Surface-assembled highly flexible Na3(VOPO4)2F nanocube cathode for high-rate binder-free Na-ion batteries
| Autor: | Jinping Liu, Haoyang Dong, Qiuyue Gui, Ning Yue, Bohua Deng, Liang Xiao |
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| Rok vydání: | 2021 |
| Předmět: |
Battery (electricity)
Materials science 02 engineering and technology General Chemistry Bending 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Cathode 0104 chemical sciences Anode law.invention Power (physics) Chemical engineering law Gravimetric analysis 0210 nano-technology Voltage |
| Zdroj: | Chinese Chemical Letters. 32:826-829 |
| ISSN: | 1001-8417 |
| Popis: | Flexible Na-ion storage cathodes are still very few due to the challenge in achieving both reliable mechanical flexibility and excellent electrochemical performances. Herein, a new type of flexible Na3(VOPO4)2F cathode with nanocubes tightly assembled on carbon cloth is fabricated by a facile solvothermal method for the first time. The cathode is able to exhibit superior rate capability and stable cycling performance up to 1000 cycles, due to the surface-assembling of crystalline nanocubes on carbon fibers. In addition, it shows good mechanical flexibility, nearly no capacity decay is observed after continuous bending of 500 times. With this novel cathode and a directly-grown Na2Ti2O5 anode, a fully binder-free Na-ion battery is assembled. It can deliver a high working voltage and increased gravimetric energy/power densities (maximum values: 220.2 Wh/kg; 5674.7 W/kg), and can power a LED indicator at bending angles from 0° to 180°. |
| Databáze: | OpenAIRE |
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