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Enhanced electrochemical performance of carbon and aluminum oxide co-coated Na 3 V 2 ( PO 4 ) 2 F 3 cathode material for sodium ion batteries
| Content Provider | Semantic Scholar |
|---|---|
| Author | Zhang, Lu-Lu Liu, Chang Liang, Gan Zhou, Y. Yang, Xuelin |
| Copyright Year | 2018 |
| Abstract | Carbon and aluminum oxide co-coated Na3V2(PO4)2F3 cathode material has been successfully prepared via a wet chemistry method. The effects of the hybrid layer coating of C and Al2O3 on crystalline structure, morphology and electrochemical performance have been investigated. It is found that C and Al2O3 co-coating can stabilize the structure and improve the conductivity of NVPF. As a cathode material for sodium-ion batteries, the co-coated NVPF electrode shows a significant enhancement in rate capability and cycling performance, i.e., compared with bare NVPF, C-coated NVPF and Al2O3-coated NVPF, the NVPF/C-Al electrode delivers the highest capacity of 122.8mAh g 1 with a superior capacity retention ratio of 95.6% after 100 cycles at 1 C. This enhancement in cycling performance and rate capability can be ascribed to the protective effect of this hybrid coating layer of C and Al2O3 on NVPF from electrolyte attack and the facilitated electron/ion transmission caused by the hybrid coating layer. This modification method of co-coating with electronic conductor C and sodium ionic conductivity Al2O3 provides an effective way to improve the electrochemical properties of NVPF and other cathode materials with low electron/ion conductivity for sodium/lithium ion batteries. © 2018 Elsevier Ltd. All rights reserved. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.shsu.edu/phy_gnl/PDF-file-Gan-articles/2018-Electro-Acta-coated-Na-V-PO4-F.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
