Simple size control of TiO 2 nanoparticles and their electrochemical performance: Emphasizing the contribution of the surface area to lithium storage at high-rates

Joohyun Lim, Ji Hyun Um, Kyung Jae Lee, Seung-Ho Yu, Young Jae Kim, Yung Eun Sung, Jin Kyu Lee

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The particle size effects of TiO 2 nanoparticles (TNPs), which are composed of small crystallites, on Li ion storage are a very fundamental and important subject. However, size control of TNPs under 200 nm using a sol-gel method has been limited due to the highly reactive precursor, titanium alkoxide. In this study, TNPs with various sizes even under 100 nm are obtained by controlling the reactant concentrations in a mixed solvent of ethanol and acetonitrile. Among them, three different sizes of TNPs are prepared to compare the Li ion storage capacity, and 60 nm TNPs are found to have the best reversible capacity of 182 mA h g -1 after 50 cycles at 1 C and a remarkable rate performance of 120 mA h g -1 at 10 C. Capacity increase upon cycling is observed in the size-controlled TNPs, and the explanation of this phenomenon is proposed to the lattice volume expansion of TiO 2 upon intercalation for enabling further penetration of the electrolyte into the particles' interior. Moreover, the capacity at high rates is more closely related to the surface area from Hg porosimetry analysis than from typical N 2 adsorption/desorption analysis.

Original languageEnglish
Pages (from-to)5688-5695
Number of pages8
JournalNanoscale
Volume8
Issue number10
DOIs
Publication statusPublished - 2016 Mar 14
Externally publishedYes

Fingerprint

Lithium
Nanoparticles
Ions
Intercalation
Titanium
Acetonitrile
Crystallites
Sol-gel process
Electrolytes
Desorption
Ethanol
Particle size
Adsorption

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Simple size control of TiO 2 nanoparticles and their electrochemical performance : Emphasizing the contribution of the surface area to lithium storage at high-rates. / Lim, Joohyun; Um, Ji Hyun; Lee, Kyung Jae; Yu, Seung-Ho; Kim, Young Jae; Sung, Yung Eun; Lee, Jin Kyu.

In: Nanoscale, Vol. 8, No. 10, 14.03.2016, p. 5688-5695.

Research output: Contribution to journalArticle

Lim, Joohyun ; Um, Ji Hyun ; Lee, Kyung Jae ; Yu, Seung-Ho ; Kim, Young Jae ; Sung, Yung Eun ; Lee, Jin Kyu. / Simple size control of TiO 2 nanoparticles and their electrochemical performance : Emphasizing the contribution of the surface area to lithium storage at high-rates. In: Nanoscale. 2016 ; Vol. 8, No. 10. pp. 5688-5695.
@article{f85dfcbccbe64474a36eb124d7ef43c2,
title = "Simple size control of TiO 2 nanoparticles and their electrochemical performance: Emphasizing the contribution of the surface area to lithium storage at high-rates",
abstract = "The particle size effects of TiO 2 nanoparticles (TNPs), which are composed of small crystallites, on Li ion storage are a very fundamental and important subject. However, size control of TNPs under 200 nm using a sol-gel method has been limited due to the highly reactive precursor, titanium alkoxide. In this study, TNPs with various sizes even under 100 nm are obtained by controlling the reactant concentrations in a mixed solvent of ethanol and acetonitrile. Among them, three different sizes of TNPs are prepared to compare the Li ion storage capacity, and 60 nm TNPs are found to have the best reversible capacity of 182 mA h g -1 after 50 cycles at 1 C and a remarkable rate performance of 120 mA h g -1 at 10 C. Capacity increase upon cycling is observed in the size-controlled TNPs, and the explanation of this phenomenon is proposed to the lattice volume expansion of TiO 2 upon intercalation for enabling further penetration of the electrolyte into the particles' interior. Moreover, the capacity at high rates is more closely related to the surface area from Hg porosimetry analysis than from typical N 2 adsorption/desorption analysis.",
author = "Joohyun Lim and Um, {Ji Hyun} and Lee, {Kyung Jae} and Seung-Ho Yu and Kim, {Young Jae} and Sung, {Yung Eun} and Lee, {Jin Kyu}",
year = "2016",
month = "3",
day = "14",
doi = "10.1039/c6nr00104a",
language = "English",
volume = "8",
pages = "5688--5695",
journal = "Nanoscale",
issn = "2040-3364",
publisher = "Royal Society of Chemistry",
number = "10",

}

TY - JOUR

T1 - Simple size control of TiO 2 nanoparticles and their electrochemical performance

T2 - Emphasizing the contribution of the surface area to lithium storage at high-rates

AU - Lim, Joohyun

AU - Um, Ji Hyun

AU - Lee, Kyung Jae

AU - Yu, Seung-Ho

AU - Kim, Young Jae

AU - Sung, Yung Eun

AU - Lee, Jin Kyu

PY - 2016/3/14

Y1 - 2016/3/14

N2 - The particle size effects of TiO 2 nanoparticles (TNPs), which are composed of small crystallites, on Li ion storage are a very fundamental and important subject. However, size control of TNPs under 200 nm using a sol-gel method has been limited due to the highly reactive precursor, titanium alkoxide. In this study, TNPs with various sizes even under 100 nm are obtained by controlling the reactant concentrations in a mixed solvent of ethanol and acetonitrile. Among them, three different sizes of TNPs are prepared to compare the Li ion storage capacity, and 60 nm TNPs are found to have the best reversible capacity of 182 mA h g -1 after 50 cycles at 1 C and a remarkable rate performance of 120 mA h g -1 at 10 C. Capacity increase upon cycling is observed in the size-controlled TNPs, and the explanation of this phenomenon is proposed to the lattice volume expansion of TiO 2 upon intercalation for enabling further penetration of the electrolyte into the particles' interior. Moreover, the capacity at high rates is more closely related to the surface area from Hg porosimetry analysis than from typical N 2 adsorption/desorption analysis.

AB - The particle size effects of TiO 2 nanoparticles (TNPs), which are composed of small crystallites, on Li ion storage are a very fundamental and important subject. However, size control of TNPs under 200 nm using a sol-gel method has been limited due to the highly reactive precursor, titanium alkoxide. In this study, TNPs with various sizes even under 100 nm are obtained by controlling the reactant concentrations in a mixed solvent of ethanol and acetonitrile. Among them, three different sizes of TNPs are prepared to compare the Li ion storage capacity, and 60 nm TNPs are found to have the best reversible capacity of 182 mA h g -1 after 50 cycles at 1 C and a remarkable rate performance of 120 mA h g -1 at 10 C. Capacity increase upon cycling is observed in the size-controlled TNPs, and the explanation of this phenomenon is proposed to the lattice volume expansion of TiO 2 upon intercalation for enabling further penetration of the electrolyte into the particles' interior. Moreover, the capacity at high rates is more closely related to the surface area from Hg porosimetry analysis than from typical N 2 adsorption/desorption analysis.

UR - http://www.scopus.com/inward/record.url?scp=84960395876&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84960395876&partnerID=8YFLogxK

U2 - 10.1039/c6nr00104a

DO - 10.1039/c6nr00104a

M3 - Article

AN - SCOPUS:84960395876

VL - 8

SP - 5688

EP - 5695

JO - Nanoscale

JF - Nanoscale

SN - 2040-3364

IS - 10

ER -