Carbon-coated Na4Fe3 (PO4) 2P2O7 and carbon-coated NaVPO4F as well as preparation and application thereof

The invention relates to a preparation method of carbon-coated Na4Fe3 (PO4) 2P2O7 and carbon-coated NaVPO4F and an application of the carbon-coated Na4Fe3 (PO4) 2P2O7 and carbon-coated NaVPO4F in a sodium ion battery. The surface of the sodium ferric phosphate pyrophosphate material is coated with a...

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Bibliographische Detailangaben
Hauptverfasser:	XU SHAOXIA, WANG GUANGJIN, XU RUI, LI XIANFENG, LI MOHENG, ZHENG QIONG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOUNDS THEREOF ELECTRICITY INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	The invention relates to a preparation method of carbon-coated Na4Fe3 (PO4) 2P2O7 and carbon-coated NaVPO4F and an application of the carbon-coated Na4Fe3 (PO4) 2P2O7 and carbon-coated NaVPO4F in a sodium ion battery. The surface of the sodium ferric phosphate pyrophosphate material is coated with a layer of tetragonal sodium vanadium monofluorophosphate material with high air stability in situ through a low-temperature solvothermal method, so that the sodium ferric phosphate pyrophosphate material can be prevented from being in direct contact with air, and the storage stability of Fe < 2 + > in the air is further improved. 本发明为一种碳包覆的Na4Fe3(PO4)2P2O7@碳包覆的NaVPO4F的制备方法及在钠离子电池中的应用。通过低温溶剂热法在磷酸焦磷酸铁钠材料表面原位包覆一层空气稳定性高的四方型一氟磷酸钒钠材料，可以避免磷酸焦磷酸铁钠材料和空气直接接触，进而提高Fe2+在空气中的存储稳定性。