High-temperature solid phase synthesis method for lithium ion battery anode material Na3V2(PO4)3

Abstract

The invention relates to a novel storage battery electrode material in the field of new energy, namely a lithium ion battery anode material Na3V2(PO4)3. The material is characterized by being obtained by one step through using a simple solid phase reaction method. The method has the advantages that a preparation process is simple, and the cost is relatively low. As the Na3V2(PO4)3 is relatively high in theoretical capacity, good in stable performance, and relatively low in cost and has huge application potential in a large energy storing device in the future, the Na3V2(PO4)3 is widely concerned by scholars in various countries day by day, and becomes one of frontier research hotspots in the world.

Description

technical field [0001] The invention relates to the synthesis of Na by high-temperature solid-phase method 3 V 2 (PO 4 ) 3 Lithium-ion battery cathode material, and related electrochemical performance tests; the results show that this material is a battery cathode material with certain research and application prospects. It belongs to the current hot new energy material technology field. Background technique [0002] Lithium-ion batteries, as the latest generation of environmentally friendly power storage devices, appeared in the early 1990s. Once they appeared, they quickly attracted people's attention and developed rapidly. Lithium batteries have many outstanding advantages, such as high working voltage, high energy density, good cycle performance, etc., and are widely used in electronic devices such as mobile phones and notebook computers. The cathode material is an important part of the lithium-ion battery, which affects the performance of the battery to a large ex...

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Problems solved by technology

Although Na 0.44 MnO 2 The cycle performance of the material is very good, but the actual specific capacity of the material is low, and the working voltage is not high, which limits its application in non-aqueous sodium-ion batteries.

NaFePO 4 F. Na 3 V 2 (PO 4 ) 2 f 3 、NaVPO 4 F and Na 1.5 VOPO 4 f 0.5 Fluorinated phosphates have also been widely studied as cathode materials for sodium-ion batteries and hybrid batteries, but the preparation process of such fluorinated phosphates is complicated and will generate fluorine-containing gases to pollute the environment

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