Improved asymmetric electrochemical capacitor using Zn-Co co-doped Ni(OH)(2) positive electrode material

The performance of Ni-foam pasted Ni(OH)(2) prepared from co-precipitated Ni(OH)(2) with Zinc (Zn) and Cobalt (Co) as the positive electrode active material of an asymmetric electrochemical capacitor (EC) is studied for the enhancement of the capacitor's specific energy and power densities. A co-precipitated Ni(OH)(2)/activated carbon (AC) composite material and AC were used as a positive and negative electrode material. The AC in the positive electrode is used as an electrolyte reservoir to reduce ionic diffusion resistance regardless of charge/discharge current density. In addition, the simultaneous presence of Zn and Co ions in the Ni(OH)(2) layer improves the efficiency of the active material and reduces the resistance of the unit cell. It was observed that through the effects of the additives in the positive electrode, the asymmetric EC exhibits a high energy density with 35.7 Wh/kg, based on the active material. Furthermore, the energy density decreasing behavior at a high discharge current density was retarded.
Publisher
SPRINGER
Issue Date
2006-03
Language
ENG
Keywords

CARBON COMPOSITE ELECTRODE; DOUBLE-LAYER CAPACITOR; NICKEL ELECTRODES; COBALT ADDITION; HYDROXIDE; PERFORMANCE; MORPHOLOGY; BATTERIES

Citation

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, v.82, no.4, pp.593 - 597

ISSN
0947-8396
DOI
10.1007/s00339-005-3400-4
URI
http://hdl.handle.net/10203/4430
Appears in Collection
CBE-Journal Papers(저널논문)
  • Hit : 571
  • Download : 2
  • Cited 0 times in thomson ci
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡClick to seewebofscience_button
⊙ Cited 31 items in WoSClick to see citing articles inrecords_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0