Facile controlled synthesis of hierarchically structured mesoporous Li₄Ti₅O₁₂/C/rGO composites as high-performance anode of lithium-ion batteries

Abstract

In this paper, a facile strategy is proposed to controllably synthesize mesoporous Li₄Ti₅O₁₂/C nanocomposite embedded in graphene matrix as lithium-ion battery anode via the co-assembly of Li₄Ti₅O₁₂ (LTO) precursor, GO, and phenolic resin. The obtained composites, which consists of a LTO core, a phenolic-resin-based carbon shell, and a porous frame constructed by rGO, can be denoted as LTO/C/rGO and presents a hierarchical structure. Owing to the advantages of the hierarchical structure, including a high surface area and a high electric conductivity, the mesoporous LTO/C/rGO composite exhibits a greatly improved rate capability as the anode material in contrast to the conventional LTO electrode.

Graphical abstract

Keywords

Li₄Ti₅O₁₂ / phenolic-resin-based carbon / mesoporous composite / graphene

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Acknowledgments

This work was supported by the National Key Research and Development Program of China (Grant No. 2016YFB0101312) and the National Natural Science Foundation of China (Grant No. 21975157).

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