Ionothermal Synthesis of Carbon/TiO2 Nanocomposite for Supercapacitors

Runming Tao; Tao Wang; Juntian Fan; Harry M. Meyer; Albina Y. Borisevich; Chi Linh Do-Thanh; Sheng Dai

doi:10.1002/cnma.202200075

Ionothermal Synthesis of Carbon/TiO₂ Nanocomposite for Supercapacitors

Runming Tao, Tao Wang, Juntian Fan, Harry M. Meyer, Albina Y. Borisevich, Chi Linh Do-Thanh, Sheng Dai

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

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. 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.

Original language	English
Article number	e202200075
Journal	ChemNanoMat
Volume	8
Issue number	4
DOIs	https://doi.org/10.1002/cnma.202200075
State	Published - Apr 2022

Funding

The research at Oak Ridge National Laboratory and the University of Tennessee at Knoxville was supported by the U.S. Department of Energy's Office of Science, Office of Basic Energy Science, Division of Materials Sciences Engineering under contract No. DE‐AC05‐00OR22725. The authors thanks Dr. Guang Yang and Dr. Jagjit Nanda for the experimental support on Raman spectrometer. This manuscript has been authored by UT‐Battelle, LLC under contract No. DE‐AC05‐00OR22725 with the U.S. Department of Energy.

Funders	Funder number
U.S. Department of Energy
Office of Science
Basic Energy Sciences
Oak Ridge National Laboratory
University of Tennessee
Division of Materials Sciences and Engineering	DE‐AC05‐00OR22725

Keywords

TiO
ionic liquid
ionothermal synthesis
porous material
supercapacitor

Access to Document

10.1002/cnma.202200075

Cite this

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title = "Ionothermal Synthesis of Carbon/TiO2 Nanocomposite for Supercapacitors",

abstract = "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. 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.",

keywords = "TiO, ionic liquid, ionothermal synthesis, porous material, supercapacitor",

author = "Runming Tao and Tao Wang and Juntian Fan and Meyer, {Harry M.} and Borisevich, {Albina Y.} and Do-Thanh, {Chi Linh} and Sheng Dai",

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AU - Tao, Runming

AU - Wang, Tao

AU - Fan, Juntian

AU - Meyer, Harry M.

AU - Borisevich, Albina Y.

AU - Do-Thanh, Chi Linh

AU - Dai, Sheng

PY - 2022/4

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N2 - 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. 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.

AB - 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. 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.

KW - TiO

KW - ionic liquid

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