Low‐Temperature Synthesis of Honeycomb CuP 2 @C in Molten ZnCl 2 Salt for High‐Performance Lithium Ion Batteries
| Autor: | Zhiliang Liu, Piaoping Yang, Shaolei Yang, Bingxue Sun, Jie Zheng, Xingguo Li |
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| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Nanostructure Materials science 010405 organic chemistry Composite number Salt (chemistry) chemistry.chemical_element General Chemistry 010402 general chemistry 01 natural sciences Catalysis 0104 chemical sciences Metal chemistry Nanocrystal Chemical engineering visual_art visual_art.visual_art_medium Honeycomb Lithium Molten salt |
| Zdroj: | Angewandte Chemie International Edition. 59:1975-1979 |
| ISSN: | 1521-3773 1433-7851 |
| DOI: | 10.1002/anie.201910474 |
| Popis: | Phosphorus-rich metal phosphides have very high lithium storage capacities, but they are difficult to prepare. A low-temperature phosphorization method based on Mg reducing PCl3 in ZnCl2 molten salt at 300 °C is developed to synthesize phosphorus-rich CuP2 @C from a Cu-MOF derived Cu@C composite. Abnormal oxidation of Cu by Zn2+ in the molten salt is observed, which leads to the porous honeycomb nanostructure and homogeneously distributed ultrafine CuP2 nanocrystals. The honeycomb CuP2 @C exhibits excellent lithium storage performance with high reversible capacity (1146 mAh g-1 at 0.2 A g-1 ) and superior cycling stability (720 mAh g-1 after 600 cycles at 1.0 A g-1 ), showing the promising application of P-rich metal phosphides in lithium ion batteries. |
| Databáze: | OpenAIRE |
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