Homogeneous precipitation synthesis of porous LiMn2O4 with enhanced electrochemical performance
| Autor: | Fanfei Zeng, Shihang Dai, Jian Zhang, Zhongcai Shao, Xuetian Li |
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| Rok vydání: | 2021 |
| Předmět: |
Work (thermodynamics)
Materials science Precipitation (chemistry) General Chemical Engineering General Engineering General Physics and Astronomy Electrochemistry chemistry.chemical_compound Ammonium bicarbonate chemistry Pulmonary surfactant Chemical engineering Copolymer General Materials Science Particle size Porosity |
| Zdroj: | Ionics. 27:4233-4240 |
| ISSN: | 1862-0760 0947-7047 |
| DOI: | 10.1007/s11581-021-04196-6 |
| Popis: | The porous spherical LiMn2O4 cathode material was prepared by homogeneous precipitation method, using ammonium bicarbonate as the precipitation agent and polyoxypropylene polyoxyethylene copolymer solution (P123) as the surfactant. Porous spherical LiMn2O4 had a smaller particle size and good dispersibility compared with ordinary LiMn2O4. In addition, the electrochemical performance of porous spherical LiMn2O4 was improved compared with ordinary LiMn2O4. The porous spherical LiMn2O4 reached the initial discharge capacity of 112.5mAh·g−1 at 0.1 C, and the capacity retention rate was 92.5% after 100 cycles. Furthermore, it also exhibited excellent stable performance under high current density. This work shows that the homogeneous precipitation method with P123 as the surfactant is a promising method for preparing LiMn2O4. |
| Databáze: | OpenAIRE |
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