Hierarchical Microspheres Based on alpha-Ni(OH)2 Nanosheets Intercalated with Different Anions: Synthesis, Anion Exchange, and Effect of Intercalated Anions on Electrochemical Capacitance

Cited 155 time in webofscience Cited 0 time in scopus
  • Hit : 549
  • Download : 0
Hierarchical microspheres composed of wrinkled alpha-Ni(OH)(2) nanosheets were synthesized from an aqueous solution containing nickel salts, hexamethylenetetramine, 1-butanol, and dodecyl sulfate. The exchange of intercalated dodecyl sulfate anions within the microspheres by smaller anions (Cl-, NO3-, OAc-, and SO42-) resulted in retention of morphology. A possible growth mechanism is proposed based on the observation of the effects the parameter variation (different nickel and hydroxide sources, several alcohols, with and without dodecyl sulfate as well as 1-butanol) had on rnicrosphere formation. Electrochemical and capacitive properties of the anion-exchanged microspheres were studied by cyclic voltammetry and galvanostatic charging-discharging. Interestingly, the specific capacitance was determined by size of the intercalated anions and not by the basal spacing; for example, the largest anion, SO42-, gave the lowest specific capacitance, whereas the smallest anion, Cl-, gave the highest specific capacitance. Our data support the notion that larger anions impede the mobility of OH- ions toward the surface of Ni(OH)(2) sheets to a greater extent than smaller ions.
Publisher
AMER CHEMICAL SOC
Issue Date
2011-10
Language
English
Article Type
Article
Keywords

LAYERED DOUBLE HYDROXIDES; ALPHA-NICKEL HYDROXIDE; HYDROTHERMAL SYNTHESIS; COBALT HYDROXIDES; ZINC; NANOSTRUCTURES; SURFACTANT; BEHAVIOR; NANOCOMPOSITES; DELAMINATION

Citation

JOURNAL OF PHYSICAL CHEMISTRY C, v.115, no.39, pp.19445 - 19454

ISSN
1932-7447
URI
http://hdl.handle.net/10203/99093
Appears in Collection
CBE-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 155 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0