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A method for preparing zinc-indium alloy powder by electrochemical co-deposition

An indium alloy and co-deposition technology, which is applied in the field of preparation of zinc-indium alloy powder, can solve problems such as uneven distribution of indium

Active Publication Date: 2020-04-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problem of inhomogeneous distribution of indium in the zinc negative electrode of the zinc-silver oxide battery, and provides a method for preparing zinc-indium alloy powder by electrochemical co-deposition

Method used

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  • A method for preparing zinc-indium alloy powder by electrochemical co-deposition
  • A method for preparing zinc-indium alloy powder by electrochemical co-deposition
  • A method for preparing zinc-indium alloy powder by electrochemical co-deposition

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specific Embodiment approach 1

[0018] Embodiment 1: The method for preparing zinc-indium alloy powder by electrochemical co-deposition in this embodiment is carried out according to the following steps:

[0019] 1. Press ZnSO 4 The concentration is 20~40g / L, In 2 (SO 4 ) 3 The concentration is 2~6g / L, Na 2 SO 4 The concentration of ZnSO is 10~20g / L, the concentration of EDTA is 35~45g / L, the concentration of citric acid is 4~8g / L, ZnSO 4 、In 2 (SO 4 ) 3 、Na 2 SO 4 , EDTA and citric acid are added to water to dissolve, and the pH is adjusted to 4-6 to obtain a sedimentation solution;

[0020] 2. Use the copper sheet as the cathode and the high-purity zinc sheet as the anode, connect the copper sheet and the zinc sheet to the power supply with wires, and at the same time immerse the copper sheet and the zinc sheet in the deposition solution and keep the distance between the two poles at 3-6cm ; Get the deposition system;

[0021] 3. Turn on the power and deposit under constant current conditions, ...

specific Embodiment approach 2

[0023] Specific embodiment two: the difference between this embodiment and specific embodiment one is that ZnSO in the deposition solution in step one 4 The concentration is 25g / L, In 2 (SO 4 ) 3 The concentration is 5g / L, Na 2 SO 4 The concentration of EDTA is 15g / L, the concentration of EDTA is 40g / L, the concentration of citric acid is 5g / L, and the pH is 5. Others are the same as in the first embodiment.

[0024] In this embodiment, by adding Na 2 SO 4 , improve the conductivity of the deposition solution, and increase the cathode polarization, so that the electrochemical co-deposition occurs smoothly, and the powdered zinc-indium alloy is obtained.

specific Embodiment approach 3

[0025] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the mass percent purity of the high-purity zinc plate described in step 2 is greater than 99.99%. Others are the same as in the first or second embodiment.

[0026] The high-purity zinc plate of this embodiment is used as a sacrificial anode.

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Abstract

The invention provides a method for preparing zinc-indium alloy powder by electrochemical co-deposition, and relates to a preparation method of zinc-indium alloy powder. The method for preparing the zinc-indium alloy powder by the electrochemical co-deposition aims at solving the technical problem of non-uniform distribution of indium in a zinc anode of a zinc-silver oxide cell. The method comprises the steps of 1, preparing a deposition solution through ZnSO4, In2(SO4)3, Na2SO4, EDTA and citric acid; 2, building a deposition system by treating a copper sheet as a negative electrode and a high-purity zinc sheet as a positive electrode; 3, depositing under a constant current condition; and 4, drying the powder obtained on the copper sheet in vacuum to obtain the zinc-indium alloy powder. The zinc-indium alloy powder is of a branch structure; indium is uniformly distributed; and the zinc-indium alloy powder can be used for preparing the zinc-silver oxide cell.

Description

technical field [0001] The invention relates to a preparation method of zinc-indium alloy powder. Background technique [0002] Zinc-silver oxide battery is a chemical power source with high specific energy and power density. It has the advantages of stable discharge voltage, good safety, non-toxic and harmless, etc. It is used in civil and national defense and aerospace fields. However, the cycle performance of the zinc-silver oxide battery limits its application field. The stability of the zinc electrode has an important impact on the cycle performance of the zinc-silver oxide battery. The zinc electrode will deform and branch when the zinc negative electrode is in the alkaline electrolyte. Crystal, self-corrosion of zinc electrode, passivation of zinc electrode, these problems will affect the capacity and cycle life of the battery, in order to solve these problems of zinc electrode, the method of using additives usually, these additives include: metal (mercury, lead, tin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/56C25C5/02
CPCC25C5/02
Inventor 姜再兴邱胜友
Owner HARBIN INST OF TECH