Wood-Derived, Conductivity and Hierarchical Pore Integrated Thick Electrode Enabling High Areal/Volumetric Energy Density for Hybrid Capacitors

Cited 2 time in webofscience Cited 0 time in scopus
  • Hit : 15
  • Download : 0
For the proliferation of the supercapacitor technology, it is essential to attain superior areal and volumetric performance. Nevertheless, maintaining stable areal/volumetric capacitance and rate capability, especially for thick electrodes, remains a fundamental challenge. Here, for the first time, a rationally designed porous monolithic electrode is reported with high thickness of 800 mu m (46.74 mg cm(-2), with high areal mass loading of NiCo2S4 6.9 mg cm(-2)) in which redox-active Ag nanoparticles and NiCo2S4 nanosheets are sequentially decorated on highly conductive wood-derived carbon (WC) substrates. The hierarchically assembled WC@Ag@NiCo2S4 electrode exhibits outstanding areal capacitance of 6.09 F cm(-2) and long-term stability of 84.5% up to 10 000 cycles, as well as exceptional rate capability at 50 mA cm(-2). The asymmetric cell with an anode of WC@Ag and a cathode of WC@Ag@NiCo2S4 delivers areal/volumetric energy density of 0.59 mWh cm(-2)/3.93 mWh cm(-3), which is much-improved performance compared to those of most reported thick electrodes at the same scale. Theoretical calculations verify that the enhanced performance could be attributed to the decreased adsorption energy of OH- and the down-shifted d-band of Ag atoms, which can accelerate the electron transport and ion transfer.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2021-09
Language
English
Article Type
Article
Citation

SMALL, v.17, no.35, pp.2102532

ISSN
1613-6810
DOI
10.1002/smll.202102532
URI
http://hdl.handle.net/10203/287806
Appears in Collection
MS-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 2 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0