期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 25, 期 4, 页码 1121-1129出版社
SPRINGER
DOI: 10.1007/s10008-020-04879-6
关键词
Supercapacitors; Electrochemical properties; Perovskite oxide; SrMnO3; Size dependence
资金
- Korea Basic Institute (National Research facilities and Equipment Center) - Ministry of Education [2020R1A6C103A050]
- Research Network NANOTEC (RNN) program of the National Nanotechnology Center (NANOTEC), NSTDA, Ministry of Higher Education, Science, Research and Innovation (MHESI), Thailand
- Office of Naval Research Global [N62909-18-1-2018]
- National Research Foundation of Korea [2020R1A6C103A050] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The study found that preparing SrMnO3 oxide particles through solid-state reaction followed by size reduction using high-energy ball milling can significantly enhance the electrochemical properties of supercapacitor electrodes. After successive cycles, the specific capacitance of micro-sized SrMnO3 increased by approximately 500%, while that of nano-sized SrMnO3 remained almost unchanged, providing a simple and effective technique for high-performance supercapacitor electrodes.
In this letter, we report on the simple process of preparing perovskite oxide SrMnO3 and the studying of the size effect on electrochemical properties for high-performance supercapacitor electrode. The high-crystalline micro-sized and nano-sized perovskite oxide SrMnO3 particles were successfully synthesized by a simple solid-state reaction, followed by a simple size reduction using high-energy ball milling. The electrochemical properties of the SrMnO3 had intriguing results on both sizes of particle, especially when comparing between before and after cycles. After a size reduction, the specific capacitance of the particles increased approximately twofold. Interestingly, the micro-sized SrMnO3 gained similar to 500% its initial specific capacitance after 3000 successive cycles due to electrochemical nano-feature activation and oxygen-vacancy production, while the specific capacitance for the nano-sized SrMnO3 remained almost unchanged. Our work suggested a cost-effective and simple technique for high-performance perovskite-based supercapacitor electrodes by achieving the desired performance.
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