Issue 13, 2024

Optimized lithium deposition on Ag nanoparticles-embedded TiO2 microspheres: a facile spray pyrolysis approach for enhanced lithium metal anode

Abstract

The lithium anode is considered the “holy grail” anode for replacing conventional graphite-based anodes because of its high theoretical capacity and lowest redox potential; however, safety problems arising from the dendritic growth of lithium and large volume fluctuation require resolution to make its commercialization viable. The introduction of a 3D matrix with lithiophilic materials can effectively overcome the challenges that lithium metal batteries associate with commercialization. In this study, we fabricated composite microspheres using TiO2 as an electrochemically stable 3D scaffold and well-dispersed Ag nanoparticles as lithiophilic sites (defined as 600-TiO2-5Ag) via facile spray pyrolysis. Uniquely structured 3D host materials for lithium metal anodes (LMAs) consistently demonstrated stable lithium deposition and stripping performance over 500 cycles while being tested under a current density of 1.0 mA cm−2 in an asymmetrical cell. In addition, we studied their lithium storage mechanisms through FIB-TEM analysis. Furthermore, with the deposition of 5.0 mA h cm−2 of lithium, the symmetric cell exhibited a low overpotential of 24 mV for over 1000 h, and a full cell assembled with commercial LiNi0.8Co0.1Mn0.1O2 (NCM 811) also displayed highly enhanced cell stability and rate capability. This work suggests combining intercalation- and alloying-type materials to synergistically enhance the lithium deposition behavior of LMAs.

Graphical abstract: Optimized lithium deposition on Ag nanoparticles-embedded TiO2 microspheres: a facile spray pyrolysis approach for enhanced lithium metal anode

Supplementary files

Article information

Article type
Paper
Submitted
18 Dec 2023
Accepted
19 Feb 2024
First published
22 Feb 2024

J. Mater. Chem. A, 2024,12, 7670-7679

Optimized lithium deposition on Ag nanoparticles-embedded TiO2 microspheres: a facile spray pyrolysis approach for enhanced lithium metal anode

J. W. Kang, J. H. Choi, J. Lee and Y. C. Kang, J. Mater. Chem. A, 2024, 12, 7670 DOI: 10.1039/D3TA07829A

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