| Autor: |
Rao, Shun, Wang, Yong, Mao, Peiyuan, Chen, Shutong, Zhang, Zihan, Wang, Yiran, Zhang, Fanchao, Xiao, Pandeng |
| Zdroj: |
Energy & Fuels; June 2021, Vol. 35 Issue: 12 p10274-10283, 10p |
| Abstrakt: |
SnCo@C@Mn3O4yolk–shell hierarchical hybrid nanocubes are successfully fabricated via the thermal reduction of CoSn(OH)6@polydopamine and the subsequent surface-coating of Mn3O4nanoparticles on the carbon layer. In the novel yolk–shelled nanostructures, the multiple SnCo alloy nanocores decrease the size of alloy nanoparticles and provide sufficient sites for the lithiation of Sn. Simultaneously, N-doped carbon as the intermediate layer prevents the agglomeration between SnCo and Mn3O4nanoparticles and thus improves their structural stability. More importantly, Mn3O4nanoparticles reinforce the carbon shell of yolk–shell nanostructures while decreasing the carbon content, resulting in high capacity and outstanding cyclic stability of SnCo@C@Mn3O4nanocubes. With the respective advantages of three nanocomponents and their synthetic effects, SnCo@C@Mn3O4yolk–shell hierarchical hybrid nanocubes show impressive reversible capacity (999 mAh g–1at 0.1A g–1after 300 cycles) and outstanding high-rate cyclic stability (734 mAh g–1at 0.5A g–1after 650 cycles). This study provides new insight into the rational design of novel Sn-based nanocomposites for enhanced electrochemical properties. |
| Databáze: |
Supplemental Index |
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