/c分级微米花电极材料及其制备方法和应用

Nanosheet-assembled Na3V2(PO4)3/C graded micron flower electrode material as well as preparation method and application thereof

Abstract

The invention relates to a nanosheet-assembled Na3V2(PO4)3/C graded micron flower and a preparation method thereof. The material can be used as an active material for lithium ion battery anodes, has a diameter of 1-2 microns and is assembled by Na3V2(PO4)3/C nanosheets with thicknesses of 20-40 nanometers. The nanosheet-assembled Na3V2(PO4)3/C graded micron flower has the benefit that the nanosheet-asesembled Na3V2(PO4)3/C graded micron flower is prepared by a solution sedimentation-calcination two-step method on the basis of the relationship between the solution polarity and solubility and an Ostwald curing mechanism; when being used as the active material for lithium ion battery anodes, the nanosheet-assembled Na3V2(PO4)3/C graded micron flower shows favorable cycling stability and superior rate capability and is a high-rate and long-service life potential application material for lithium ion batteries; secondarily, the nanosheet-assembled Na3V2(PO4)3/C graded micron flower is simple in process, short in synthesis time and mild in conditions, accords with the requirements of green chemistry and is beneficial to market popularization.
本发明涉及纳米片组装的Na3V2(PO4)3/C分级微米花及其制备方法,该材料可作为锂离子电池正极活性材料,其直径为1-2微米,由厚度为20-40纳米的Na3V2(PO4)3/C纳米片组装而成。本发明的有益效果是:本发明主要是基于溶液极性与溶解度的关系,结合奥施特瓦尔德熟化机制,采用溶液沉淀-煅烧两步法制备出纳米片组装的Na3V2(PO4)3/C分级微米花,其作为锂离子电池正极活性材料时,表现出良好的循环稳定性的优越的倍率性能是高倍率、长寿命锂离子电池的潜在应用材料;其次,本发明工艺简单,合成时间短,条件温和,符合绿色化学的要求,利于市场化推广。

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Cited By (3)

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    CN-105336924-AFebruary 17, 2016中南大学一种碳包覆的磷酸钒钠正极材料的制备方法
    CN-105375008-AMarch 02, 2016武汉理工大学@rGO纳米复合材料及其制备方法和应用
    WO-2017124439-A1July 27, 2017武汉理工大学三维Na3V2(PO4)3纳米线网络电极材料及其制备方法和应用