池,在1.2V附近有一个平稳的放电平台,具有较好的电化学活性。合成时反应物的比例对产物的结构和电化学性能有明显的影响,在900℃,灼烧10h的条件下,以反应物Fe2O3与Ba(OH)2摩尔比为1:1.5时获得的产物性能较好。
Barium ferrite is prepared by high-temperature solid reaction process in this paper.The structure and morphology of the products are characterized by using X-ray diffraction （XRD）and scanning electronic microscope （SEM）.The electrochemical properties of the barium ferrite electrodes are studied by using cyclic voltammetry and galvanostatic charge-discharge tests.The results show that for the second alkaline battery with BaFe2O4 as the positive material and hydrogen absorbing alloy as the negative material,it has good electrochemical activities and a stable discharge platform at above 1.2V.The reactant ratio has a great effect on the structure and electrochemical properties of the products and the optimal process is as follows：ratio between Fe2O3 and Ba（OH）2 1∶1.5,temperature 900℃ and reaction time 10h.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2010年第4期641-643,共3页
Journal of Functional Materials
基金
河南省教育厅科技攻关资助项目(2009A530006)
关键词
铁电池
正极材料
电化学性能
BaFe2O4
iron battery
positive material
electrochemical property
barium ferrite
