Copper-doped manganese tetroxide composites with excellent electrochemical performance for aqueous zinc-ion batteries
| Autor: | Manman Ren, Zi-Rui Wang, Fangong Kong, Dong Li, Song-Hao Li, Qing-Li Gao, Weiliang Liu, Yong-Mei Xia, Shoujuan Wang |
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| Rok vydání: | 2021 |
| Předmět: |
General Chemical Engineering
chemistry.chemical_element 02 engineering and technology Manganese Zinc 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Copper 0104 chemical sciences Analytical Chemistry Metal chemistry visual_art Electrode visual_art.visual_art_medium Ionic conductivity Composite material 0210 nano-technology Faraday efficiency |
| Zdroj: | Journal of Electroanalytical Chemistry. 888:115214 |
| ISSN: | 1572-6657 |
| DOI: | 10.1016/j.jelechem.2021.115214 |
| Popis: | A copper-doped manganese tetroxide (Cu-Mn3O4) composites were prepared for zinc-ion batteries cathode material through a facile synthesis route. The Cu-Mn3O4 is constructed by numerous irregular nanoparticles with a porous micro/nano structure. The Microscopic observation reveals that the Cu2+ embedded in the lattice of manganese oxide by partly substituting Mn3+. Strikingly, at current densities of 100 mA g−1, the Cu-Mn3O4 electrode delivered a higher discharge capacity of 250 mAh g−1 compared with 150 mAh g−1 for the pure Mn3O4 electrode and the coulombic efficiency is almost 100%. The great enhancement of the electrochemical zinc storage performance can be attributed to the improvement of the electronic/ionic conductivity and zinc diffusivity of electrodes. The present results evidence that metal doping can improve the electronic/ionic conductivity of Mn3O4, which may also applicable to other metal oxides. |
| Databáze: | OpenAIRE |
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