首页|Surface-dominated sodium storage enabled by TiO2 nanosheets with 84 % exposure of (0 0 1) facets for high-performance Na-ion battery anodes

Surface-dominated sodium storage enabled by TiO2 nanosheets with 84 % exposure of (0 0 1) facets for high-performance Na-ion battery anodes

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  • Elsevier
© 2024 Elsevier B.V.Anatase titanium dioxide (TiO2) has garnered enormous attention as a promising anode material for sodium-ion batteries (SIBs), owing to its non-toxicity, superior structural stability, and cost-effectiveness. Nevertheless, its intrinsic low electrical conductivity poses a substantial challenge to its practical applications. Here, the ultrathin TiO2 nanosheets were obtained. The TiO2 nanosheets with a thickness of ∼8 nm and exposed 84 % (0 0 1) facet. The exposed (0 0 1) crystal facets and ultrathin nanosheet structure provide abundant active sites for Na-ion adsorption, shortens ion diffusion pathways, enhances reaction kinetics, and significantly boosts the pseudocapacitive effect. This synergistic strategy of exposed (0 0 1) facet with nanosheets structure leads to an exceptional capacity of 177.1 mAh/g at 0.1 A/g, and 59 % capacity retention at 5 A/g. This work will contribute to the understanding of facet-dependent electrochemical behavior anode materials for high-performance SIBs.

Exposed facetsPseudocapacitive-dominatedSodium-ion batteries anodeTiO2 nanosheets

Li Y.、Gao Y.、Li X.、Zhang J.、Zhang X.、Zhang D.

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College of Chemistry and Pharmaceutical Engineering Nanyang Normal University

2025

10.1016/j.matlet.2024.137737

Materials letters

Materials letters

SCI
ISSN：0167-577X
年,卷(期)：2025.380(Feb.1)
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