Nanoporous carbon leading to the high performance of a Na3V2O2(PO4)2F@carbon/graphene cathode in a sodium ion battery
| Autor: | Shuen Hou, Jie Dong, Hongyun Jin, Jiangyu Li, Evan Uchaker, Guozhong Cao, Min Liu, Qifeng Zhang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Battery (electricity)
Materials science Graphene Graphene foam Sodium-ion battery chemistry.chemical_element Nanotechnology 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences Cathode 0104 chemical sciences law.invention chemistry law Electrode General Materials Science 0210 nano-technology Carbon |
| Zdroj: | CrystEngComm. 19:4287-4293 |
| ISSN: | 1466-8033 |
| DOI: | 10.1039/c7ce00726d |
| Popis: | The Na3V2O2(PO4)2F/graphene sandwich cathode has attracted great attention as a potential candidate for sodium-ion batteries in view of its high capacity and good cycling ability. However, a big issue for Na3V2O2(PO4)2F/graphene is its extremely poor electronic conductivity due to the multilayer structure in which Na3V2O2(PO4)2F particles are located between the graphene layers. We introduced carbon in the Na3V2O2(PO4)2F/graphene sandwich to form a 3D architecture – Na3V2O2(PO4)2F@carbon/graphene (NVPF@C/G). A battery with the NVPF@C/G cathode presents good electrochemical properties, a high capacity, 135.8 mAh g−1 at 0.1C, with a capacity retention of 96.8% at 2C for fifty cycles. NVPF@C/G showed obvious advantage in the rate performance and cycle stability compared with the NVPF/G sandwich, which indicated that the nanoporous carbon integrated in the 3D structure plays a crucial role in improving the electrochemical performance. It is anticipated that such a new method of introducing nanoporous carbon for battery performance enhancement can be extended to other graphene-based sandwich structure electrodes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|