One-Pot Bottom-Up Synthesis of SiO<sub>2</sub> Quantum Dots and Reduced Graphene Oxide (rGO) Nanocomposite as Anode Materials in Lithium-Ion Batteries
Here, crystalline SiO<sub>2</sub> quantum dots (QDs) of 3–5 nm size were grown within the layers of reduced graphene oxide (rGO) by a solution mode chemical growth process at a relatively low temperature (100 °C). The composite was applied as a negative electrode in a Li-ion half-cell ba...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-03-01
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| Series: | C |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2311-5629/11/1/23 |
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| Summary: | Here, crystalline SiO<sub>2</sub> quantum dots (QDs) of 3–5 nm size were grown within the layers of reduced graphene oxide (rGO) by a solution mode chemical growth process at a relatively low temperature (100 °C). The composite was applied as a negative electrode in a Li-ion half-cell battery and the electrochemical investigation confirmed a distinct first-cycle discharge/charge capacity (~865 mAhg<sup>−1</sup>/387 @ 51 mAg<sup>−1</sup>). The battery could retain a capacity of 296 mAhg<sup>−1</sup> after 60 charge/discharge cycles with 99% coulombic efficiency. Furthermore, at a high current rate of 1.02 Ag<sup>−1</sup>, the battery was able to display an apparent rate capability (214.47 mAhg<sup>−1</sup>), indicating the high chemical and mechanical stability of the composite at a high current rate. A structural analysis revealed clear distinct diffraction peaks of SiO<sub>2</sub> and high-resolution transmission electron microscopy images showed discrete atomic planes, thereby confirming the growth of crystalline SiO<sub>2</sub> QDs within the layers of rGO. |
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| ISSN: | 2311-5629 |