Universität zu Köln

Wang, Jinshan, Lian, Ruqian, Zhao, Si, Zheng, Lituo, Huang, Yiyin, Wei, Mingdeng ORCID: 0000-0003-4516-7966, Mathur, Sanjay and Hong, Zhensheng (2022). Ultrastable sodium metal plating/striping by engineering heterogeneous nucleation on TiO2 nanotube arrays. Chem. Eng. J., 431. LAUSANNE: ELSEVIER SCIENCE SA. ISSN 1873-3212

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Abstract

Sodium metal is considered as an excellent anode material for sodium-based energy storage devices with both high energy density and low cost, but the uncontrollable growth of sodium metal seriously limits its application. Herein, we firstly propose 3D spaced TiO2 nanotube arrays (STNTs) uniformly coated with ultra-fine metal (Ag, Cu) nanocrystals as a substrate with absorption-diffusion regulation strategy to control the sodium metal deposition behavior. TiO2 has a higher sodiophilic activity with larger Na absorption energy than the traditional copper substrate. Moreover, it is found by ab initio molecular dynamics (AIMD) simulations that it is much easier for Na to spread upon the surface of silver compared to copper, and thus forming a mixed Na-Ag layer at the interface. As a result, sodium metal is inclined to deposit inside or along the nanotube in STNTs-Ag in nanoscale. Finally, STNTs-Ag||Na half-cell displays a high Coulombic efficiency ~99.5% even after 500 cycles with 1 mAh cm(-2). Symmetric cell of STNTs-Ag-Na exhibits an ultralow overpotential of 4 mV and a long-term cycling life over 1400 h. Moreover, STNTs-Ag-Na anode coupling with Na3V2(PO4)(3) cathode exhibits a significantly reduced polarization voltage with 22 mV and improved rate performance with 110 mAhg(-1) at 10 C.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Wang, Jinshan UNSPECIFIED UNSPECIFIED UNSPECIFIED Lian, Ruqian UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhao, Si UNSPECIFIED UNSPECIFIED UNSPECIFIED Zheng, Lituo UNSPECIFIED UNSPECIFIED UNSPECIFIED Huang, Yiyin UNSPECIFIED UNSPECIFIED UNSPECIFIED Wei, Mingdeng UNSPECIFIED orcid.org/0000-0003-4516-7966 UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED Hong, Zhensheng UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-681261
DOI:	10.1016/j.cej.2021.134272
Journal or Publication Title:	Chem. Eng. J.
Volume:	431
Date:	2022
Publisher:	ELSEVIER SCIENCE SA
Place of Publication:	LAUSANNE
ISSN:	1873-3212
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ANODE Multiple languages Engineering, Environmental; Engineering, Chemical Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/68126