Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 16, Issue 7, Pages 845-849Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.202100087
Keywords
core-shell; layered double hydroxide; metal organic framework; multi-porosity; supercapacitor
Categories
Funding
- Program for the National Natural Science Foundation of China [U1904215, 21673203, 21201010, NSFC-21901221, 21671170]
- Natural Science Foundation of Jiangsu Province [BK20190870]
- Six Talent Peaks Project of Jiangsu Province
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Designing nanocomposites with good electrochemical properties is a challenge for constructing supercapacitors. In this study, a series of core-shell structures with a macro-microporous core and layered shell were successfully synthesized, showing high specific capacitance and rate retention. The sample of M-ZIF-67@LDH4 exhibited a specific capacitance of 597.6 F g(-1) at 0.5 A g(-1) and a high rate retention of 92% at 3 A g(-1).
Designing nanocomposites with good electrochemical properties is one of the challenges in constructing supercapacitors. Adjustable metal-organic frameworks (MOFs) have potential research value in improving charge storage and transfer due to their multi-porosity. Moreover, MOFs can serve as a precursor to various derivatives. Herein, a series of core-shell structures with macro-microporous ZIF-67 (M-ZIF-67) as the core and layered double hydroxide (LDH) as the shell were synthesized based on polystyrene spheres (PSs) template via a simple ion etching method. As a result, the sample of M-ZIF-67@LDH4 shows a specific capacitance of 597.6 F g(-1) at 0.5 A g(-1) and a high rate retention of 92% at 3 A g(-1).
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