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Ionothermal Synthesis of Carbon/TiO2 Nanocomposite for Supercapacitors

Journal Article · · ChemNanoMat
 [1];  [2];  [3];  [2];  [2];  [3];  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States)
+ Show Author Affiliations
A facile in-situ ionothermal strategy is designed to synthesize carbon/oxide composites with nanoporous structure. Ionic liquids play key roles in this ionothermal method as the solvents, porous structure directing templates and carbon sources. Here, the interaction between ionic liquids and oxides greatly improves the carbon yield of ionic liquids from nearly 0 to 18 wt.%. With the synergistic effects of the high electrical conductivity of the nitrogen-rich carbon species and the Ti3+ self-doping enhanced electrical conductivity of TiO2, C/TiO2-4 composite exhibits better electrochemical performance than C/SiO2 and C/Nb2O5 do as a supercapacitor electrode material, delivering a high specific capacitance of 152.4 F g-1 at 5 mV s-1 with good capacitance retentions of 84.7%, 72.2% and 46.0% at 30, 100 and 500 mV s-1, respectively.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1863287
Alternate ID(s):
OSTI ID: 1855613
Journal Information:
ChemNanoMat, Journal Name: ChemNanoMat Journal Issue: 4 Vol. 8; ISSN 2199-692X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
Ionic liquid
Ionothermal synthesis
Iorous material
Supercapacitor
TiO2