| Zn?In LDHs在Zn?Ni二次电池中的电化学性能 |
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| 作者姓名： | 屈亚松 俞小花 谢刚 史春阳 杨亚刚 李永刚 |
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| 作者单位： | 1.昆明理工大学冶金与能源工程学院，昆明 650093 |
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| 基金项目： | 国家自然科学基金资助项目（51774160）；云南省万人计划资助项目（YNWR-QNBJ-2018-327） |
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| 摘 要： | 采用水热法制备Zn?In LDHs，并且将其作为锌镍二次电池的新型负极材料。利用扫描电镜（SEM）和X射线衍射仪（XRD）对制备的Zn?In LDHs进行了形态和微观结构的分析。通过循环伏安（CV）、Tafel极化曲线和恒电流充电放电测试研究了Zn?In LDHs作为锌镍电池负极材料的电化学性能。形貌表征发现制备的Zn?In LDHs呈现出六边形片状结构，电化学性能研究结果表明Zn?In LDHs应用到Zn–Ni二次电池中具有很好的循环可逆性能和抗腐蚀性能，恒电流充电放电测试结果分析可知，Zn?In LDHs电极表现出了较为优异的循环稳定性以及充放电特性。经过100次循环后，循环保持率可以达到92.25%。
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| 关 键 词： | Zn?In LDHs 锌镍二次电池 循环伏安法 Tafel极化曲线 循环稳定性 充放电特性 |
| 收稿时间： | 2019-12-25 |
Electrochemical properties of Zn–In LDHs in Zn–Ni secondary batteries |
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| Affiliation: | 1.Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China2.Kunming Metallurgical Research Institute Co. Ltd., Kunming 650503, China3.State Key Laboratory of Common Associated Non-ferrous Metal Resources Pressure Hydrometallurgy Technology, Kunming 650503, China4.Yunnan Copper Technology Development Co. Ltd., Kunming 650101, China |
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| Abstract: | Although zinc–nickel (Zn–Ni) secondary batteries have numerous advantages, these have not been widely used in practice. The main reason is that problems such as the formation of dendritic zinc, corrosion, and passivation are encountered in the use of zinc anode. These problems restrict the development of Zn–Ni secondary battery using zinc electrode. To improve the electrochemical properties of zinc anode, researchers are constantly looking for new materials to be applied to Zn–Ni secondary batteries. Recently, many studies on the modification of zinc oxide and the electrochemical properties of calcium zincate have been conducted. The improvement measures can effectively enhance the corrosion resistance and cycle stability of Zn–Ni secondary batteries, but the improvements are not up to expectations. Therefore, researchers have now focused their attention on the research and development of new materials. The unique properties of hydrotalcite have attracted the attention of researchers. Hydrotalcite has shown excellent performance in electrocatalysis, medicine, nanofillers, and other functional fields. Moreover, because hydrotalcite has high stability in alkaline solution, hydrotalcite may become a new material for alkaline batteries. Presently, hydrotalcite, as a new kind of B-type material, has been used in alkaline secondary batteries; the performance of these batteries is excellent. The introduction of Zn–Al LDHs effectively improves the electrochemical properties of Zn–Ni secondary batteries. Therefore, this study proposes the application of Zn–In LDHs to Zn–Ni secondary batteries for the first time to analyze its electrochemical properties. Zn–In LDHs were prepared via the hydrothermal method and used as a new anode material for Zn–Ni secondary batteries. The morphology and microstructure of Zn–In LDHs were analyzed via scanning electron microscopy and X-ray diffraction, respectively. The electrochemical properties of Zn–In LDHs as anode material for Zn–Ni batteries were investigated via cyclic voltammetry, Tafel extrapolation of polarization curves, and galvanostatic charge–discharge test. The morphology of Zn–In LDHs shows a hexagonal structure. The electrical properties of Zn–In LDHs show that they have good cycle reversibility and corrosion resistance when Zn–In LDHs are applied to Zn–Ni secondary batteries. The analysis of the constant current charge–discharge test results shows that Zn–In LDHs have excellent cycle stability and charge–discharge characteristics. After 100 cycles, the cycle retention rate can reach values of up to 92.25%. |
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