Booting the electrochemical properties of Fe-based anode by the formation multiphasic nanocomposite for lithium-ion batteries
| Autor: | Jiangmei Yin, Xijin Xu, Guotao Xiang, Xixi Zhang, Peiyu Hou |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Nanocomposite
Materials science Graphene Oxide chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Redox 0104 chemical sciences Anode law.invention chemistry.chemical_compound chemistry Chemical engineering law Lithium 0210 nano-technology Faraday efficiency |
| Zdroj: | Chinese Chemical Letters. 32:2169-2173 |
| ISSN: | 1001-8417 |
| Popis: | Fe-based compounds with good environmental friendliness and high reversible capacity have attracted considerable attention as anode for lithium-ion batteries. But, similar to other transition metal oxides (TMOs), it is also affected by large volume changes and inferior kinetics during redox reactions, resulting in the destruction of the crystal structure and poor electrochemical performance. Here, Fe3O4/C nanospheres anchored on the two-dimensional graphene oxide as precursors are phosphated and sintered to build the multiphasic nanocomposite. XRD results confirmed the multiphasic nanocomposite composed of Fe2O3, Fe3O4 and Fe3PO7, which will facilitate the Li+ diffusion. And the carbonaceous matrix will buffer the volume changes and enhance electron conduction. Consequently, the multiphasic Fe-based anode delivers a large specific capacity of 1086 mAh/g with a high initial Coulombic efficiency of 87% at 0.1 C. It also has excellent cycling stability and rate property, maintaining a capacity retention of ∼87% after 300 cycles and a high reversible capacity of 632 mAh/g at 10 C. The proposed multiphasic structure offers a new insight into improving the electrochemical properties of TMO-based anodes for advanced alkali-ion batteries. |
| Databáze: | OpenAIRE |
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