摘要
通过化学共沉淀法分别合成了α、γ、δ三种晶型的MnO2。在对三种晶型的MnO2进行表征之后,将它们作为空气电极催化剂,采用循环伏安(CV)、电化学阻抗谱(EIS)等技术进行电化学性能测试。研究结果表明,在20mA·cm^-2的电流密度下α-MnO2、γ-MnO2和δ-MnO2的放电电压分别为1.59、1.41和1.55V,α-MnO2的放电电压明显高于γ-MnO2、δ-MnO2,说明α-MnO2是一种性能优良的空气电极催化剂。
MnO2 are synthesized by chemical co-precipitation method and characterized.The characterizations show that α,γ,δ-MnO2 were successfully synthesized and the as-prepared samples are wellcrystallized.To investigate the electrochemical performance as the catalyst of an aluminum air battery,the three types of MnO2 were tested on cyclic voltammetry(CV)and electrochemical impedance spectroscopy(EIS),etc.At the current density of 20 mA·cm^-2,the average discharge voltage of α-MnO2,γ-MnO2 and δ-MnO2 were 1.59 V,1.41 V and 1.55 V,respectively,the discharge voltage platform of α-MnO2 was significantly higher than that of γ、δ-MnO2.It is shown that α-MnO2 is an excellent catalyst for air electrode.
作者
冯攀
俞小花
李永刚
俞双林
李荣兴
谢刚
FENG Pan;YU Xiaohua;LI Yonggang;YU Shuanglin;LI Rongxing;XIE Gang(Faculty of Metallurgy and Energy Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China;Kunming Metallurgy Research Institute,Kunming 650031,China;State Key Laboratory of Common Associated Non-ferrous Metal Resources Pressure Hydrometallurgy Technology,Kunming 650500,China)
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2019年第3期368-372,共5页
Journal of Materials Science and Engineering
基金
国家自然科学基金面上资助项目(51774160)
关键词
二氧化锰
晶型
电化学性能
铝空气电池
manganese dioxide
crystal type
electrochemical performance
aluminum-air battery
