回流法制备三维纳米花NiAl-LDH固态超级电容器储能特性  

Energy Storage Characteristics of Solid-State Supercapacitors with Three-Dimensional Nanoflower NiAl-LDH Prepared by Reflux Method

作　　者：韩玉相 闫欣雨 毛喜玲 要凯华 侯江锦 金丽 李孟委[1,2] HAN Yuxiang;YAN Xinyu;MAO Xiling;YAO Kaihua;HOU Jiangjin;JIN Li;LI Mengwei(School of Instrument and Electronics,North University of China,Taiyuan Shanxi 030051,China;Academy for Advanced Interdisciplinary Research,North University of China,Taiyuan Shanxi 030051,China)

机构地区：[1]中北大学仪器与电子学院,山西太原030051 [2]中北大学前沿交叉科学研究院,山西太原030051

出　　处：《当代化工》2025年第3期575-581,共7页Contemporary Chemical Industry

基　　金：山西省基础研究计划项目(项目编号:202203021212149)。

摘　　要：针对目前水热等合成方法制备超级电容器电极材料所面临的产率低、制备条件要求高等问题,采用一种简单、高效的回流法制备三维纳米结构的绣球花状NiAl-LDH电极材料成为新的途径。通过不断优化反应时间和温度来调控NiAl-LDH的层状结构,从而获得高比容量的电极材料。使用SEM、XRD、CV、GCD、EIS等对电极材料进行表征及电化学性能分析。结果表明:在90℃、18 h条件下成功合成三维纳米绣球花状NiAl-LDH材料,当电流密度为1 A·g^(-1)时,其比容量高达1744.83 F·g^(-1)。以NiAl-LDH//PVA-KOH//ZnAl-LDH组装的器件在1 A·g^(-1)的电流密度下比容量达到278.53 F·g^(-1),在500次循环后库伦效率仍能达到89%,说明其具有良好的循环稳定性。在1 A·g^(-1)电流密度下,对器件施加外力使其在不同弯曲角度下进行测试,充放电曲线没有明显衰减,说明其具有良好的力学稳定性。最后将组装的器件串联成功驱动柔性LED工作。这表明回流法制备的电极材料具有很好的应用前景。In view of the problems currently faced by the synthesis methods such as hydrothermal synthesis in the preparation of electrode materials for supercapacitors,such as low yield and high requirements for preparation conditions,adopting a simple and efficient reflux method to prepare the hydrangea-like NiAl-LDH electrode materials with three-dimensional nanostructures has become a new approach.The layered structure of NiAl-LDH was regulated by continuously optimizing the reaction time and temperature,so as to obtain electrode materials with high specific capacitance.Meanwhile,the electrode materials were characterized and analyzed for electrochemical performance by means of SEM,XRD,CV,GCD,EIS,etc.The results showed that the three-dimensional nano-hydrangea-like NiAl-LDH material was successfully synthesized under the conditions of 90℃and 18 h,and its specific capacity was as high as 1744.83 F·g^(-1)when the current density was 1 A·g^(-1).The device assembled with NiAl-LDH//PVA-KOH//ZnAl-LDH had a specific capacity of 278.53 F·g^(-1)at a current density of 1 A·g^(-1),and the Coulombic efficiency could still reach 89%after 500 cycles,indicating its good cycling stability.At a current density of 1 A·g^(-1),an external force was applied to the device to conduct tests at different bending angles.The charge-discharge curves did not show significant attenuation,indicating that it had good mechanical stability.Finally,the assembled devices were successfully connected in series to drive the flexible LED to work.It suggested that the electrode materials prepared by the reflux method have excellent application prospects for the preparation of electrode materials for supercapacitors.

关 键 词：水热 回流法 纳米结构 绣球花状 电化学 NiAl-LDH 超级电容器 

分 类 号：TQ035[化学工程]