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Intercalation of sulfate anions into a Zn-Al layered double hydroxide: their synthesis and application in Zn-Ni secondary batteries

机译:将硫酸根阴离子嵌入到Zn-Al分层双氢氧化物中:它们在Zn-Ni二次电池中的合成和应用

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摘要

ZnAl-SO4-LDH was prepared via an anion-exchange process using ZnAl-CO3-LDH as a precursor. Based on the analysis for the main characteristic peaks and intensity of the Fourier transform infrared (FT-IR) spectra, CO32- was successfully replaced with SO42-. The powder X-ray diffraction (XRD) patterns indicated that all the products were well-crystallized and the scanning electron microscopy (SEM) images showed the clear layered structure of ZnAl-SO4-LDH. This means during the anion exchange process, the framework of LDH was not affected. The electrochemical performance of ZnAl-SO4-LDH was examined by galvanostatic cycling and cyclic voltammetry (CV) measurements, and the results demonstrate a novel active material ZnAl-SO4-LDH for nickel-zinc secondary batteries with remarkable properties, including higher electrochemical activity than ZnAl-CO3-LDH and desirable cycling stability over 200 cycles (retention rate 93.2%).
机译:通过使用Znal-Co3-LDH作为前体的阴离子交换方法制备ZNAL-SO4-LDH。 基于傅里叶变换红外(FT-IR)光谱的主要特征峰和强度的分析,CO32 - 已成功用SO42替换。 粉末X射线衍射(XRD)图案表明所有产物均匀结晶,扫描电子显微镜(SEM)图像显示ZNAL-SO4-LDH的透明分层结构。 这意味着在阴离子交换过程中,LDH的框架不受影响。 通过GALVANOTATIC循环和循环伏安法(CV)测量检查ZNAL-SO4-LDH的电化学性能,结果表明了一种用于镍 - 锌二次电池的新型活性物质ZNAL-SO4-LDH,具有显着性质,包括更高的电化学活性 ZNAL-CO3-LDH和期望的循环稳定性超过200次循环(保留率为93.2%)。

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  • 来源
    《RSC Advances》 |2016年第73期|共8页
  • 作者

    Liu Yanzhen; Yang Zhanhong;

  • 作者单位

    Cent S Univ Coll Chem &

    Chem Engn Changsha 410083 Hunan Peoples R China;

    Cent S Univ Coll Chem &

    Chem Engn Changsha 410083 Hunan Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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