Co掺杂La0.7Sr0.3MnO3的制备及其电化学性能的研究
Research on Preparation and the Electrochemical Properties of Co-doped La0.7Sr0.3MnO3
甄海妮 1吕静波1
作者信息
- 1. 黑龙江科技大学 理学院,黑龙江 哈尔滨
- 折叠
摘要
采用溶胶-凝胶法制备了Co掺杂的La0.7Sr0.3Mn1-xCoxO3 钙钛矿氧化物(LSMC),利用X射线衍射(XRD)、扫描电子显微镜(SEM)对样品的微观形貌结构进行表征,并通过循环伏安、电化学阻抗谱和恒流充放电测试详细研究了Co掺杂对电化学性能的影响.研究表明,随着Co掺杂浓度的增加,LSMC电极材料的比容量呈现先增大后减小的趋势,其中LSMC55 表现出最高的比容量.在 1 mol L-1 的Na2SO4 电解液中,扫描速率为 2 mV s-1 时,LSMC55 电极的比容量为 150 F g-1.结果表明,对La0.7Sr0.3MnO3(LSM)的B位进行Co掺杂,可以改善LSM的电化学性能.
Abstract
Co-doped La0.7Sr0.3Mn1-xCoxO3 perovskite oxide(LSMC)was prepared by sol-gel method.The microscopic morphology and structure of the samples were characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM).The effect of Co doping on electrochemical properties were studied in detail by cyclic voltammetry,electrochemical impedance spectroscopy and constant current charge/discharge testing.The research shows that the specific capacity of LSMC electrode materials increases first and then decreases with the increase of Co doping concentration,and LSMC55 shows the highest specific capacity.The specific capacity of the LSMC55 electrode was 150 F g-1 at a scan rate of 2 mV s-1 in 1 mol L-1 of Na2SO4 electrolyte.The results show that Co-doping at the B position of La0.7Sr0.3MnO3 can improve the electrochemical performance of LSM.
关键词
超级电容器/钙钛矿氧化物/La0.7Sr0.3Mn1-xCoxO3/掺杂/电化学性能Key words
supercapacitors/perovskite oxides/La0.7Sr0.3Mn1-xCoxO3/doping/electrochemical properties引用本文复制引用
出版年
2024
NETL
NSTL
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