Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 39, Pages 21295-21303Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202107734
Keywords
electrochemical capacitors; heteroarchitectures; MoS2-CNTs; pseudocapacitance; wearable electronics
Categories
Funding
- National Natural Science Foundation of China [21706120, 22025801]
- National Postdoctoral Program for Innovative Talents [BX2021146]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Fund of State Key Laboratory of Materials-Oriented Chemical Engineering [ZK201720]
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The newly developed MoS2-CNTs structure demonstrates ultralarge capacitance and good structural stability, suitable for high-performance electrochemical capacitors.
Advanced two-dimensional nanosheets that promote the dynamic transportation and storage capacity of ions are significant for high-performance electrochemical capacitors (ECs). However, such materials often possess a low energy density. We have developed an ordered heteroarchitecture of molybdenum disulfide-carbon nanotubes (MoS2-CNTs) in which CNTs are vertically grafted within a MoS2 framework by C-Mo covalent bonds. Benefiting from this in situ vertical bridge, high-speed interlaminar conductivity, unimpeded ion-diffusion channels and sufficient pseudocapacitive reactivity, the MoS2-CNTs presents ultralarge capacitance (5485 F g(-1)) and good structural stability in potassium hydroxide electrolyte. Moreover, the all-unified solid-state flexible ECs obtained through direct-write printing construction deliver high energy density (226 mWh g(-1)), good capacitance (723 F g(-1)) and stable high/low-temperature operating ability, which can power a wearable health-monitoring device.
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