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CN-122013442-A - High-entropy alloy nano carbon fiber film based on parallel structure, preparation method and application

CN122013442ACN 122013442 ACN122013442 ACN 122013442ACN-122013442-A

Abstract

The invention discloses a high-entropy alloy carbon nanofiber membrane based on a parallel structure, a preparation method and application thereof, wherein the specific preparation method comprises the following steps of S1, dissolving a metal salt precursor and polyacrylonitrile in a solvent to obtain a spinning solution A; S2, dissolving polyacrylonitrile in a solvent to obtain a spinning solution B, carrying out electrostatic spinning on the spinning solution A and the spinning solution B through parallel needles to obtain a nanofiber membrane precursor with a parallel structure, and S4, carrying out pre-oxidation and carbonization treatment on the nanofiber membrane precursor in sequence to obtain the high-entropy alloy nanofiber membrane with the parallel structure. The invention aims to solve the technical problem that the existing carbon nanofiber material for the photovoltaic power generation is difficult to achieve both high interfacial activity and high conductivity.

Inventors

  • DAI JIAMU
  • YANG YUXIN
  • YANG XIAOCHUAN
  • LIU RONG
  • ZHANG GUANGYU
  • ZHANG WEI

Assignees

  • 南通大学

Dates

Publication Date
20260512
Application Date
20260329

Claims (9)

  1. 1. The preparation method of the high-entropy alloy nano carbon fiber film based on the parallel structure is characterized by comprising the following specific preparation steps: S1, dissolving a metal salt precursor and polyacrylonitrile in a solvent to obtain a spinning solution A; s2, dissolving polyacrylonitrile in a solvent to obtain a spinning solution B; S3, carrying out electrostatic spinning on the spinning solution A and the spinning solution B through parallel needles to obtain a nanofiber membrane precursor with a parallel structure, wherein the push-injection speed ratio of the spinning solution A to the spinning solution B is 1 (1.5-7); and S4, sequentially performing pre-oxidation and carbonization treatment on the nanofiber membrane precursor to obtain the high-entropy alloy nanofiber membrane with the parallel structure.
  2. 2. The method for preparing the high-entropy alloy nano carbon fiber film based on the parallel structure according to claim 1, wherein in the step S3, the injection speed of the spinning solution A is 0.1-0.5 mL/h, and the injection speed of the spinning solution B is 0.5-0.9 mL/h.
  3. 3. The method for preparing the high-entropy alloy carbon nanofiber membrane based on the parallel structure according to claim 1, wherein the metal salt precursor comprises ferric salt, cobalt salt, nickel salt, magnesium salt, manganese salt and zinc salt, and the molar ratio of Fe, co, ni, mg, mn, zn is 2:2:2:2:1:1.
  4. 4. The preparation method of the high-entropy alloy carbon nanofiber membrane based on the parallel structure according to claim 1 is characterized in that in the step S1, the mass percentage concentration of the metal salt precursor in the spinning solution A is 5-20wt%, and the mass percentage concentration of the polyacrylonitrile in the spinning solution A is 8-12%.
  5. 5. The preparation method of the high-entropy alloy nano carbon fiber film based on the parallel structure according to claim 1, wherein in the step S2, the mass percentage concentration of the polyacrylonitrile in the spinning solution B is 8-12%.
  6. 6. The method for preparing the high-entropy alloy carbon nanofiber membrane based on the parallel structure according to claim 1, wherein in the step S4, the pre-oxidation temperature is 150-250 ℃, and the carbonization temperature is 800-1000 ℃.
  7. 7. A high-entropy alloy nano carbon fiber membrane based on a parallel structure, which is characterized in that the nano carbon fiber membrane is prepared by adopting the preparation method of any one of claims 1-6, and is composed of a first fiber part and a second fiber part which are arranged in parallel, wherein the first fiber part contains high-entropy alloy nano particles, and the second fiber part is pure carbon fiber.
  8. 8. The high-entropy alloy nano-carbon fiber membrane based on the parallel structure according to claim 7, wherein the cross-sectional area ratio of the first fiber portion to the second fiber portion is 1 (1.5-7).
  9. 9. Use of the high-entropy alloy nano carbon fiber membrane based on parallel structure according to claim 6 or 7 in the photovoltaic power generation.

Description

High-entropy alloy nano carbon fiber film based on parallel structure, preparation method and application Technical Field The invention belongs to the technical field of carbon nanofiber membrane preparation, and particularly relates to a high-entropy alloy carbon nanofiber based on a parallel structure, a preparation method and application. Background Along with the continuous increase of global energy demand, the technology of generating electricity by using water is an emerging clean energy acquisition mode, and water energy in the environment is directly converted into electric energy by utilizing the interaction between water molecules and functional materials, so that the technology is widely focused. Carbon nanofiber materials are used as active layer materials for photovoltaic power generation due to their good electrical conductivity and controllable surface properties. However, the existing carbon nanofiber material for photovoltaic power generation still has the following disadvantages: On the one hand, in order to promote the interaction between water molecules and materials, it is often necessary to hydrophilically modify the carbon nanofibers or introduce functional components. The existing modification mode mostly adopts a post-treatment dipping or coating process, the bonding force between the modification layer and the matrix is poor, the modification layer is easy to fall off in the use process, and the long-term stability of the material is affected. On the other hand, although the introduction of the modifying component can enhance the interface effect of water molecules, the conductivity of the material is often reduced, and the conductivity directly determines the charge transmission efficiency in the process of the photovoltaic power generation. The existing material is difficult to realize high interfacial activity and high conductivity at the same time, and further improvement of the performance of the photovoltaic power generation is limited. Disclosure of Invention The invention provides a high-entropy alloy carbon nanofiber based on a parallel structure, a preparation method and application thereof, and aims to solve the technical problem that the existing carbon nanofiber material for the photovoltaic power generation is difficult to achieve both high interfacial activity and high conductivity. The technical scheme adopted in the invention is as follows: the preparation method of the high-entropy alloy nano carbon fiber film based on the parallel structure comprises the following specific preparation steps: S1, dissolving a metal salt precursor and polyacrylonitrile in a solvent to obtain a spinning solution A; s2, dissolving polyacrylonitrile in a solvent to obtain a spinning solution B; S3, carrying out electrostatic spinning on the spinning solution A and the spinning solution B through parallel needles to obtain a nanofiber membrane precursor with a parallel structure, wherein the push-injection speed ratio of the spinning solution A to the spinning solution B is 1 (1.5-7); and S4, sequentially performing pre-oxidation and carbonization treatment on the nanofiber membrane precursor to obtain the high-entropy alloy nanofiber membrane with the parallel structure. Preferably, in step S3, the injection speed of the spinning solution A is 0.1-0.5 mL/h, and the injection speed of the spinning solution B is 0.5-0.9 mL/h. Preferably, the metal salt precursor comprises iron, cobalt, nickel, magnesium, manganese, and zinc salts, and the molar ratio of Fe, co, ni, mg, mn, zn is 2:2:2:1:1. Preferably, in the step S1, the mass percentage concentration of the metal salt precursor in the spinning solution A is 5-20wt%, and the mass percentage concentration of the polyacrylonitrile in the spinning solution A is 8-12%. Preferably, in the step S2, the mass percentage concentration of the polyacrylonitrile in the spinning solution B is 8-12%. Preferably, in step S4, the pre-oxidation temperature is 150-250 ℃ and the carbonization temperature is 800-1000 ℃. The high-entropy alloy carbon nanofiber membrane based on the parallel structure is prepared by the preparation method, and the carbon nanofiber membrane is composed of a first fiber part and a second fiber part which are arranged in parallel, wherein the first fiber part contains high-entropy alloy nano particles, and the second fiber part is pure carbon fiber. Preferably, the ratio of the cross-sectional areas of the first fiber portion to the second fiber portion is 1 (1.5-7). An application of a high-entropy alloy nano carbon fiber film based on a parallel structure in the photovoltaic power generation. The high-entropy alloy carbon nanofiber based on the parallel structure, the preparation method and the application have the following advantages: (1) The invention adopts parallel structure design, and the high-entropy alloy modified carbon fiber and the pure carbon fiber are integrated in the same fiber in parallel to form functional pa