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Preparation method of red phosphorus-doped TiO2/C nanofiber negative electrode material

A technology of nanofibers and anode materials, which is applied in the field of preparation of red phosphorus-doped TiO2/C nanofiber anode materials, can solve the problem of low specific capacity, achieve convenient operation, simple preparation process, and improve electrochemical performance

Pending Publication Date: 2020-06-05
XIANGTAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it still has the disadvantage of low specific capacity, and the specific capacity of titanium dioxide can be effectively improved by doping heteroatoms with large specific capacity.

Method used

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  • Preparation method of red phosphorus-doped TiO2/C nanofiber negative electrode material
  • Preparation method of red phosphorus-doped TiO2/C nanofiber negative electrode material
  • Preparation method of red phosphorus-doped TiO2/C nanofiber negative electrode material

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Embodiment 1

[0034] At 15-25°C, add 0.8g of polyvinylpyrrolidone into a sealable glass bottle containing 9mL of N,N-dimethylformamide, stir the solution at 300rpm for 5min to make the solution evenly mixed, then add 2.0g of butyl titanate ester, after stirring for 6 hours at the same speed, a light yellow transparent solution was obtained; the obtained light yellow transparent solution was transferred to an electrospinning medical syringe, and spinning was started on an electrospinning device, and the nanofibers obtained by spinning were received with tin foil . The electrospinning parameters are: the distance between the spinning needle and the metal collecting substrate is 15cm, the spinning voltage is 15KV, the ambient temperature is 30°C, the humidity is controlled at 30%, and the liquid feeding rate is 0.18mL / h. The substrate tin foil loaded with nanofibers was vacuum-dried at 60°C for 6h, and the nanofibers on the substrate tinfoil were collected and moved into a corundum ark, and pu...

Embodiment 2

[0036] At 15-25°C, add 0.8g of polyvinylpyrrolidone into a sealable glass bottle containing 9mL of N,N-dimethylformamide, then add 2mL of glacial acetic acid, stir magnetically at 300rpm for 5min to mix the solution evenly, and then Add 2.0 g of butyl titanate, stir at the same speed for 6 hours to obtain a light yellow transparent solution; transfer the obtained light yellow transparent solution to an electrospinning medical syringe, start spinning on an electrospinning device, and spin to obtain The nanofibers were received with tin foil. The electrospinning parameters are: the distance between the spinning needle and the metal collecting substrate is 15cm, the spinning voltage is 15KV, the ambient temperature is 30°C, the humidity is controlled at 30%, and the liquid feeding rate is 0.18mL / h. The substrate tin foil loaded with nanofibers was vacuum-dried at 60°C for 6h, and the nanofibers on the substrate tinfoil were collected and moved into a corundum ark, and put into a tu...

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Abstract

The present invention relates to a preparation method of a red phosphorus-doped TiO2 / C negative electrode material. The method comprises the steps of firstly, uniformly mixing N,N-dimethyl formamide,polyethylene pyrrolidone and acetic acid, adding butyl titanate, stirring the components to be dissolved completely to obtain a faint yellow transparent electrostatic spinning precursor solution, transferring the solution into an electrostatic spinning medical injector, starting spinning on an electrostatic spinning device, and receiving nanofibers obtained by spinning through a tin foil; and then, performing vacuum drying on a tin foil substrate with the nanofibers firstly, then collecting the nanofibers by a corundum boat, performing curing treatment to obtain TiO2 nanofibers, and then performing a sublimation-condensation method on red phosphorus and TiO2 to obtain the red phosphorus-doped TiO2 / C negative electrode material. The obtained red phosphorus-doped TiO2 / C nanofibers are relatively uniform in diameter that is about 100-250 nm, and meanwhile, due to the introduction of the doping element, the electrochemical performance of the material in a potassium ion battery is significantly improved.

Description

technical field [0001] The invention relates to a negative electrode material for a potassium ion battery, in particular to a red phosphorus-doped TiO 2 The preparation method of / C nanofiber negative electrode material. Background technique [0002] In today's world, energy and environmental problems are becoming more and more serious. Traditional fossil energy is no longer enough to support the world's energy needs. The development of renewable energy and clean energy has become the key to solving the current predicament. Lithium-ion batteries have achieved their industrialization, but due to the limited lithium resources, the reserves are decreasing day by day, and the ensuing cost issues force people to seek new energy storage methods. Potassium-ion batteries emerged as the times require and have become a hot topic of current research. Potassium is rich in reserves on the earth and low in cost, and potassium-ion batteries have a "rocking chair" working principle simila...

Claims

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Application Information

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IPC IPC(8): D01F11/12D01F9/21D01F1/10H01M4/48H01M4/587H01M4/62H01M10/054B82Y30/00B82Y40/00
CPCD01F11/12D01F11/126D01F9/21D01F1/10H01M4/483H01M4/587H01M4/62H01M10/054B82Y30/00B82Y40/00H01M2004/027H01M2004/022Y02E60/10
Inventor 刘黎戴晶苏蝶刘珺芳王先友
Owner XIANGTAN UNIV
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