Melamine-assisted synthesis of porous V2O3/N-doped carbon hollow nanospheres for efficient sodium-ion storage

Vanadium-based oxides with relatively high theoretical capacity have been regarded as promising electrode materials for boosting energy conversion and storage. However, their poor electrical conductivity usually leads to unsatisfied performance and poor cycling stability. Herein, uniform V2O3/N-dope...

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Published inDalton transactions : an international journal of inorganic chemistry Vol. 50; no. 11; pp. 3867 - 3873
Main Authors Yao, Jiaxin, Zhang, Heng, Zhao, Zejun, Zhu, Zhixiao, Yao, Jialing, Zheng, Xiaoyan, Yang, Yong
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 21.03.2021
Subjects
Carbon
Cycles
Electrical resistivity
Electrode materials
Energy conversion
Energy storage
Hydrothermal reactions
Ion storage
Melamine
Morphology
Nanospheres
Performance enhancement
Rechargeable batteries
Structural stability
Synergistic effect
Vanadium oxides
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Summary:Vanadium-based oxides with relatively high theoretical capacity have been regarded as promising electrode materials for boosting energy conversion and storage. However, their poor electrical conductivity usually leads to unsatisfied performance and poor cycling stability. Herein, uniform V2O3/N-doped carbon hollow nanospheres (V2O3/NC HSs) with mesoporous structures were successfully synthesized through a melamine-assisted simple hydrothermal reaction and carbonization treatment. We demonstrated that the introduction of melamine played an essential role in the construction of V2O3/NC HSs. Benefitting from the special mesoporous structure and large specific surface area, the as-obtained sample exhibited enhanced conductivity and structural stability. As a proof of concept, well-defined V2O3/NC HSs exhibited excellent cycling stability and rate performance for sodium-ion batteries, and achieved a discharge capacity of 263.8 mA h g−1 at a current density of 1.0 A g−1 after 1000 cycles, one of the best performances of V-based compounds. The enhanced performance could be attributed to the synergistic effect of the hollow structure and surface carbon coating. The present work describes the design of the morphology and structure of vanadium-based oxides for energy storage devices.
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ISSN:1477-9226
1477-9234
DOI:10.1039/d1dt00047k