Search

CN-122025714-A - Combined cooling and power micro-fluid fuel cell system based on nano-fluid electrolyte

CN122025714ACN 122025714 ACN122025714 ACN 122025714ACN-122025714-A

Abstract

The invention discloses a combined cooling and power micro-fluid fuel cell system based on nano-fluid electrolyte, and belongs to the technical field of electrolyte and fuel cells. The nano fluid electrolyte is prepared by using the soluble starch as a dispersing agent, and is used for a micro fluid fuel cell system for combined cooling and power supply, so that the long-term dispersion stability of nano fluid is ensured, the pollution to the surface of an electrode is avoided, the long-term stable operation of the system is realized, the excellent heat conduction characteristic of nano reinforced particles is utilized, the combined cooling and power supply comprehensive performance of the micro fluid fuel cell is remarkably improved, the strong heat dissipation capability is provided, the temperature of a chip is effectively controlled within an industrial safety threshold under high heat load, and higher electric energy output is also provided, so that the power density of the fuel cell is greatly improved.

Inventors

  • WANG YIFEI
  • DAI HAO
  • ZHANG MINGMING
  • XU XINHAI

Assignees

  • 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院)

Dates

Publication Date
20260512
Application Date
20260317

Claims (9)

  1. 1. The combined cooling and power micro-fluid fuel cell system based on the nano-fluid electrolyte is characterized by comprising a micro-fluid fuel cell, a thermal simulation chip, a fluid conveying unit, an electrochemical performance testing unit and a thermal performance monitoring unit, wherein the micro-fluid fuel cell contains the nano-fluid electrolyte, and the nano-fluid electrolyte comprises soluble starch, nano-reinforced particles and a base electrolyte.
  2. 2. The microfluidic fuel cell system based on combined cooling and power of the nanofluidic electrolyte according to claim 1, wherein the microfluidic fuel cell comprises a top plate (1), a flow field plate (2) and a bottom plate (3), Y-shaped micro-channels (6) are arranged on the flow field plate (2), and two branches of the Y-shaped micro-channels (6) are respectively used as inlet flow channels of anolyte and catholyte.
  3. 3. The nanofluid electrolyte-based combined cooling and heating microfluidic fuel cell system of claim 1, wherein the thermal analog chip comprises a substrate, a resistive wire, and an insulating protective layer.
  4. 4. The nano-fluid electrolyte-based combined cooling and power micro-fluid fuel cell system according to claim 1, wherein the nano-reinforcing particles are selected from nano-graphenes, the average particle size of the nano-graphenes is 0.5-3 μm, and the average thickness of the nano-graphenes is 5nm.
  5. 5. The nanofluidic electrolyte-based combined cooling and heating microfluidic fuel cell system of claim 1, wherein the mass ratio of soluble starch to nano-reinforcing particles is 5:1.
  6. 6. The nano-fluid electrolyte based combined cooling and power micro-fluid fuel cell system of claim 1, wherein the concentration of the nano-reinforcing particles in the nano-fluid electrolyte is 0.1wt.%.
  7. 7. The nanofluid electrolyte-based combined cooling and heating micro-fluid fuel cell system according to claim 1, wherein the base electrolyte comprises an anode base electrolyte or a cathode base electrolyte, wherein the anode base electrolyte is prepared by dissolving potassium hydroxide and ethanol in water, and the cathode base electrolyte is prepared by dissolving potassium hydroxide in water.
  8. 8. The nano-fluid electrolyte-based combined cooling and power micro-fluid fuel cell system according to claim 1, wherein the preparation method of the nano-fluid electrolyte comprises the following steps: preparing a basic electrolyte, adding soluble starch into the basic electrolyte, and heating and stirring to obtain the basic electrolyte containing a dispersing agent; And adding nano reinforced particles into the base electrolyte containing the dispersing agent, and performing ultrasonic treatment under ice bath to obtain the nano fluid electrolyte.
  9. 9. A method for recycling nano-reinforced particles in a microfluidic fuel cell system based on combined cooling and power of nano-fluid electrolyte as claimed in any one of claims 1 to 8, comprising the steps of: Filtering the used nano fluid electrolyte by adopting filter paper with the aperture of 50-200 nm to obtain recycled nano reinforced particles; Dispersing the recycled nano reinforced particles in fresh basic electrolyte containing a dispersing agent, and carrying out ultrasonic treatment to obtain the novel nano fluid electrolyte.

Description

Combined cooling and power micro-fluid fuel cell system based on nano-fluid electrolyte Technical Field The invention belongs to the technical field of electrolyte and fuel cells, and particularly relates to a combined cooling and power micro-fluid fuel cell system based on nano-fluid electrolyte. Background The exponential increase in heat flux density of modern microelectronic devices presents unprecedented challenges to thermal management techniques. The heat flux density of high performance microprocessors has exceeded 10W/cm2, and some advanced systems even approach or exceed 100W/cm2. Such extremely high thermal loads can lead to reduced chip performance, reduced reliability, and reduced lifetime, and may even raise potential safety hazards. The traditional passive heat dissipation technologies such as air cooling, liquid cooling, thermoelectric refrigeration and the like are gradually unable to meet the heat dissipation requirements of the next generation high-density electronic system due to the problems of limited heat transfer coefficient, high system complexity or low energy efficiency ratio. Meanwhile, a large amount of waste heat is directly discharged into the environment, resulting in serious energy waste. Therefore, there is an urgent need to develop a novel thermal management technology capable of recycling waste heat while effectively cooling a chip. The combined cooling, heating and power technology provides a new way for solving the problems, and the technology can remove waste heat and convert the waste heat into useful electric energy at the same time, so that the dual functions of heat management and energy recovery are realized on a single integrated platform. As an emerging electrochemical energy conversion device, a microfluidic fuel cell is used to realize laminar flow separation of fuel and oxidant in a microchannel based on the laminar flow principle, and electrochemical reaction can be performed without a physical diaphragm to generate electricity. In recent years, researchers have proposed the use of microfluidic fuel cells for on-chip cogeneration applications, utilizing flowing electrolytes to serve the dual functions of both an ionic conductor and a microfluidic coolant. However, the traditional water-based electrolyte has low thermal conductivity (0.5-0.6W/m.K), so that the heat transfer capability is insufficient, the heat on the surface of the chip with high heat flux density is difficult to remove effectively, and the temperature of the chip cannot be controlled in a safe working range. Meanwhile, although improving the electrolyte flow rate can improve the cooling effect, the residence time of reactants on the electrode surface can be reduced, and the power generation performance can be damaged, so that the contradiction between cooling and power generation can be formed. Nanofluids have been widely studied for enhanced heat transfer applications as colloidal suspensions of nanomaterials in a base fluid. By adding metal, metal oxide or carbon-based nano material into the traditional heat transfer fluid, the heat conductivity coefficient of the fluid can be remarkably improved, the heat transfer specific surface area can be increased, and the convection heat transfer effect can be enhanced. In particular, graphene and derivatives thereof have ultrahigh intrinsic heat conductivity (pure graphene can reach 5000W/m.K), large specific surface area and adjustable surface chemical property, and thus, the graphene and derivatives thereof have great potential in the field of nano-fluid enhanced heat transfer. However, practical applications of nanofluids face a number of challenges including poor dispersion stability of nanoparticles, susceptibility to agglomeration and sedimentation, difficult selection of dispersants, compatibility issues with system components, and high material costs. More importantly, although nanofluids have been widely studied in the field of heat transfer, the technological route of integrating nanofluids into microfluidic fuel cells to achieve enhanced cogeneration has never been explored. Such integration faces unique technical challenges including the compatibility of the nanoparticles with the electrochemical reaction, the potential for blocking the catalyst active sites by the nanoparticles, the impact on fuel cross diffusion, the dispersion stability in the thermo-mechanical-chemical-electrical composite stress environment, and the potential interference of the dispersant with electrochemical performance. Disclosure of Invention In order to solve the technical problems, the invention provides a combined cooling and power micro-fluid fuel cell system based on a nano-fluid electrolyte. In order to achieve the above purpose, the present invention provides the following technical solutions: The invention provides a combined cooling and power micro-fluid fuel cell system based on a nano-fluid electrolyte, which comprises a micro-fluid fuel cell, a ther