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Synthesis of rose-like ZnAl-LDH and its application in zinc-nickel secondary battery

机译：玫瑰般ZNAL-LDH的合成及其在锌镍二次电池中的应用

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摘要

Rose-like zinc-aluminum hydrotalcite (ZnAl-LDH) was synthesized in an organic/water mixed solvent system by a simple hydrothermal method and applied to zinc-nickel secondary battery, and its electrochemical performance as a negative electrode active material was also studied. Rose-like ZnAl-LDH has the characteristic diffraction peaks of ZnAl-LDH. SEM and TEM results show that the rose-like ZnAl-LDH was assembled by LDH nanosheets with the center as the axis and inclined at certain angles to form a rose-like structure. Through cyclic voltammetry, EIS and galvanostatic charge and discharge tests, rose-like ZnAl-LDH is superior to the coprecipitation synthesized flake-like ZnAl-LDH in cycle stability and discharge capacity. The initial discharge specific capacity of rose-like ZnAl-LDH is 363.4 mAh g(-1), after 1250 cycles, the specific discharge capacity was 366.848 mAh g(-1), the average discharge specific capacity was 392.455 mAh g(-1) during the entire charge/discharge process. The results show that the rose-like ZnAl-LDH is a promising material with good cycle stability and high specific discharge capacity for energy storage devices.
机译：通过简单的水热法在有机/水混合溶剂体系中合成玫瑰锌 - 铝水石（ZNAL-LDH）并施加到锌 - 镍二次电池中，并且还研究了作为负极活性物质的电化学性能。玫瑰般的Znal-LDH具有Znal-LDH的特征衍射峰。 SEM和TEM结果表明，玫瑰状ZNAL-LDH由LDH纳米片组装，其中LDH纳米电池用中心作为轴线，并以某种角度倾斜以形成玫瑰状结构。通过循环伏安法，EIS和Galvanostatic电荷和放电测试，玫瑰状的ZNAL-LDH优于循环稳定性和放电容量的共沉淀合成的片状ZNAL-LDH。玫瑰类ZNAL-LDH的初始排放特异性容量为363.4mahg（-1），在1250次循环后，特定放电容量为366.848mahg（-1），平均放电比容量为392.455mahg（-1 ）在整个充电/放电过程中。结果表明，玫瑰状的Znal-LDH是一种有希望的材料，具有良好的循环稳定性和能量存储装置的高特定放电容量。

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  • 来源
    《Nanotechnology》 |2019年第1期|共9页
  • 作者

    Chen Xi; Yang Zhanhong; Wang Limin; Qin Haigang;

  • 作者单位

    Cent S Univ Coll Chem &

    Chem Engn Hunan Prov Key Lab Chem Power Source Changsha 410083 Hunan Peoples R China;

    Cent S Univ Coll Chem &

    Chem Engn Hunan Prov Key Lab Chem Power Source Changsha 410083 Hunan Peoples R China;

    Cent S Univ Coll Chem &

    Chem Engn Hunan Prov Key Lab Chem Power Source Changsha 410083 Hunan Peoples R China;

    Cent S Univ Coll Chem &

    Chem Engn Hunan Prov Key Lab Chem Power Source Changsha 410083 Hunan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    ZnAl-LDH; rose-like structure; zinc-nickel secondary battery; cycle performance;

    机译：Znal-LDH;玫瑰般的结构;锌 - 镍二次电池;循环性能;

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