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摘要
先用溶胶-凝胶法制备出铁酸钡,再把铁酸钡做成电极,经过电解氧化得到高铁酸钡;通过制备模拟电池,研究了不同充放电制度、不同充电时间对高铁酸盐生成的影响;运用循环伏安和交流阻抗等测试方法对高铁酸盐作为正极材料的充放电机理进行了研究;并运用了X射线衍射仪研究了高铁酸盐的晶型结构、纯度等主要性质。结果表明:850℃制备的铁酸盐电极充放电性能较佳,放电容量为44mAh/g,850℃制备的铁酸盐电极循环次数达到1280次,放电容量未出现明显下降,为制备二次高铁电池提供了依据;且高铁酸盐的特征峰较突出,生成效率较好。
Abstract
Barium ferric acid was prepared by sol-gel method.Then barium ferrite was made into an electrode,barium ferrate was obtained by electrolytic oxidation.By prepared simulation battery,the effects of different charging systems and different charging times on the formation of ferrate were studied.The mechanism of charging and discharging of ferric acid as a positive electrode was studied by using cyclic voltammery and ac impedance.XRD was used to study the crystal structure and purity of ferric acid.Experiments showed that the charge-discharge performance of electrode prepared at 850℃ was better,the discharge capacity was 44mAh/g,the cycles of electrode reached 1280 times.The discharge capacity was not decreased significantly,which provided a basis for the preparation of two high iron batteries.It can be seen from XRD results that the characteristic peak of ferrate was prominent and the efficiency was better.
关键词
铁酸盐
/
高铁酸钡
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电解法
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电化学性能
Key words
ferrate
/
barium ferrate
/
electrolytic process
/
electrochemical property
绿色高容量电池材料高铁酸钡的制备及性能研究[J].
化工新型材料, 2019, 47(4): 136-139 DOI:
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基金资助
国家级大学生创新创业训练计划项目(201510397008);武夷学院校科研基金(XL201502);福建省中青年教师教育科研项目(JAT170593)
