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Direct sodium borohydride fuel cell anode and manufacture method thereof

A sodium borohydride, fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of unstable electron conduction, low catalyst space utilization, poor binding force, etc., to achieve large actual space utilization, good Effects of stability and longevity, high electrical conductivity

Active Publication Date: 2013-02-13
浙江宁松热能锅炉设备股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the disadvantages of unstable electron conduction, poor binding force and low catalyst space utilization rate in the existing anode, the present invention provides a direct sodium borohydride fuel with stable electron conduction, good binding force and high catalyst space utilization rate Battery anode and preparation method thereof

Method used

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  • Direct sodium borohydride fuel cell anode and manufacture method thereof
  • Direct sodium borohydride fuel cell anode and manufacture method thereof
  • Direct sodium borohydride fuel cell anode and manufacture method thereof

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Embodiment 1

[0027] combined with figure 1 , 2

[0028] A direct sodium borohydride fuel cell anode, using foamed nickel 3 as a current collector, the foamed nickel 3 is covered with etch pits, the size of the etch pits is on the order of nanometers, and each pit is grown with Pd nanorods 1 or Pd nanometers. Particle 2, the Pd nanorods 1 or Pd nanoparticles 2 are used as the anode catalyst of the fuel cell.

[0029] Pd nanorods 1 do not overlap each other; Pd nanoparticles 2 do not overlap each other.

[0030] Pd nanorod 1 has four sides, each of which is {100} Pd Planes.

[0031] The diameter of Pd nanorod 1 is 3-50 nm, the length is 20-500 nm, and the spatial shape is cuboid.

[0032] Pd nanoparticle 2 has six surfaces, each of which is {100} Pd Planes.

[0033] The spatial shape of Pd nanoparticles 2 is close to a cube, and the side length is 2~20 nm;

[0034] The preparation method of the described direct sodium borohydride fuel cell anode comprises the following steps:

[003...

Embodiment 2

[0045] Immerse nickel foam in dilute hydrochloric acid solution for 1~4 h, take out, clean and dry. Then, the corroded nickel foam was immersed in a mixture of polyvinylpyrrolidone, sodium chloropalladate, potassium bromide, ethanol and ascorbic acid at 60 o C kept the reaction for 12 h. The nickel foam covered with Pd nanorods was taken out, rinsed with water and dried naturally, and then cut into an area of ​​2*3 cm, in which the diameter of the Pd nanorods was 3-50 nm, the length was 20-500 nm, and the spatial shape was a cuboid. , all four sides are {100} Pd Planes. A direct sodium borohydride fuel cell is assembled with Pt / C as the cathode, N117 membrane as the electrolyte membrane, and the foamed nickel of the present invention as the anode current collector and catalyst. The battery discharge test results after feeding sodium borohydride alkaline fuel and oxygen show that the battery has good electrical output performance, and the maximum output power density exc...

Embodiment 3

[0047] Immerse nickel foam in dilute sulfuric acid solution for 0.5-6 h, take out, clean and dry. Then, the corroded nickel foam was immersed in a mixture of polyvinylpyrrolidone, sodium chloropalladate, potassium bromide, ethanol and sodium borohydride at 10 o C kept the reaction for 0.1 h. The nickel foam covered with Pd nanoparticles was taken out, rinsed with water and dried naturally, and then cut into an area of ​​2*3 cm, in which the spatial shape of the Pd nanoparticles was close to a cube, with a side length of 2-20 nm, and the six sides were { 100} Pd Planes. A direct sodium borohydride fuel cell is assembled with Pt / C as the cathode, N117 membrane as the electrolyte membrane, and the foamed nickel of the present invention as the anode current collector and catalyst. The discharge test results of the battery after feeding sodium borohydride alkaline fuel and oxygen show that the battery has good electrical output performance, and the maximum output power densit...

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Abstract

The invention discloses a direct sodium borohydride fuel cell anode. Etching pits are fully distributed in a foamed nickel current collector, wherein the dimensions of the etching pits are in nanometer scale; Pd nanorods or PD nanoparticles grow inside the etching pits and are used as anode catalyst of the fuel cell. The manufacture method for the anode structure comprises the steps of: putting the foamed nickel in a dilute acid solution for a period of time, thus generating the etching pits in the surface of metal Ni of the foamed nickel, wherein the diameters and the depths of the etching pits are in nanometer scale; taking the foamed nickel out of the dilute acid solution, washing, and drying the foamed nickel; putting the foamed nickel in a mixed solution of polyvinyl pyrrolidone, sodium chloropalladate, potassium bromide, ethanol and a reducing agent for reacting for 0.1-12h at 10 DEG C to 200 DEG C; taking out the foamed nickel, washing and drying the foamed nickel, and cutting the washed and dried foamed nickel to be in proper dimension as the anode. The direct sodium borohydride fuel cell anode has the advantages of stable electron conduction, good binding force and high catalyst space utilization rate.

Description

technical field [0001] The technology relates to an electrode of a fuel cell, in particular to an anode used in a direct sodium borohydride fuel cell and a preparation method thereof. Background technique [0002] Fuel cell is a power generation technology that directly converts chemical energy stored in fuel into electrical energy. Because of its advantages of high energy conversion efficiency, low emission, no pollution and no noise, it is considered to be the next generation technology after thermal power, hydropower and nuclear power. A fourth method of generating electricity. [0003] Direct sodium borohydride fuel cell is a kind of direct liquid fuel cell with proton exchange membrane as electrolyte and sodium borohydride as fuel. In addition to the advantages shared by other fuel cells, it also has unique advantages. For example: normal temperature use, simple structure, convenient fuel carrying and replenishment, good mobility, very suitable as a small mobile and p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/92H01M4/88
CPCY02E60/50
Inventor 秦海英王娟季振国倪华良迟洪忠赵淑敏何燕刘嘉斌
Owner 浙江宁松热能锅炉设备股份有限公司
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