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TiO2@LiTi2(PO4)3 enabling fast and stable lithium storage for high voltage aqueous lithium-ion batteries

Hou, Xu LU orcid ; Ju, Xiaokang ; Zhao, Wenguang ; Wang, Jun ; He, Xin ; Du, Leilei ; Yan, Bo ; Li, Jinke ; Paillard, Elie and Sun, Jingyu , et al. (2021) In Journal of Power Sources 484.
Abstract

Anatase TiO2 is recognized as a promising negative electrode material when employing “water-in-salt” electrolytes in high voltage aqueous lithium-ion batteries. However, the catalytic property of water splitting aggravates the hydrogen evolution reaction, which hinders the formation of a stable solid electrolyte interphase (SEI) on the electrode surface and therefore results in poor cycling performance. To address this issue, nanostructured anatase TiO2 with amorphous LiTi2(PO4)3 as an artificial SEI coating layer is introduced. Amorphous LiTi2(PO4)3 layer enhances the ionic conductivity of TiO2, suppresses side reactions between electrode... (More)

Anatase TiO2 is recognized as a promising negative electrode material when employing “water-in-salt” electrolytes in high voltage aqueous lithium-ion batteries. However, the catalytic property of water splitting aggravates the hydrogen evolution reaction, which hinders the formation of a stable solid electrolyte interphase (SEI) on the electrode surface and therefore results in poor cycling performance. To address this issue, nanostructured anatase TiO2 with amorphous LiTi2(PO4)3 as an artificial SEI coating layer is introduced. Amorphous LiTi2(PO4)3 layer enhances the ionic conductivity of TiO2, suppresses side reactions between electrode and electrolyte, and enables the formation of an effective SEI layer during the cycling. Thus, the TiO2@LiTi2(PO4)3 composite shows low polarization and high interface stability in an aqueous lithium-ion battery. As a result, a full cell LiMn2O4 |21 mol kg–1 LiTFSI in water |TiO2@LiTi2(PO4)3 demonstrates a high rate capability (60 mAh g−1 at 20 C) and a good cycling stability (capacity decay of 0.24% per cycle within 100 cycles). Systemic studies prove that TiO2@LiTi2(PO4)3 nanocomposite is an ideal negative electrode material candidate with low redox potential and high capacity for high voltage aqueous lithium-ion batteries.

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publishing date
type
Contribution to journal
publication status
published
keywords
Amorphous LiTi(PO) coating, High voltage aqueous lithium-ion batteries, TiO negative electrode material, “Water-in-salt” electrolyte
in
Journal of Power Sources
volume
484
article number
229255
publisher
Elsevier
external identifiers
  • scopus:85097470601
ISSN
0378-7753
DOI
10.1016/j.jpowsour.2020.229255
language
English
LU publication?
no
additional info
Publisher Copyright: © 2020 Elsevier B.V.
id
61342054-6c93-4f0a-a3aa-9ad94d36fb7f
date added to LUP
2025-12-05 22:36:45
date last changed
2025-12-11 14:58:28
@article{61342054-6c93-4f0a-a3aa-9ad94d36fb7f,
  abstract     = {{<p>Anatase TiO<sub>2</sub> is recognized as a promising negative electrode material when employing “water-in-salt” electrolytes in high voltage aqueous lithium-ion batteries. However, the catalytic property of water splitting aggravates the hydrogen evolution reaction, which hinders the formation of a stable solid electrolyte interphase (SEI) on the electrode surface and therefore results in poor cycling performance. To address this issue, nanostructured anatase TiO<sub>2</sub> with amorphous LiTi<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> as an artificial SEI coating layer is introduced. Amorphous LiTi<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> layer enhances the ionic conductivity of TiO<sub>2</sub>, suppresses side reactions between electrode and electrolyte, and enables the formation of an effective SEI layer during the cycling. Thus, the TiO<sub>2</sub>@LiTi<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> composite shows low polarization and high interface stability in an aqueous lithium-ion battery. As a result, a full cell LiMn<sub>2</sub>O<sub>4</sub> |21 mol kg<sup>–</sup><sup>1</sup> LiTFSI in water |TiO<sub>2</sub>@LiTi<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> demonstrates a high rate capability (60 mAh g<sup>−1</sup> at 20 C) and a good cycling stability (capacity decay of 0.24% per cycle within 100 cycles). Systemic studies prove that TiO<sub>2</sub>@LiTi<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> nanocomposite is an ideal negative electrode material candidate with low redox potential and high capacity for high voltage aqueous lithium-ion batteries.</p>}},
  author       = {{Hou, Xu and Ju, Xiaokang and Zhao, Wenguang and Wang, Jun and He, Xin and Du, Leilei and Yan, Bo and Li, Jinke and Paillard, Elie and Sun, Jingyu and Lin, Hai and Winter, Martin and Li, Jie}},
  issn         = {{0378-7753}},
  keywords     = {{Amorphous LiTi(PO) coating; High voltage aqueous lithium-ion batteries; TiO negative electrode material; “Water-in-salt” electrolyte}},
  language     = {{eng}},
  month        = {{02}},
  publisher    = {{Elsevier}},
  series       = {{Journal of Power Sources}},
  title        = {{TiO<sub>2</sub>@LiTi<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> enabling fast and stable lithium storage for high voltage aqueous lithium-ion batteries}},
  url          = {{http://dx.doi.org/10.1016/j.jpowsour.2020.229255}},
  doi          = {{10.1016/j.jpowsour.2020.229255}},
  volume       = {{484}},
  year         = {{2021}},
}