Proton solvent-controllable synthesis of manganese oxalate anode material for lithium-ion batteries
| Autor: | Ya-Nan Zhang, Jing Su, Hong-Xiang Kuai, Yanxuan Wen, Yun-Fei Long, Shu-Shu Li, Xiao-Yan Lv |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
General Chemical Engineering chemistry.chemical_element 02 engineering and technology General Chemistry Manganese 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Oxalate 0104 chemical sciences Anode Crystallinity chemistry.chemical_compound chemistry Chemical engineering Nanorod Lithium 0210 nano-technology Mesoporous material |
| Zdroj: | RSC advances. 11(38) |
| ISSN: | 2046-2069 |
| Popis: | Manganese oxalates with different structures and morphologies were prepared by the precipitation method in a mixture of dimethyl sulfoxide (DMSO) and proton solvents. The proton solvents play a key role in determining the structures and morphologies of manganese oxalate. Monoclinic MnC2O4·2H2O microrods are prepared in H2O-DMSO, while MnC2O4·H2O nanorods and nanosheets with low crystallinity are synthesized in ethylene glycol-DMSO and ethanol-DMSO, respectively. The corresponding dehydrated products are mesoporous MnC2O4 microrods, nanorods, and nanosheets, respectively. When used as anode material for Li-ion batteries, mesoporous MnC2O4 microrods, nanorods, and nanosheets deliver a capacity of 800, 838, and 548 mA h g−1 after 120 cycles at 8C, respectively. Even when charged/discharged at 20C, mesoporous MnC2O4 nanorods still provide a reversible capacity of 647 mA h g−1 after 600 cycles, exhibiting better rater performance and cycling stability. The electrochemical performance is greatly influenced by the synergistic effect of surface area, morphology, and size. Therefore, the mesoporous MnC2O4 nanorods are a promising anode material for Li-ion batteries due to their good cycle stability and rate performance. |
| Databáze: | OpenAIRE |
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