Synthesis of mesoporous spherical TiO2 and its application in negative electrode of hybrid supercapacitor

Min Young Cho, Sun Min Park, Kwang Bum Kim, Kwang Chul Roh

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

To fabricate a hybrid supercapacitor comprising activated carbon and TiO2 electrodes, anatase TiO2 was investigated as a candidate negative electrode material. It was synthesized by a combination of the sol-gel and microwave methods using dodecylamine as a structure directing agent. The synthesized TiO2 had uniform size (~400 nm), a spherical morphology, a mesoporous structure (specific surface area = ~100 m2g-1, pore size distribution = ~10 nm), and anatase phase without any impurities. To balance the power and energy densities of positive (activated carbon) and negative electrodes (TiO2), each electrode was confirmed to have the specific capacity of about 190 mAh g-1 and 50 mAh g-1 (at 1 C-rate = 250 mA g-1) through half cell tests. While the specific capacitance (23 F cm-3) of the hybrid supercapacitor achieved about 28% increase compared to an existing supercapacitor (electric double-layer capacitor = 18 F cm-3) at a current density of 0.5 mA cm-2, it had a low retention ratio of 91% during 100 cycles due to the poor electronic conductivity of TiO2. However, it was confirmed that anatase TiO2 is suitable for use as a negative material in hybrid supercapacitors.

Original languageEnglish
Pages (from-to)809-812
Number of pages4
JournalElectronic Materials Letters
Volume9
Issue number6
DOIs
Publication statusPublished - 2013 Nov 1

Fingerprint

Electrodes
Titanium dioxide
Activated carbon
Specific surface area
Pore size
Sol-gels
Capacitance
Current density
Microwaves
Supercapacitor
Impurities
titanium dioxide

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials

Cite this

@article{cc53766f45f74b6296517470d8e79ce5,
title = "Synthesis of mesoporous spherical TiO2 and its application in negative electrode of hybrid supercapacitor",
abstract = "To fabricate a hybrid supercapacitor comprising activated carbon and TiO2 electrodes, anatase TiO2 was investigated as a candidate negative electrode material. It was synthesized by a combination of the sol-gel and microwave methods using dodecylamine as a structure directing agent. The synthesized TiO2 had uniform size (~400 nm), a spherical morphology, a mesoporous structure (specific surface area = ~100 m2g-1, pore size distribution = ~10 nm), and anatase phase without any impurities. To balance the power and energy densities of positive (activated carbon) and negative electrodes (TiO2), each electrode was confirmed to have the specific capacity of about 190 mAh g-1 and 50 mAh g-1 (at 1 C-rate = 250 mA g-1) through half cell tests. While the specific capacitance (23 F cm-3) of the hybrid supercapacitor achieved about 28{\%} increase compared to an existing supercapacitor (electric double-layer capacitor = 18 F cm-3) at a current density of 0.5 mA cm-2, it had a low retention ratio of 91{\%} during 100 cycles due to the poor electronic conductivity of TiO2. However, it was confirmed that anatase TiO2 is suitable for use as a negative material in hybrid supercapacitors.",
author = "Cho, {Min Young} and Park, {Sun Min} and Kim, {Kwang Bum} and Roh, {Kwang Chul}",
year = "2013",
month = "11",
day = "1",
doi = "10.1007/s13391-013-6017-3",
language = "English",
volume = "9",
pages = "809--812",
journal = "Electronic Materials Letters",
issn = "1738-8090",
publisher = "Springer Netherlands",
number = "6",

}

Synthesis of mesoporous spherical TiO2 and its application in negative electrode of hybrid supercapacitor. / Cho, Min Young; Park, Sun Min; Kim, Kwang Bum; Roh, Kwang Chul.

In: Electronic Materials Letters, Vol. 9, No. 6, 01.11.2013, p. 809-812.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Synthesis of mesoporous spherical TiO2 and its application in negative electrode of hybrid supercapacitor

AU - Cho, Min Young

AU - Park, Sun Min

AU - Kim, Kwang Bum

AU - Roh, Kwang Chul

PY - 2013/11/1

Y1 - 2013/11/1

N2 - To fabricate a hybrid supercapacitor comprising activated carbon and TiO2 electrodes, anatase TiO2 was investigated as a candidate negative electrode material. It was synthesized by a combination of the sol-gel and microwave methods using dodecylamine as a structure directing agent. The synthesized TiO2 had uniform size (~400 nm), a spherical morphology, a mesoporous structure (specific surface area = ~100 m2g-1, pore size distribution = ~10 nm), and anatase phase without any impurities. To balance the power and energy densities of positive (activated carbon) and negative electrodes (TiO2), each electrode was confirmed to have the specific capacity of about 190 mAh g-1 and 50 mAh g-1 (at 1 C-rate = 250 mA g-1) through half cell tests. While the specific capacitance (23 F cm-3) of the hybrid supercapacitor achieved about 28% increase compared to an existing supercapacitor (electric double-layer capacitor = 18 F cm-3) at a current density of 0.5 mA cm-2, it had a low retention ratio of 91% during 100 cycles due to the poor electronic conductivity of TiO2. However, it was confirmed that anatase TiO2 is suitable for use as a negative material in hybrid supercapacitors.

AB - To fabricate a hybrid supercapacitor comprising activated carbon and TiO2 electrodes, anatase TiO2 was investigated as a candidate negative electrode material. It was synthesized by a combination of the sol-gel and microwave methods using dodecylamine as a structure directing agent. The synthesized TiO2 had uniform size (~400 nm), a spherical morphology, a mesoporous structure (specific surface area = ~100 m2g-1, pore size distribution = ~10 nm), and anatase phase without any impurities. To balance the power and energy densities of positive (activated carbon) and negative electrodes (TiO2), each electrode was confirmed to have the specific capacity of about 190 mAh g-1 and 50 mAh g-1 (at 1 C-rate = 250 mA g-1) through half cell tests. While the specific capacitance (23 F cm-3) of the hybrid supercapacitor achieved about 28% increase compared to an existing supercapacitor (electric double-layer capacitor = 18 F cm-3) at a current density of 0.5 mA cm-2, it had a low retention ratio of 91% during 100 cycles due to the poor electronic conductivity of TiO2. However, it was confirmed that anatase TiO2 is suitable for use as a negative material in hybrid supercapacitors.

UR - http://www.scopus.com/inward/record.url?scp=84887963321&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84887963321&partnerID=8YFLogxK

U2 - 10.1007/s13391-013-6017-3

DO - 10.1007/s13391-013-6017-3

M3 - Article

AN - SCOPUS:84887963321

VL - 9

SP - 809

EP - 812

JO - Electronic Materials Letters

JF - Electronic Materials Letters

SN - 1738-8090

IS - 6

ER -