V2(PO4)O encapsulated into crumpled nitrogen-doped graphene as a high-performance anode material for sodium-ion batteries
| Autor: | Bo Wang, Chang-sheng An, Junchao Zheng, Wen-hai Zhang, Peng-bo Wang, Lin-bo Tang, Zhenjiang He, Xiao Bin, Tong Hui |
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| Rok vydání: | 2019 |
| Předmět: |
Nitrogen doped graphene
Materials science Graphene General Chemical Engineering Sodium chemistry.chemical_element 02 engineering and technology Crystal structure 010402 general chemistry 021001 nanoscience & nanotechnology Phosphate 01 natural sciences 0104 chemical sciences law.invention Anode chemistry.chemical_compound chemistry Chemical engineering law Electrochemistry Voltage range 0210 nano-technology Current density |
| Zdroj: | Electrochimica Acta. 306:238-244 |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2019.03.133 |
| Popis: | Phosphate-based polyanion-structured materials have attracted considerable attention as anode materials in lithium-/sodium-ion batteries due to their stable crystal structure, affordability, and environmental friendliness. V2(PO4)O was encapsulated into crumpled nitrogen-doped graphene (VPO@N-G) through a facile spray-drying method in which VPO particles were completely encapsulated by N-doped graphene. For the first time, VPO@N-G was explored as an anode material for sodium-ion batteries. The Na+ storage behavior of VPO@N-G was systematically investigated at the voltage range of 0.01–3.0 V (versus Na/Na+). Results indicated that the VPO@N-G anode can deliver a highly reversible discharge capacity of 539 mAh g−1 at 0.05 A g−1 and achieve a highly reversible discharge capacity of 235.9 mAh g−1 even at a high current density of 10 A g−1. Thus, VPO@N-G can be applied as a high-rate anode material for sodium-ion batteries. |
| Databáze: | OpenAIRE |
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