3 years ago

Efficient Lithium-Ion Storage by Hierarchical Core–Shell TiO2 Nanowires Decorated with MoO2 Quantum Dots Encapsulated in Carbon Nanosheets

Efficient Lithium-Ion Storage by Hierarchical Core–Shell TiO2 Nanowires Decorated with MoO2 Quantum Dots Encapsulated in Carbon Nanosheets
Zhongtai Zhang, Shitong Wang, Zilong Tang, Yong Yang
Rational design and surface engineering are the key to synthesizing high-performance electrode materials for electrocatalysis and energy conversion and storage applications. Herein, a novel three-dimensional (3D) nanoarchitecture of TiO2 nanowires decorated with MoO2 quantum dots encapsulated in carbon nanosheets was successfully synthesized by a simple polymerization method. Such a hierarchical nanostructure can not only exhibit the synergistic effect of structural stability of a 1D TiO2 substrate and high capacity of 0D MoO2 quantum dots but also prevent the aggregation and oxidation of MoO2. As a result, the novel 0D-1D-2D composite illustrates an initial discharge capacity of 470 mAh g–1 at a high current density of 500 mA g–1, especially a capacity retention of about 83% after 450 cycles. The present work highlights the designing strategy of nanoarchitectures containing high capacity materials for enhancing electrochemical performance of Ti-based materials.

Publisher URL: http://dx.doi.org/10.1021/acsami.7b05194

DOI: 10.1021/acsami.7b05194

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