Scholarlink

<p>Lanthanide-based perovskite materials are prized for their potential in supercapacitor applications. This study synthesized a series of La<sub>1−<i>x</i></sub>Sr<sub><i>x</i></sub>CoO<sub>3</sub> (<i>x</i>&#xa0;=&#xa0;0, 0.1, 0.15, and 0.2) materials employing the sol–gel method by doping divalent strontium ions at the A site. The microstructure, morphology, and electrochemical properties of these samples were characterized via x-ray diffraction, scanning electron microscopy, transmission electron microscopy, Brunauer–Emmett–Teller surface area measurements, cyclic voltammetry, galvanostatic charge/discharge cycling, and electrochemical impedance spectroscopy. Among the samples, La<sub>0.85</sub>Sr<sub>0.15</sub>CoO<sub>3</sub> exhibited the lowest charge-transfer resistance and the largest specific surface area. At a current density of 1 A/g, La<sub>0.85</sub>Sr<sub>0.15</sub>CoO<sub>3</sub> achieved a maximum specific capacitance of 212.4 F/g, representing a considerable improvement of approximately 2.53-fold over the LaCoO<sub>3</sub> sample (84 F/g). Further, the charge storage mechanism of oxygen anions was investigated during the charging and discharging processes. The results demonstrated that substituting Sr at the A site of compounds holds considerable potential in supercapacitor applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of Sr Doping at the A Site on the Electrochemical Properties of LaCoO3 Used for Supercapacitor Applications

  • 期刊论文

  • 发表日期：

    2025年3月19日

查看全文
  • Jingchen Qu,
  • Xu Guo,
  • Zixuan Tian,
  • Honglei Wang,
  • Xin Ye,
  • Lei Wang,
  • Songtao Dong

摘要

Lanthanide-based perovskite materials are prized for their potential in supercapacitor applications. This study synthesized a series of La1−xSrxCoO3 (x = 0, 0.1, 0.15, and 0.2) materials employing the sol–gel method by doping divalent strontium ions at the A site. The microstructure, morphology, and electrochemical properties of these samples were characterized via x-ray diffraction, scanning electron microscopy, transmission electron microscopy, Brunauer–Emmett–Teller surface area measurements, cyclic voltammetry, galvanostatic charge/discharge cycling, and electrochemical impedance spectroscopy. Among the samples, La0.85Sr0.15CoO3 exhibited the lowest charge-transfer resistance and the largest specific surface area. At a current density of 1 A/g, La0.85Sr0.15CoO3 achieved a maximum specific capacitance of 212.4 F/g, representing a considerable improvement of approximately 2.53-fold over the LaCoO3 sample (84 F/g). Further, the charge storage mechanism of oxygen anions was investigated during the charging and discharging processes. The results demonstrated that substituting Sr at the A site of compounds holds considerable potential in supercapacitor applications.