Intercalation pseudocapacitance of amorphous titanium dioxide@nanoporous graphene for high-rate and large-capacity energy storage

Jiuhui Han, Akihiko Hirata, Jing Du, Yoshikazu Ito, Takeshi Fujita, Shinji Kohara, Toshiaki Ina, Mingwei Chen

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

In comparison to conventional supercapacitors that commonly fall short of energy densities, the intercalation pseudocapacitors have combined high charge-storage capacity and fast charge/discharge rates from their unique charge storage mechanism of fast kinetics without the limitation of diffusion. Nevertheless, only very limited crystalline materials have a structure that can fulfill the strict demands of fast ion transport pathways and insignificant structural variation upon ion insertion and extraction for the intercalation pseudocapacitance. Here we report that amorphous titanium dioxide, grown on highly conductive nanoporous graphene frameworks by atomic layer deposition, is capable of storing and delivering a large capacity at high rates by pseudocapacitive and bulk-form Li+ intercalation/de-intercalation reactions. Different from intercalation pseudocapacitive crystals, amorphous TiO2 experiences local structure changes during Li+ insertion and extraction which essentially only lead to insignificant constraints on the overall kinetics as a result of loose packing and structure disorder of amorphous materials. This study paves a new way to develop high-energy capacitive materials in a wide spectrum of amorphous materials and may promote the practical implementation of high-rate and large-capacity energy storage.

Original languageEnglish
Pages (from-to)354-362
Number of pages9
JournalNano Energy
Volume49
DOIs
Publication statusPublished - 2018 Jul 1
Externally publishedYes

Fingerprint

Graphite
Intercalation
Titanium dioxide
Energy storage
Graphene
Ions
Kinetics
Atomic layer deposition
titanium dioxide
Crystalline materials
Crystals

Keywords

  • Amorphous titanium dioxide
  • High-rate energy storage
  • Intercalation pseudocapacitance
  • Nanoporous graphene
  • Supercapacitors

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

Cite this

Intercalation pseudocapacitance of amorphous titanium dioxide@nanoporous graphene for high-rate and large-capacity energy storage. / Han, Jiuhui; Hirata, Akihiko; Du, Jing; Ito, Yoshikazu; Fujita, Takeshi; Kohara, Shinji; Ina, Toshiaki; Chen, Mingwei.

In: Nano Energy, Vol. 49, 01.07.2018, p. 354-362.

Research output: Contribution to journalArticle

Han, Jiuhui ; Hirata, Akihiko ; Du, Jing ; Ito, Yoshikazu ; Fujita, Takeshi ; Kohara, Shinji ; Ina, Toshiaki ; Chen, Mingwei. / Intercalation pseudocapacitance of amorphous titanium dioxide@nanoporous graphene for high-rate and large-capacity energy storage. In: Nano Energy. 2018 ; Vol. 49. pp. 354-362.
@article{cdf1b08d7b264a5fb7bd768bd6727ed4,
title = "Intercalation pseudocapacitance of amorphous titanium dioxide@nanoporous graphene for high-rate and large-capacity energy storage",
abstract = "In comparison to conventional supercapacitors that commonly fall short of energy densities, the intercalation pseudocapacitors have combined high charge-storage capacity and fast charge/discharge rates from their unique charge storage mechanism of fast kinetics without the limitation of diffusion. Nevertheless, only very limited crystalline materials have a structure that can fulfill the strict demands of fast ion transport pathways and insignificant structural variation upon ion insertion and extraction for the intercalation pseudocapacitance. Here we report that amorphous titanium dioxide, grown on highly conductive nanoporous graphene frameworks by atomic layer deposition, is capable of storing and delivering a large capacity at high rates by pseudocapacitive and bulk-form Li+ intercalation/de-intercalation reactions. Different from intercalation pseudocapacitive crystals, amorphous TiO2 experiences local structure changes during Li+ insertion and extraction which essentially only lead to insignificant constraints on the overall kinetics as a result of loose packing and structure disorder of amorphous materials. This study paves a new way to develop high-energy capacitive materials in a wide spectrum of amorphous materials and may promote the practical implementation of high-rate and large-capacity energy storage.",
keywords = "Amorphous titanium dioxide, High-rate energy storage, Intercalation pseudocapacitance, Nanoporous graphene, Supercapacitors",
author = "Jiuhui Han and Akihiko Hirata and Jing Du and Yoshikazu Ito and Takeshi Fujita and Shinji Kohara and Toshiaki Ina and Mingwei Chen",
year = "2018",
month = "7",
day = "1",
doi = "10.1016/j.nanoen.2018.04.063",
language = "English",
volume = "49",
pages = "354--362",
journal = "Nano Energy",
issn = "2211-2855",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Intercalation pseudocapacitance of amorphous titanium dioxide@nanoporous graphene for high-rate and large-capacity energy storage

AU - Han, Jiuhui

AU - Hirata, Akihiko

AU - Du, Jing

AU - Ito, Yoshikazu

AU - Fujita, Takeshi

AU - Kohara, Shinji

AU - Ina, Toshiaki

AU - Chen, Mingwei

PY - 2018/7/1

Y1 - 2018/7/1

N2 - In comparison to conventional supercapacitors that commonly fall short of energy densities, the intercalation pseudocapacitors have combined high charge-storage capacity and fast charge/discharge rates from their unique charge storage mechanism of fast kinetics without the limitation of diffusion. Nevertheless, only very limited crystalline materials have a structure that can fulfill the strict demands of fast ion transport pathways and insignificant structural variation upon ion insertion and extraction for the intercalation pseudocapacitance. Here we report that amorphous titanium dioxide, grown on highly conductive nanoporous graphene frameworks by atomic layer deposition, is capable of storing and delivering a large capacity at high rates by pseudocapacitive and bulk-form Li+ intercalation/de-intercalation reactions. Different from intercalation pseudocapacitive crystals, amorphous TiO2 experiences local structure changes during Li+ insertion and extraction which essentially only lead to insignificant constraints on the overall kinetics as a result of loose packing and structure disorder of amorphous materials. This study paves a new way to develop high-energy capacitive materials in a wide spectrum of amorphous materials and may promote the practical implementation of high-rate and large-capacity energy storage.

AB - In comparison to conventional supercapacitors that commonly fall short of energy densities, the intercalation pseudocapacitors have combined high charge-storage capacity and fast charge/discharge rates from their unique charge storage mechanism of fast kinetics without the limitation of diffusion. Nevertheless, only very limited crystalline materials have a structure that can fulfill the strict demands of fast ion transport pathways and insignificant structural variation upon ion insertion and extraction for the intercalation pseudocapacitance. Here we report that amorphous titanium dioxide, grown on highly conductive nanoporous graphene frameworks by atomic layer deposition, is capable of storing and delivering a large capacity at high rates by pseudocapacitive and bulk-form Li+ intercalation/de-intercalation reactions. Different from intercalation pseudocapacitive crystals, amorphous TiO2 experiences local structure changes during Li+ insertion and extraction which essentially only lead to insignificant constraints on the overall kinetics as a result of loose packing and structure disorder of amorphous materials. This study paves a new way to develop high-energy capacitive materials in a wide spectrum of amorphous materials and may promote the practical implementation of high-rate and large-capacity energy storage.

KW - Amorphous titanium dioxide

KW - High-rate energy storage

KW - Intercalation pseudocapacitance

KW - Nanoporous graphene

KW - Supercapacitors

UR - http://www.scopus.com/inward/record.url?scp=85046703474&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85046703474&partnerID=8YFLogxK

U2 - 10.1016/j.nanoen.2018.04.063

DO - 10.1016/j.nanoen.2018.04.063

M3 - Article

AN - SCOPUS:85046703474

VL - 49

SP - 354

EP - 362

JO - Nano Energy

JF - Nano Energy

SN - 2211-2855

ER -