| Autor: |
Li-Lai Liu, Ming-Yang Li, Yi-Han Sun, Xue-Ying Yang, Min-Xuan Ma, Hui Wang, Mao-Zhong An |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Frontiers in Chemistry, Vol 10 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2296-2646 |
| DOI: |
10.3389/fchem.2022.895749 |
| Popis: |
SnO2@C/graphene ternary composite material has been prepared via a double-layer modified strategy of carbon layer and graphene sheets. The size, dispersity, and coating layer of SnO2@C are uniform. The SnO2@C/graphene has a typical porous structure. The discharge and charge capacities of the initial cycle for SnO2@C/graphene are 2,210 mAh g−1 and 1,285 mAh g−1, respectively, at a current density of 1,000 mA g−1. The Coulombic efficiency is 58.60%. The reversible specific capacity of the SnO2@C/graphene anode is 955 mAh g−1 after 300 cycles. The average reversible specific capacity still maintains 572 mAh g−1 even at the high current density of 5 A g−1. In addition, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) are performed to further investigate the prepared SnO2@C/graphene composite material by a microwave hydrothermal method. As a result, SnO2@C/graphene has demonstrated a better electrochemical performance. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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