Comparative Study of Li4Ti5O12 Composites Prepared withPristine, Oxidized, and Surfactant-Treated Multiwalled Carbon Nanotubes for High-Power Hybrid Supercapacitors

Geon Woo Lee, Myeong Seong Kim, Jun Hui Jeong, Ha Kyung Roh, Kwang Chul Roh, Kwang Bum Kim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In hybrid supercapacitors, lithium-ion battery (LIB)-type intercalation materials have slower reaction kinetics than electrical double-layer-capacitor-type carbonaceous materials. Thus, it is of prime importance to improve the rate capability of LIB-type intercalation materials to achieve high energy density as well as high power density from hybrid supercapacitors. In this study, we report Li4Ti5O12/pristine multiwalled carbon nanotube (LTO/P-MWCNT) composites with high rate capability and demonstrate their anode application for high-power hybrid supercapacitors. For comparison, two additional LTO composites are prepared by using oxidized MWCNTs and surfactant-treated MWCNTs through a similar spray-drying process. The LTO/P-MWCNT composite shows superior rate capability over the other two composites, owing to the high electrical conductivity of pristine MWCNTs. The hybrid supercapacitor composed of a LTO/P-MWCNT anode and an activated carbon cathode delivers an energy density of 70.9 Wh kg−1 at a power density of 0.03 kW kg−1 and a maximum power density of 21.8 kW kg−1 is achieved at an energy density of 24.3 Wh kg−1. Furthermore, the hybrid supercapacitor exhibits excellent cycling stability. These salient results provide further impetus to the use of MWCNTs in the design and synthesis of high-rate oxide-based composites with efficient lithium-ion transport and high electrical conductivity for high-power hybrid supercapacitors and high-power LIBs.

Original languageEnglish
Pages (from-to)2357-2366
Number of pages10
JournalChemElectroChem
Volume5
Issue number17
DOIs
Publication statusPublished - 2018 Sep 3

Fingerprint

Multiwalled carbon nanotubes (MWCN)
Surface-Active Agents
Surface active agents
Composite materials
Intercalation
Anodes
Spray drying
Lithium
Reaction kinetics
Activated carbon
Oxides
Supercapacitor
Cathodes
Capacitors
Ions

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Electrochemistry

Cite this

Lee, Geon Woo ; Kim, Myeong Seong ; Jeong, Jun Hui ; Roh, Ha Kyung ; Roh, Kwang Chul ; Kim, Kwang Bum. / Comparative Study of Li4Ti5O12 Composites Prepared withPristine, Oxidized, and Surfactant-Treated Multiwalled Carbon Nanotubes for High-Power Hybrid Supercapacitors. In: ChemElectroChem. 2018 ; Vol. 5, No. 17. pp. 2357-2366.
@article{7fd848bb5c484195995dd310617507d2,
title = "Comparative Study of Li4Ti5O12 Composites Prepared withPristine, Oxidized, and Surfactant-Treated Multiwalled Carbon Nanotubes for High-Power Hybrid Supercapacitors",
abstract = "In hybrid supercapacitors, lithium-ion battery (LIB)-type intercalation materials have slower reaction kinetics than electrical double-layer-capacitor-type carbonaceous materials. Thus, it is of prime importance to improve the rate capability of LIB-type intercalation materials to achieve high energy density as well as high power density from hybrid supercapacitors. In this study, we report Li4Ti5O12/pristine multiwalled carbon nanotube (LTO/P-MWCNT) composites with high rate capability and demonstrate their anode application for high-power hybrid supercapacitors. For comparison, two additional LTO composites are prepared by using oxidized MWCNTs and surfactant-treated MWCNTs through a similar spray-drying process. The LTO/P-MWCNT composite shows superior rate capability over the other two composites, owing to the high electrical conductivity of pristine MWCNTs. The hybrid supercapacitor composed of a LTO/P-MWCNT anode and an activated carbon cathode delivers an energy density of 70.9 Wh kg−1 at a power density of 0.03 kW kg−1 and a maximum power density of 21.8 kW kg−1 is achieved at an energy density of 24.3 Wh kg−1. Furthermore, the hybrid supercapacitor exhibits excellent cycling stability. These salient results provide further impetus to the use of MWCNTs in the design and synthesis of high-rate oxide-based composites with efficient lithium-ion transport and high electrical conductivity for high-power hybrid supercapacitors and high-power LIBs.",
author = "Lee, {Geon Woo} and Kim, {Myeong Seong} and Jeong, {Jun Hui} and Roh, {Ha Kyung} and Roh, {Kwang Chul} and Kim, {Kwang Bum}",
year = "2018",
month = "9",
day = "3",
doi = "10.1002/celc.201800408",
language = "English",
volume = "5",
pages = "2357--2366",
journal = "ChemElectroChem",
issn = "2196-0216",
publisher = "John Wiley and Sons Ltd",
number = "17",

}

Comparative Study of Li4Ti5O12 Composites Prepared withPristine, Oxidized, and Surfactant-Treated Multiwalled Carbon Nanotubes for High-Power Hybrid Supercapacitors. / Lee, Geon Woo; Kim, Myeong Seong; Jeong, Jun Hui; Roh, Ha Kyung; Roh, Kwang Chul; Kim, Kwang Bum.

In: ChemElectroChem, Vol. 5, No. 17, 03.09.2018, p. 2357-2366.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Comparative Study of Li4Ti5O12 Composites Prepared withPristine, Oxidized, and Surfactant-Treated Multiwalled Carbon Nanotubes for High-Power Hybrid Supercapacitors

AU - Lee, Geon Woo

AU - Kim, Myeong Seong

AU - Jeong, Jun Hui

AU - Roh, Ha Kyung

AU - Roh, Kwang Chul

AU - Kim, Kwang Bum

PY - 2018/9/3

Y1 - 2018/9/3

N2 - In hybrid supercapacitors, lithium-ion battery (LIB)-type intercalation materials have slower reaction kinetics than electrical double-layer-capacitor-type carbonaceous materials. Thus, it is of prime importance to improve the rate capability of LIB-type intercalation materials to achieve high energy density as well as high power density from hybrid supercapacitors. In this study, we report Li4Ti5O12/pristine multiwalled carbon nanotube (LTO/P-MWCNT) composites with high rate capability and demonstrate their anode application for high-power hybrid supercapacitors. For comparison, two additional LTO composites are prepared by using oxidized MWCNTs and surfactant-treated MWCNTs through a similar spray-drying process. The LTO/P-MWCNT composite shows superior rate capability over the other two composites, owing to the high electrical conductivity of pristine MWCNTs. The hybrid supercapacitor composed of a LTO/P-MWCNT anode and an activated carbon cathode delivers an energy density of 70.9 Wh kg−1 at a power density of 0.03 kW kg−1 and a maximum power density of 21.8 kW kg−1 is achieved at an energy density of 24.3 Wh kg−1. Furthermore, the hybrid supercapacitor exhibits excellent cycling stability. These salient results provide further impetus to the use of MWCNTs in the design and synthesis of high-rate oxide-based composites with efficient lithium-ion transport and high electrical conductivity for high-power hybrid supercapacitors and high-power LIBs.

AB - In hybrid supercapacitors, lithium-ion battery (LIB)-type intercalation materials have slower reaction kinetics than electrical double-layer-capacitor-type carbonaceous materials. Thus, it is of prime importance to improve the rate capability of LIB-type intercalation materials to achieve high energy density as well as high power density from hybrid supercapacitors. In this study, we report Li4Ti5O12/pristine multiwalled carbon nanotube (LTO/P-MWCNT) composites with high rate capability and demonstrate their anode application for high-power hybrid supercapacitors. For comparison, two additional LTO composites are prepared by using oxidized MWCNTs and surfactant-treated MWCNTs through a similar spray-drying process. The LTO/P-MWCNT composite shows superior rate capability over the other two composites, owing to the high electrical conductivity of pristine MWCNTs. The hybrid supercapacitor composed of a LTO/P-MWCNT anode and an activated carbon cathode delivers an energy density of 70.9 Wh kg−1 at a power density of 0.03 kW kg−1 and a maximum power density of 21.8 kW kg−1 is achieved at an energy density of 24.3 Wh kg−1. Furthermore, the hybrid supercapacitor exhibits excellent cycling stability. These salient results provide further impetus to the use of MWCNTs in the design and synthesis of high-rate oxide-based composites with efficient lithium-ion transport and high electrical conductivity for high-power hybrid supercapacitors and high-power LIBs.

UR - http://www.scopus.com/inward/record.url?scp=85052726787&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85052726787&partnerID=8YFLogxK

U2 - 10.1002/celc.201800408

DO - 10.1002/celc.201800408

M3 - Article

AN - SCOPUS:85052726787

VL - 5

SP - 2357

EP - 2366

JO - ChemElectroChem

JF - ChemElectroChem

SN - 2196-0216

IS - 17

ER -