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| 论文编号: |
122214O120130061 |
| 第一作者所在部门: |
708组 |
| 中文论文题目: |
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| 英文论文题目: |
A high-rate lithium–sulfur battery assisted by nitrogen-enriched mesoporous carbons decorated with ultrafine La2O3 nanoparticles
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| 论文题目英文: |
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| 作者: |
Fugen
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| 论文出处: |
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| 刊物名称: |
Journal of Materials Chemistry A
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| 年: |
2013
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| 卷: |
1 |
| 期: |
1 |
| 页: |
13283-13289 |
| 联系作者: |
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| 收录类别: |
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| 影响因子: |
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| 摘要: |
Nitrogen-enriched mesoporous carbons (NMCs) were decorated with ultrafine La2O3 nanoparticles via a
simple wet impregnation method. The resulting composites with well developed mesoporous structures,
high nitrogen content and uniform dispersions of La2O3 nanoparticles served as scaffolds to house
sulfur for high rate lithium–sulfur batteries. Apart from their on-site trapping of polysulfides, the La2O3
nanoparticles decorated on the mesoporous carbon framework were also found to have a strong
catalytic effect on sulfur reduction, offering high discharge voltages and fast electrochemical reaction
kinetics. Combining the multiple effects of the well developed mesopores, nitrogen doping and La2O3
nanoparticles, the resulting ternary NMC/La2O3/S nanocomposites can deliver an initial capacity of 1043
mA h g1 at 1 C, which remains at 799 mA h g1 after 100 cycles. Moreover, they still maintain ultrahigh
rate capacities of 579 and 475 mA h g1 at 3 C and 5 C, respectively, after 100 cycles. These
encouraging results suggest that other metal oxides with suitable adsorption and catalytic abilities can
be widely applied to decorate carbon frameworks for use in high rate lithium–sulfur systems. |
| 英文摘要: |
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