A three-dimensional TiO2-Graphene architecture with superior Li ion and Na ion storage performance
Wang, Jun ; Li, Jinke ; He, Xin ; Zhang, Xiaofei ; Yan, Bo ; Hou, Xu LU
; Du, Leilei
; Placke, Tobias
; Winter, Martin
and Li, Jie
(2020)
In Journal of Power Sources
461.
- Abstract
In this work, a three-dimensional TiO2-graphene composite with large specific surface area is designed by freeze drying. In this architecture, primary TiO2 nanoparticles (less than 10 nm in size) are wrapped with graphene homogeneously, forming spherical secondary particles (≈100 nm), and the spherical TiO2 particles further agglomerate into platelet-like particles with several micrometers in size. The TiO2-graphene composite delivers high de-lithiation and de-sodiation capacities of 312 mAh g−1 and 280 mAh g−1 at 17 mA g−1 as negative electrode materials in lithium and sodium cells, respectively, and excellent cycling performance with negligible capacity loss... (More)
In this work, a three-dimensional TiO2-graphene composite with large specific surface area is designed by freeze drying. In this architecture, primary TiO2 nanoparticles (less than 10 nm in size) are wrapped with graphene homogeneously, forming spherical secondary particles (≈100 nm), and the spherical TiO2 particles further agglomerate into platelet-like particles with several micrometers in size. The TiO2-graphene composite delivers high de-lithiation and de-sodiation capacities of 312 mAh g−1 and 280 mAh g−1 at 17 mA g−1 as negative electrode materials in lithium and sodium cells, respectively, and excellent cycling performance with negligible capacity loss after 500 cycles at a specific current of 85 mA g−1. When coupled with an activated carbon positive electrode, it demonstrates high capacitance and long cycle life in sodium ion capacitors (81% after 2000 cycles at 1 A g−1) and lithium ion capacitors (95% after 5000 cycles at 1 A g−1). Its superior performance benefits from the designed 3D architecture, which combines the advantages of small primary particle size, a homogeneous carbon coating and an adequate contact area with the liquid electrolyte. The storage mechanisms of the superior TiO2-graphene composite in lithium and sodium cells are investigated by operando X-ray diffraction studies.
(Less)
- author
- Wang, Jun
; Li, Jinke
; He, Xin
; Zhang, Xiaofei
; Yan, Bo
; Hou, Xu
LU
; Du, Leilei
; Placke, Tobias
; Winter, Martin
and Li, Jie
- publishing date
- 2020-06-15
- type
- Contribution to journal
- publication status
- published
- keywords
- Energy storage devices, Graphene, Negative electrode material, Titanium oxides
- in
- Journal of Power Sources
- volume
- 461
- article number
- 228129
- publisher
- Elsevier
- external identifiers
-
- scopus:85082753897
- ISSN
- 0378-7753
- DOI
- 10.1016/j.jpowsour.2020.228129
- language
- English
- LU publication?
- no
- additional info
- Publisher Copyright: © 2020
- id
- e2c66d4c-dd47-4c87-99c1-213601e5e20b
- date added to LUP
- 2025-12-05 22:39:09
- date last changed
- 2025-12-11 15:01:01
@article{e2c66d4c-dd47-4c87-99c1-213601e5e20b,
abstract = {{<p>In this work, a three-dimensional TiO<sub>2</sub>-graphene composite with large specific surface area is designed by freeze drying. In this architecture, primary TiO<sub>2</sub> nanoparticles (less than 10 nm in size) are wrapped with graphene homogeneously, forming spherical secondary particles (≈100 nm), and the spherical TiO<sub>2</sub> particles further agglomerate into platelet-like particles with several micrometers in size. The TiO<sub>2</sub>-graphene composite delivers high de-lithiation and de-sodiation capacities of 312 mAh g<sup>−1</sup> and 280 mAh g<sup>−1</sup> at 17 mA g<sup>−1</sup> as negative electrode materials in lithium and sodium cells, respectively, and excellent cycling performance with negligible capacity loss after 500 cycles at a specific current of 85 mA g<sup>−1</sup>. When coupled with an activated carbon positive electrode, it demonstrates high capacitance and long cycle life in sodium ion capacitors (81% after 2000 cycles at 1 A g<sup>−1</sup>) and lithium ion capacitors (95% after 5000 cycles at 1 A g<sup>−1</sup>). Its superior performance benefits from the designed 3D architecture, which combines the advantages of small primary particle size, a homogeneous carbon coating and an adequate contact area with the liquid electrolyte. The storage mechanisms of the superior TiO<sub>2</sub>-graphene composite in lithium and sodium cells are investigated by operando X-ray diffraction studies.</p>}},
author = {{Wang, Jun and Li, Jinke and He, Xin and Zhang, Xiaofei and Yan, Bo and Hou, Xu and Du, Leilei and Placke, Tobias and Winter, Martin and Li, Jie}},
issn = {{0378-7753}},
keywords = {{Energy storage devices; Graphene; Negative electrode material; Titanium oxides}},
language = {{eng}},
month = {{06}},
publisher = {{Elsevier}},
series = {{Journal of Power Sources}},
title = {{A three-dimensional TiO<sub>2</sub>-Graphene architecture with superior Li ion and Na ion storage performance}},
url = {{http://dx.doi.org/10.1016/j.jpowsour.2020.228129}},
doi = {{10.1016/j.jpowsour.2020.228129}},
volume = {{461}},
year = {{2020}},
}