1. Synthesis of LaMnO3-reduced graphene oxide or Sr composite and their application in electrochemical properties
- Author
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Liu Yanyue, Jiao Yuanyuan, Chen Peng, Li Zijiong, and Wang Haiyan
- Subjects
Materials science ,Polymers and Plastics ,Graphene ,Composite number ,Metals and Alloys ,Oxide ,Electrochemistry ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,law.invention ,Biomaterials ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,law ,Sol-gel - Abstract
Perovskite structural metal oxides as electrode materials present promising and potential properties due to excellent storage characteristics. Herein, series of perovskite type LaMnO3 nanopowders were synthesized by the ‘sol-gel’ method with a heat treatment at different temperatures (700 °C–900 °C) for different times. The morphology characterization, structures and electrochemical performances were investigated. The preferable sample for electrochemical energy storage device can be obtained at 900 °C with 2 h annealing. Furthermore, to improve the properties of the electrode materials, the samples were combined and rectified with reduced graphene oxide (rGO) and strontium (Sr), respectively. The results indicate that the rGO/Sr-doped LaMnO3 oxide materials have excellent electrochemical properties. These findings are beneficial for the selection and preparation of electrode materials.
- Published
- 2020