Bismuth phosphate: A novel cathode material based on conversion reaction for lithium-ion batteries
| Autor: | Xianyou Wang, Hongbo Shu, Qiliang Wei, Yansong Bai, Benan Hu, Hao Wu, Xiukang Yang, Li Liu, Yunfeng Song |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Conversion reaction
Materials science Precipitation (chemistry) Mechanical Engineering Metals and Alloys chemistry.chemical_element Electrochemistry Ion Metal Chemical engineering chemistry Mechanics of Materials visual_art Phase (matter) Materials Chemistry visual_art.visual_art_medium Lithium Voltage |
| Zdroj: | Journal of Alloys and Compounds. 579:18-26 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2013.05.049 |
| Popis: | Here, we provide a new scientific insight in the field of lithium-ion batteries, in which BiPO 4 is initially reported as a cathode material based on conversion reaction. BiPO 4 exists in three polymorphic phases, which have been synthesized using a room-temperature liquid precipitation route followed by heating treatment. The effects of phase transformation on electrochemical performances of BiPO 4 have been investigated. Herein the hexagonal BiPO 4 exhibits the best reversibility, rate capability and cycling stability. A conversion reaction has also been proved to occur in BiPO 4 with reduction of BiPO 4 into a metallic Bi 0 phase and a Li 3 PO 4 phase upon lithiation, and the reformation of BiPO 4 phase during next charge process. Its theoretical specific capacity and theoretical output voltage are 264.5 mA h g −1 and ∼3.14 V, respectively. Especially, its theoretical volumetric energy density is as high as 5253.1 Wh L −1 , close to twice higher than LiCoO 2 . Therefore, it is still worthy of further study for lithium-ion batteries. |
| Databáze: | OpenAIRE |
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