Integrated preparation process for long-life hydrogen storage alloy film/nickel foil combined electrode material

A technology of hydrogen storage alloy and composite electrode, which is applied in metal material coating process, battery electrode, nickel storage battery, etc., can solve the problems of slow electrochemical reaction kinetics, large contact resistance, and performance hindrance of Ni-MH battery, etc. To achieve the effect of reducing the contact internal resistance, increasing the specific surface area, and accelerating the transmission rate

Inactive Publication Date: 2019-10-25
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method will cause a large contact resistance between the active material and the current collector, and the large internal resistance will lead to slow electrochemical reaction kinetics, which will hinder the further improvement of Ni-MH battery performance.

Method used

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  • Integrated preparation process for long-life hydrogen storage alloy film/nickel foil combined electrode material
  • Integrated preparation process for long-life hydrogen storage alloy film/nickel foil combined electrode material
  • Integrated preparation process for long-life hydrogen storage alloy film/nickel foil combined electrode material

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Embodiment approach

[0032] An integrated preparation method for a long-life hydrogen storage alloy film / nickel foil composite electrode material, comprising the following steps:

[0033] a. Cut the nickel foil to 3.5cm×3.5cm as a substrate for sputtering, then immerse it in acetone and ultrasonicate for 10 minutes to remove oil stains on the surface of the substrate;

[0034] b. Rinse the substrate with deionized water for 3 times, then immerse it in deionized water and let it stand for 10 minutes;

[0035] c. Configure a 3mol / L hydrochloric acid solution, immerse the substrate in the prepared hydrochloric acid solution, and let it stand for 10 minutes to remove oxides on the surface of the substrate;

[0036] d. Take out the substrate, rinse it with deionized water 3 times, and then immerse it in deionized water again and let it stand for 10 minutes;

[0037] e. Finally, wash with absolute ethanol and dry in a vacuum environment for 6-12 hours.

Embodiment 1

[0039] The preparation process and steps in the present embodiment are as follows:

[0040] (1) Alloy preparation: according to La 0.6 Ce 0.3 Y 0.1 Ni 3.7 Co 0.75 Mn 0.3 Al 0.35 The chemical ratio of lanthanum, cerium, yttrium, nickel, cobalt, manganese and aluminum with a purity of ≥99.5 is vacuum induction smelted in a high-purity argon atmosphere, and the melting temperature is 1300 ° C to obtain an alloy ingot with a high cooling rate. , in order to improve the uniformity of the alloy. The ingot is then heat-treated in an argon protective atmosphere at a temperature of 1000°C, and then mechanically ground in an argon protective atmosphere to obtain hydrogen storage alloy powder with an average particle size of 50 μm;

[0041] (2) Target material preparation: Press the obtained hydrogen storage alloy powder into a target material with a diameter of ≤50mm and a thickness of ≤3mm, and use metal indium to bind it to the copper backplane to obtain a target for magnetron ...

Embodiment 2

[0045] The preparation process and steps in the present embodiment are as follows:

[0046] (1) Alloy preparation: according to La 0.6 Ce 0.3 Y 0.1 Ni 3.7 Co 0.75 Mn 0.3 Al 0.35 The chemical ratio of lanthanum, cerium, yttrium, nickel, cobalt, manganese and aluminum with a purity of ≥99.5 is vacuum induction smelted in a high-purity argon atmosphere, and the melting temperature is 1300 ° C to obtain an alloy ingot with a high cooling rate. , in order to improve the uniformity of the alloy. The ingot is then heat-treated in an argon protective atmosphere at a temperature of 1000°C, and then mechanically ground in an argon protective atmosphere to obtain hydrogen storage alloy powder with an average particle size of 50 μm;

[0047] (2) Target material preparation: Press the obtained hydrogen storage alloy powder into a target material with a diameter of ≤50mm and a thickness of ≤3mm, and use metal indium to bind it to the copper backplane to obtain a target for magnetron ...

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Abstract

The invention relates to an integrated preparation process for a long-life hydrogen storage alloy film/nickel foil combined electrode material. The process is characterized by comprising steps that a,rare earth elements and other metal elements are smelted under argon protection conditions to obtain cast ingot, and the cast ingot is then made into alloy powder under the protection of argon; b, the alloy powder is pressed into an alloy target for sputtering; c, a nickel foil substrate for sputtering is cut and cleaned; d, the working pressure, the sputtering power, the sputtering time and thesubstrate temperature for sputtering are set, and the hydrogen storage alloy film is prepared. Through the prepared combined electrode material, the diffusion distance of electrons/ions is effectivelyreduced, the specific surface area of the alloy is increased, the contact resistance between an active material and a current collector is reduced, integrated preparation of the long-life hydrogen storage alloy film/nickel foil composite electrode material is realized, and a new method and idea is provided for reducing the internal resistance of a nickel-hydrogen battery and increasing the electrochemical reaction rate.

Description

technical field [0001] The invention relates to a method for preparing a long-life hydrogen storage alloy thin film / nickel foil composite electrode material by magnetron sputtering. Background technique [0002] New energy vehicles play a crucial role in coping with the energy crisis and global warming, among which nickel-metal hydride (Ni-MH) batteries have high energy density, high power density, environmental friendliness, safety, and a wide range of Temperature adaptability and other characteristics, are used in various electronic devices and equipment. Ni-MH batteries are generally obtained by cold pressing hydrogen storage alloy powder (active material) and carbonyl nickel powder (current collector and binder). However, this method will lead to a large contact resistance between the active material and the current collector, and the large internal resistance will lead to slow electrochemical reaction kinetics, which in turn hinders the further improvement of Ni-MH bat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/24H01M4/28H01M4/38H01M10/30C23C14/16C23C14/34C23C14/35
CPCH01M4/242H01M4/28H01M4/383H01M10/30C23C14/35C23C14/3407C23C14/165Y02E60/10
Inventor 陈莹杨春成文子赵明蒋青
Owner JILIN UNIV
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