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Typha orientalis presl carbon-loaded sodium vanadium phosphate nano composite material as well as preparation method and application thereof

A nano-composite material, sodium vanadium phosphate technology, applied in electrical components, battery electrodes, circuits, etc., to achieve the effects of accelerating reaction kinetics, easy control, and high discharge specific capacity

Active Publication Date: 2018-10-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to carry out composite modification for the defect of poor electronic conductivity of sodium vanadium phosphate, and provide a cattail carbon-loaded sodium vanadium phosphate nanocomposite material and its preparation method and application. The cattail carbon-loaded Sodium vanadium phosphate nanocomposites are used as cathode materials for sodium-ion batteries with high charge-discharge capacity, excellent rate performance and cycle stability

Method used

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  • Typha orientalis presl carbon-loaded sodium vanadium phosphate nano composite material as well as preparation method and application thereof
  • Typha orientalis presl carbon-loaded sodium vanadium phosphate nano composite material as well as preparation method and application thereof

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Embodiment 1

[0023] Put an appropriate amount of cattail in a porcelain boat, put it into a tube furnace for heat treatment under argon atmosphere to carbonize it, the reaction temperature is 600°C, the reaction time is 2 hours, and slowly cool to room temperature 25°C to obtain the loaded material cattail carbon. Dissolve 0.32g of vanadium trichloride in 10mL of deionized water, stir at room temperature 25°C to obtain a brown solution, then dissolve 0.36g of sodium dihydrogen phosphate and 0.36g of glucose in the above solution, and stir evenly to form a dark green solution. Then continue to stir for a period of time, and the resulting solution is ready for use; soak the prepared cattail carbon in the obtained dark green solution to make it fully infiltrated, then quickly freeze the resulting mixed solution under liquid nitrogen conditions, and then place it in a freeze dryer Dry in the middle for 24 hours to obtain the precursor; put the prepared precursor into a tube furnace for heat tre...

Embodiment 2

[0025] Put an appropriate amount of cattail in a porcelain boat, put it into a tube furnace for heat treatment under argon atmosphere to carbonize it, the reaction temperature is 600°C, the reaction time is 2 hours, and slowly cool to room temperature 25°C to obtain the loaded material cattail carbon. Dissolve 0.32g of vanadium trichloride in 10mL of deionized water, stir at room temperature 25°C to obtain a brown solution, then dissolve 0.36g of sodium dihydrogen phosphate and 0.36g of glucose in the above solution, and stir evenly to form a dark green solution. Then continue to stir for a period of time, and the resulting solution is ready for use; soak the prepared cattail carbon in the obtained dark green solution to make it fully infiltrated, then quickly freeze the resulting mixed solution under liquid nitrogen conditions, and then place it in a freeze dryer dry in the middle for 24 hours to obtain the precursor; put the prepared precursor into a tube furnace for heat tre...

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Abstract

The invention discloses a typha orientalis presl carbon-loaded sodium vanadium phosphate nano composite material as well as a preparation method and application thereof. The method comprises the following steps of preparing a precursor through a freeze-drying method, and performing high-temperature thermal treatment for 8-10 hours to obtain the typha orientalis presl carbon-loaded sodium vanadiumphosphate nano composite material, wherein sodium vanadium phosphate loaded by the composite material is liquid drop-shaped nano particles, has a relatively large specific surface area and provides more reaction activity sites for electrochemical reaction. Meanwhile, carbon matrix obtained after typha orientalis presl carbonization improves the electronic transmission rate of the composite material, so that the reaction kinetics of the composite material is accelerated. In the invention, the electronic conductivity difference of the sodium vanadium phosphate nano composite material is effectively provided, so that a novel sodium-ion battery positive pole material, which has excellent rate capability and cycling stability, is obtained when high specific discharge capacity is realized simultaneously. The composite material has a broad development prospect in fields such as mobile equipment, electric cars and large-scale energy storage.

Description

technical field [0001] The invention relates to the field of cattail carbon-supported sodium vanadium phosphate nanocomposite materials, in particular to a cattail carbon-supported vanadium sodium phosphate nanocomposite material and its preparation method and application. Background technique [0002] With the rapid consumption of traditional fossil fuels and the increasing demand for energy in social development, people are gradually devoting more time and energy to the development and utilization of clean and pollution-free green energy, including solar energy, wind energy, water energy, etc. Among them, electrochemical energy storage has the advantages of low cost, high energy density, and long cycle life, and has become a better choice. Among many electrochemical energy storage systems, lithium-ion batteries are considered to be a potential energy storage system due to their high energy density, high power density and long cycle life. However, the further application o...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M4/62
CPCH01M4/5825H01M4/625Y02E60/10
Inventor 夏新辉黎维王秀丽涂江平
Owner ZHEJIANG UNIV
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