Scholarlink

<p>A phase-controlled strategy has been developed to engineer two-dimensional graphene oxide (GO) integrated with a three-dimensional zeolitic imidazolate framework-67 (ZIF-67)/CoCuFe for use as a high-performance anode material in supercapacitors. By employing ZIF-67 as a sacrificial template and introducing transition metals (Co, Cu, and Fe), we successfully fabricated GO/ZIF-67/CoCuFe nanostructures confined between GO layers. Careful control of the calcination steps allowed us to tune the phase composition: while a single-step treatment produced mixed-metal phases, a two-step process enabled the formation of phase-pure CoCuFe embedded within the GO/MOF matrix. This structural confinement, resulting from limited atomic diffusion within the rhombic dodecahedral cavities of ZIF-67 wrapped in GO, proved crucial for achieving optimized electrochemical performance. The resulting composite electrodes exhibited remarkable capacitance, long-term cycling stability, and high Columbic efficiency. Furthermore, we assembled an all-solid-state asymmetric supercapacitor device using our GO/ZIF-67/CoCuFe as the positive electrode and hydrothermally derived GO as the negative electrode, which delivered outstanding energy and power densities alongside stable cycling behavior. These findings underscore the effectiveness of our synthetic approach for designing practical and scalable supercapacitor systems.</p> Graphical Abstract <p></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

Graphene oxide/ zeolitic imidazolate framework-67–transition metal composite with exposed active sites for high-performance supercapacitors

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年6月2日

查看全文
  • Elham Mazaheri,
  • Ahmad Gholizadeh

摘要

A phase-controlled strategy has been developed to engineer two-dimensional graphene oxide (GO) integrated with a three-dimensional zeolitic imidazolate framework-67 (ZIF-67)/CoCuFe for use as a high-performance anode material in supercapacitors. By employing ZIF-67 as a sacrificial template and introducing transition metals (Co, Cu, and Fe), we successfully fabricated GO/ZIF-67/CoCuFe nanostructures confined between GO layers. Careful control of the calcination steps allowed us to tune the phase composition: while a single-step treatment produced mixed-metal phases, a two-step process enabled the formation of phase-pure CoCuFe embedded within the GO/MOF matrix. This structural confinement, resulting from limited atomic diffusion within the rhombic dodecahedral cavities of ZIF-67 wrapped in GO, proved crucial for achieving optimized electrochemical performance. The resulting composite electrodes exhibited remarkable capacitance, long-term cycling stability, and high Columbic efficiency. Furthermore, we assembled an all-solid-state asymmetric supercapacitor device using our GO/ZIF-67/CoCuFe as the positive electrode and hydrothermally derived GO as the negative electrode, which delivered outstanding energy and power densities alongside stable cycling behavior. These findings underscore the effectiveness of our synthetic approach for designing practical and scalable supercapacitor systems.

Graphical Abstract