A three dimensional self assembled NaV2O5 nano powder and its preparation method and application, adding sodium vanadate and Na2S 9H2O into the deionized water to obtain the solution A; the solution A is poured into the reaction liner and sealed, and the inner lining is installed in the kettle and fixed in the hydrothermal reaction in the homogeneous reactor; after the hydrothermal reaction ends, the products are collected and the water and alcohol are collected and alcohol. In addition, the collected products were frozen in the cold well of the freeze dryer and vacuum dried to obtain the three-dimensional self-assembled NaV2O5 nanopowders. The three dimensional self assembled NaV2O5 nano powders are composed of microbeams with a diameter of 5~10 micron m. The microbeam is composed of a submicron rod with a diameter of 200nm, in which the submicron rods present the mesocrystalline structure. When it is applied to the anode of a lithium ion battery, the capacity is still up to 1 when returning to the current density of 100mAg 1, with a current density of up to 1. Under the current density of 100mAg 1, the cycle is 360 cycles and the capacity reaches 580mAhg 1. In the test of ratio and cycle performance, the NaV2O5 nanoscale powder is shown. The smooth Kulun efficiency. One
【技术实现步骤摘要】
一种三维自组装NaV2O5纳米粉体及其制备方法与应用
本专利技术涉及一种NaV2O5粉体及其制备方法,具体涉及一种三维自组装NaV2O5纳米粉体及其制备方法与应用。
技术介绍
NaV2O5由于其具有独特的钒氧骨架、稳定的结构、较大的层间距、优异的物理化学性质及大量氧空位的存在,被认为是一种非常有发展前景的能源存储材料,并且已经在钠离子电池正极领域得到了应用[LiuP,ZhouD,ZhuK,WuQ,WangY,TaiG,etal.Bundle-likealpha'-NaV2O5mesocrystals:fromsynthesis,growthmechanismtoanalysisofNa-ionintercalation/deintercalationabilities.Nanoscale.2016;8:1975-85.],然而还没有关于其作为锂离子电池负极材料应用的报道。此外,之前关于NaV2O5的合成方法的报道主要有两种。一种是固相法,其具有较高的合成温度、反应复杂、能耗大及成本高。另一种是两步水热法,虽然合成温度低了,但是合成流程冗长且较为复杂。
技术实现思路
本专利技术的目的在于提供一种三维自组装NaV2O5纳米粉体及其制备方法与应用。为达到上述目的,本专利技术采用制备方法如下:步骤一:取0.8~1.2g偏钒酸钠和0.05~0.1gNa2S·9H2O加入到55~65ml去离子水中,磁力搅拌或超声分散得到半澄清溶液A;步骤二:按55~65%的填充比将溶液A倒入反应内衬后密封,将内衬装于外釜中固定后置于均相反应仪中,在5~15r/min的转速条件下由室温加热 ...
【技术保护点】
1.一种三维自组装NaV2O5纳米粉体的制备方法,其特征在于:
【技术特征摘要】
1.一种三维自组装NaV2O5纳米粉体的制备方法,其特征在于:步骤一:取0.8~1.2g偏钒酸钠和0.05~0.1gNa2S·9H2O加入到55~65ml去离子水中,磁力搅拌或超声分散得到半澄清溶液A;步骤二:按55~65%的填充比将溶液A倒入反应内衬后密封,将内衬装于外釜中固定后置于均相反应仪中,在5~15r/min的转速条件下由室温加热到195~205℃进行水热反应;步骤三:水热反应结束后将反应釜自然冷却到室温,收集产物并经水和醇交替清洗3~6次;步骤四:将收集的产物置于冷冻干燥机的冷井中进行冷冻,然后将冷冻后的产物置于托盘中,盖上密封罩,抽真空到10~20Pa,干燥12~18h后收集产物即得到三维自组装NaV2O5纳米粉体。2.根据权利要求1所述的三维自组装NaV2O5纳米粉体的制备方法,其特征在于:所述步骤一磁力搅拌或超声时间为55~65min,磁力搅拌转速为800~1000r/min。3.根据权利要求1所述的三维自组装NaV2O5纳米粉体的制备方法,其特征在于:所述步骤二水热反应时间为23~25h。4.根据权利要求1所述的三维自组装NaV2O5纳米粉体的制备方法,其特征在于:所述步骤三的收集采用抽滤或离心进行。5.根据权利要求1所述的三维自组装NaV2O5纳米粉...
【专利技术属性】
技术研发人员:黄剑锋,李文斌,何枢薇,曹丽云,冯亮亮,范海鑫,畅珣伟,王娜,
申请(专利权)人:陕西科技大学,
类型:发明
国别省市:陕西,61
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