| Autor: |
Jia-Bin, Fang, Chang, Liu, Tao-Qing, Zi, Yan-Qiang, Cao, Di, Wu, Ai-Dong, Li |
| Rok vydání: |
2020 |
| Zdroj: |
Dalton transactions (Cambridge, England : 2003). 49(31) |
| ISSN: |
1477-9234 |
| Popis: |
To address the issues of large volume expansion and low electrical conductivity of ZnO anode nanomaterials during lithium ion battery operation, herein we engineered a rod-like ZnO anode with robust and conductive TiO2 quantum dot (QD)@carbon coating derived from molecular layer deposited titanicone, in which the TiO2 QDs are well confined inside the carbon layer. Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) confirm the formation of TiO2 QDs and carbonization of fumaric acid in hybrid films after annealing in H2 atmosphere at 700 °C. Benefiting from a unique protective layer design, the prepared TiO2 QD@carbon@ZnO nanorod (NR) anodes display outstanding cycling performance with a discharge capacity of 1154 mA h g-1 after 100 cycles and 70% capacity retention, along with a high rate capacity of 470 mA h g-1 for 500 cycles at 2 A g-1. Moreover, our work demonstrates an innovative and promising approach toward a robust and conductive metal oxide QD@carbon nanocomposite layer for electrode materials in the future. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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