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Carbon-Coated $SiO_{2}$ Composites as Promising Anode Material for Li-Ion Batteries
| Content Provider | MDPI |
|---|---|
| Author | Buga, Mihaela-Ramona Spinu-Zaulet, Adnana Ungureanu, Cosmin Mitran, Raul-Augustin Vasile, Eugeniu Florea, Mihaela Neatu, Florentina |
| Copyright Year | 2021 |
| Description | Porous silica-based materials are a promising alternative to graphite anodes for Li-ion batteries due to their high theoretical capacity, low discharge potential similar to pure silicon, superior cycling stability compared to silicon, abundance, and environmental friendliness. However, several challenges prevent the practical application of silica anodes, such as low coulombic efficiency and irreversible capacity losses during cycling. The main strategy to tackle the challenges of silica as an anode material has been developed to prepare carbon-coated $SiO_{2}$ composites by carbonization in argon atmosphere. A facile and eco-friendly method of preparing carbon-coated $SiO_{2}$ composites using sucrose is reported herein. The carbon-coated $SiO_{2}$ composites were characterized using X-ray diffraction, X-ray photoelectron spectroscopy, thermogravimetry, transmission and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, cyclic voltammetry, and charge–discharge cycling. A $C/SiO_{2}$-0.085 M calendered electrode displays the best cycling stability, capacity of 714.3 $mAh·g^{−1}$, and coulombic efficiency as well as the lowest charge transfer resistance over 200 cycles without electrode degradation. The electrochemical performance improvement could be attributed to the positive effect of the carbon thin layer that can effectively diminish interfacial impedance. |
| Starting Page | 4531 |
| e-ISSN | 14203049 |
| DOI | 10.3390/molecules26154531 |
| Journal | Molecules |
| Issue Number | 15 |
| Volume Number | 26 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-07-27 |
| Access Restriction | Open |
| Subject Keyword | Molecules Lithium-ion Batteries Anode Silica Carbon Coating Spray-coating |
| Content Type | Text |
| Resource Type | Article |
