Premium
Covalently Aligned Molybdenum Disulfide–Carbon Nanotubes Heteroarchitecture for High‐Performance Electrochemical Capacitors
Author(s) -
Wu Xingjiang,
Zhu Xiaolin,
Tao Houyu,
Wu Guan,
Xu Jianhong,
Bao Ningzhong
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202107734
Subject(s) - molybdenum disulfide , materials science , carbon nanotube , electrochemistry , covalent bond , electrolyte , capacitor , nanotechnology , capacitance , chemical engineering , energy storage , electrode , chemistry , composite material , voltage , organic chemistry , power (physics) , electrical engineering , physics , engineering , quantum mechanics
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 (MoS 2 ‐CNTs) in which CNTs are vertically grafted within a MoS 2 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 MoS 2 ‐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.