| ZOU Zhongli,LI Yang,SHAN Xichang,MI Zhijuan,ZHANG Xu.Effect of Surfactants on Properties of Electroplated Zinc-indium Alloy[J],54(2):137-147 |
| Effect of Surfactants on Properties of Electroplated Zinc-indium Alloy |
| Received:March 05, 2024 Revised:May 28, 2024 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2025.02.011 |
| KeyWord:Zn-In alloy surfactant response surface method constant current deposition corrosion resistance |
| Author | Institution |
| ZOU Zhongli |
School of Materials Science and Engineering, North Minzu University, Yinchuan , China |
| LI Yang |
School of Materials Science and Engineering, North Minzu University, Yinchuan , China |
| SHAN Xichang |
School of Materials Science and Engineering, North Minzu University, Yinchuan , China |
| MI Zhijuan |
School of Materials Science and Engineering, North Minzu University, Yinchuan , China |
| ZHANG Xu |
School of Materials Science and Engineering, North Minzu University, Yinchuan , China |
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| Abstract: |
| The metal zinc is currently the most commonly used anode material in aqueous zinc-ion batteries, due to its advantages of being environmentally friendly, having a large capacity, and low cost. However, it has some drawbacks such as hydrogen evolution, dendrite formation, and susceptibility to corrosion during charge-discharge processes. In this study, a layer of zinc-indium alloy was deposited on the surface of metallic zinc. On one hand, the high hydrogen evolution overpotential of indium effectively suppresses the hydrogen evolution reaction; and on the other hand, it improves the corrosion resistance and mechanical properties of the negative electrode material. The work aims to investigate the effect of surfactants on the quality of electroplated zinc-indium coatings. The effect of addition of surfactants cetyltrimethyl ammonium bromide (CTAB) and polyethylene glycol 2000 (PEG) on the corrosion resistance of electrogalvanized indium was investigated by single factor experiment. On this basis, the two-factor five-level central composite design method (CCD) was used to design experiments, and the quadratic response surface models of charge transfer resistance Rf and polarization resistance Rp were established through experiments and variance analysis. The optimal ratio of CTAB 0.33 g/L and PEG 0.87 g/L were finally obtained. The hydrogen evolution behavior, hardness, surface wettability, surface morphology, elements and phase composition of Zinc-indium alloy coatings were characterized by linear potential scanning, Vickers microhardness tester, contact angle tester, SEM, EDS and XRD, respectively. The experimental results showed that the cathode polarization curve changed obviously with the addition of the composite surfactant. Compared with the hydrogen evolution potential of pure Zn (−1.833 V), the hydrogen evolution potential of the two Zinc-indium alloys had an obvious negative shift. The Zinc-indium alloy prepared without additives had a potential of −1.985 V, while the Zinc-indium alloy prepared with surfactants had a more negative potential (−2.053 V). It showed that the coating obtained by the composite surfactant could inhibit the hydrogen evolution reaction. The contact angle test results showed that the surface wetting angle of the prepared coating was 56° compared with that of the coating without additives, and the surface wetting angle of the optimized coating was only 25°. The zinc-indium coating had better hydrophilic properties and higher hardness than the metal zinc coating. SEM test results showed that the composite surfactant could effectively improve the grain growth on the surface of the coating, which was more irregular, solving the coarse grain problems, and the coating after addition was relatively uniform and fine. The test results showed that the main elements of the coating were Zn, In, C and O, and the coating composition was not affected by the addition of surfactant before and after the plating solution. The coating was mainly composed of zinc and indium. XRD results showed that the peak strength and peak width of the coating prepared by adding surfactant were smaller and wider than those without adding surfactant. This showed that the grain size of the coating with additive was smaller than that without additive, and the growth crystal surface of metal indium was mainly distributed in the (101) and (102) crystal faces. |
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