Effect of graphene nanosheets on electrochemical performance of Li4Ti5O12 in lithium-ion capacitors

Chengxing Lu, Xin Wang, Xin Zhang, Huifen Peng, Yongguang Zhang, Gongkai Wang, Zhenkun Wang, Guanlong Cao, Nurzhan Umirov, Zhumabay Bakenov

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

In order to improve the electrochemical performance of lithium titanium oxide, Li4Ti5O12 (LTO), for the use in the lithium-ion capacitors (LICs) application, LTO/graphene composites were synthesized through a solid state reaction. The composite exhibited an interwoven structure with LTO particles dispersed into graphene nanosheets network rather than an agglomerated state pristine LTO particles. It was found that there is an optimum percentage of graphene additives for the formation of pure LTO phase during the solid state synthesis of LTO/graphene composite. The effect of graphene nanosheets addition on electrochemical performance of LTO was investigated by a systemic characterization of galvanostatic cycling in lithium and lithium-ion cell configuration. The optimized composite exhibited a decreased polarization upon cycling and delivered a specific capacity of 173 mA h g−1 at 0.1 C and a well maintained capacity of 65 mA h g−1 even at 20 C. The energy density of 14 Wh kg−1 at a power density of 2700 W kg−1 was exhibited by a LIC full cell with a balanced mass ratio of anode to cathode along with a superior capacitance retention of 97% after 3000 cycles at a current density of 0.4 A g−1. This boost in reversible capacity, rate capability and cycling performance was attributed to a synergistic effect of graphene nanosheets, which provided a short lithium ion diffusion path as well as facile electron conduction channels.

Original languageEnglish
Pages (from-to)6554-6562
Number of pages9
JournalCeramics International
Volume43
Issue number8
DOIs
Publication statusPublished - Jun 1 2017

Fingerprint

Graphite
Nanosheets
Lithium
Graphene
Capacitors
Ions
Composite materials
Titanium oxides
Solid state reactions
Anodes
Cathodes
Current density
Capacitance
Polarization
Electrons

Keywords

  • Effect
  • Electrochemical performance
  • Graphene nanosheets
  • LiTiO
  • Lithium ion capacitor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Effect of graphene nanosheets on electrochemical performance of Li4Ti5O12 in lithium-ion capacitors. / Lu, Chengxing; Wang, Xin; Zhang, Xin; Peng, Huifen; Zhang, Yongguang; Wang, Gongkai; Wang, Zhenkun; Cao, Guanlong; Umirov, Nurzhan; Bakenov, Zhumabay.

In: Ceramics International, Vol. 43, No. 8, 01.06.2017, p. 6554-6562.

Research output: Contribution to journalArticle

Lu, Chengxing ; Wang, Xin ; Zhang, Xin ; Peng, Huifen ; Zhang, Yongguang ; Wang, Gongkai ; Wang, Zhenkun ; Cao, Guanlong ; Umirov, Nurzhan ; Bakenov, Zhumabay. / Effect of graphene nanosheets on electrochemical performance of Li4Ti5O12 in lithium-ion capacitors. In: Ceramics International. 2017 ; Vol. 43, No. 8. pp. 6554-6562.
@article{3844c92b351445328c15a9f1d516591a,
title = "Effect of graphene nanosheets on electrochemical performance of Li4Ti5O12 in lithium-ion capacitors",
abstract = "In order to improve the electrochemical performance of lithium titanium oxide, Li4Ti5O12 (LTO), for the use in the lithium-ion capacitors (LICs) application, LTO/graphene composites were synthesized through a solid state reaction. The composite exhibited an interwoven structure with LTO particles dispersed into graphene nanosheets network rather than an agglomerated state pristine LTO particles. It was found that there is an optimum percentage of graphene additives for the formation of pure LTO phase during the solid state synthesis of LTO/graphene composite. The effect of graphene nanosheets addition on electrochemical performance of LTO was investigated by a systemic characterization of galvanostatic cycling in lithium and lithium-ion cell configuration. The optimized composite exhibited a decreased polarization upon cycling and delivered a specific capacity of 173 mA h g−1 at 0.1 C and a well maintained capacity of 65 mA h g−1 even at 20 C. The energy density of 14 Wh kg−1 at a power density of 2700 W kg−1 was exhibited by a LIC full cell with a balanced mass ratio of anode to cathode along with a superior capacitance retention of 97{\%} after 3000 cycles at a current density of 0.4 A g−1. This boost in reversible capacity, rate capability and cycling performance was attributed to a synergistic effect of graphene nanosheets, which provided a short lithium ion diffusion path as well as facile electron conduction channels.",
keywords = "Effect, Electrochemical performance, Graphene nanosheets, LiTiO, Lithium ion capacitor",
author = "Chengxing Lu and Xin Wang and Xin Zhang and Huifen Peng and Yongguang Zhang and Gongkai Wang and Zhenkun Wang and Guanlong Cao and Nurzhan Umirov and Zhumabay Bakenov",
year = "2017",
month = "6",
day = "1",
doi = "10.1016/j.ceramint.2017.02.083",
language = "English",
volume = "43",
pages = "6554--6562",
journal = "Ceramics International",
issn = "0272-8842",
publisher = "Elsevier",
number = "8",

}

TY - JOUR

T1 - Effect of graphene nanosheets on electrochemical performance of Li4Ti5O12 in lithium-ion capacitors

AU - Lu, Chengxing

AU - Wang, Xin

AU - Zhang, Xin

AU - Peng, Huifen

AU - Zhang, Yongguang

AU - Wang, Gongkai

AU - Wang, Zhenkun

AU - Cao, Guanlong

AU - Umirov, Nurzhan

AU - Bakenov, Zhumabay

PY - 2017/6/1

Y1 - 2017/6/1

N2 - In order to improve the electrochemical performance of lithium titanium oxide, Li4Ti5O12 (LTO), for the use in the lithium-ion capacitors (LICs) application, LTO/graphene composites were synthesized through a solid state reaction. The composite exhibited an interwoven structure with LTO particles dispersed into graphene nanosheets network rather than an agglomerated state pristine LTO particles. It was found that there is an optimum percentage of graphene additives for the formation of pure LTO phase during the solid state synthesis of LTO/graphene composite. The effect of graphene nanosheets addition on electrochemical performance of LTO was investigated by a systemic characterization of galvanostatic cycling in lithium and lithium-ion cell configuration. The optimized composite exhibited a decreased polarization upon cycling and delivered a specific capacity of 173 mA h g−1 at 0.1 C and a well maintained capacity of 65 mA h g−1 even at 20 C. The energy density of 14 Wh kg−1 at a power density of 2700 W kg−1 was exhibited by a LIC full cell with a balanced mass ratio of anode to cathode along with a superior capacitance retention of 97% after 3000 cycles at a current density of 0.4 A g−1. This boost in reversible capacity, rate capability and cycling performance was attributed to a synergistic effect of graphene nanosheets, which provided a short lithium ion diffusion path as well as facile electron conduction channels.

AB - In order to improve the electrochemical performance of lithium titanium oxide, Li4Ti5O12 (LTO), for the use in the lithium-ion capacitors (LICs) application, LTO/graphene composites were synthesized through a solid state reaction. The composite exhibited an interwoven structure with LTO particles dispersed into graphene nanosheets network rather than an agglomerated state pristine LTO particles. It was found that there is an optimum percentage of graphene additives for the formation of pure LTO phase during the solid state synthesis of LTO/graphene composite. The effect of graphene nanosheets addition on electrochemical performance of LTO was investigated by a systemic characterization of galvanostatic cycling in lithium and lithium-ion cell configuration. The optimized composite exhibited a decreased polarization upon cycling and delivered a specific capacity of 173 mA h g−1 at 0.1 C and a well maintained capacity of 65 mA h g−1 even at 20 C. The energy density of 14 Wh kg−1 at a power density of 2700 W kg−1 was exhibited by a LIC full cell with a balanced mass ratio of anode to cathode along with a superior capacitance retention of 97% after 3000 cycles at a current density of 0.4 A g−1. This boost in reversible capacity, rate capability and cycling performance was attributed to a synergistic effect of graphene nanosheets, which provided a short lithium ion diffusion path as well as facile electron conduction channels.

KW - Effect

KW - Electrochemical performance

KW - Graphene nanosheets

KW - LiTiO

KW - Lithium ion capacitor

UR - http://www.scopus.com/inward/record.url?scp=85013030393&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85013030393&partnerID=8YFLogxK

U2 - 10.1016/j.ceramint.2017.02.083

DO - 10.1016/j.ceramint.2017.02.083

M3 - Article

VL - 43

SP - 6554

EP - 6562

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

IS - 8

ER -