| Title |
Enhanced Pseudocapacitance and Supercapacitor Performance with Amorphous Cu(OH)2/ZIF-67 Composite |
| Authors |
김인태(In Tae Kim) ; 이성준(Sung Jun Lee) ; 박서현(Seo Hyun Park) ; 이승훈(Seung Hun Lee) ; 채문석(Munseok S. Chae) ; 박희정(Hee Jung Park) ; 김치호(Chiho Kim) ; 이우재(Woo-Jae Lee) ; 박유세(Yoo Sei Park) |
| DOI |
https://doi.org/10.3365/KJMM.2025.63.11.913 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Supercapacitor; Pseudocapacitor; MOF; Metal support template; Energy storage |
| Abstract |
To address the intermittent nature of renewable energy, highly efficient high-performance energy
storage devices are essential. Among various options, supercapacitors have attracted significant attention
because they provide high power density, rapid charge?discharge capability, and long cycle life. In this study,
a composite of amorphous Cu(OH)2 grown on a metal?organic framework ZIF-67 (Cu(OH)2@ZIF-67) was
successfully synthesized via a facile solvothermal method. Detailed structural and surface analyses, including
scanning and transmission electron microscopy as well as X-ray diffraction measurements, revealed that
ultrathin Cu(OH)2 nanosheets were uniformly grown on the ZIF-67 surface. The combination of the
amorphous phase with the MOF provided abundant electrochemically active sites and facilitated rapid ion
transport, significantly contributing to greatly improved charge storage behavior. Electrochemical
characterization demonstrated that Cu(OH)2@ZIF-67 exhibited a specific capacitance of 168 F/g at 3 A/g,
approximately four times higher than that of
pristine ZIF-67, while maintaining superior
energy density across a wide power range. These
findings demonstrate that introducing an
amorphous structure onto MOF-derived metal
supports not only effectively enhances the overall
performance of supercapacitors but also provides valuable insights for the rational design, optimization, and potential practical and technological applications
of hybrid electrode materials in next-generation high-performance energy storage systems. |