原子分散共定为高配合的一维半孔碳,具有大孔尺寸,用于超稳定的离子存储
Jihao Li1, Nannan Sun2, Le Cao1
1Institute of Nanochemistry and Nanobiology, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, P. R. China.
研究人员开发了高性能离子电池 (PIB) 的单原子化丰富的半孔碳/碳纳米管 (Co-NMC@CNTs). 这种阳极材料显著提高储存能力和循环稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术 纳米技术
背景情况:
- 半孔碳材料是离子电池 (PIB) 的有希望的阳极,因为它们的结构和导电性.
- 然而,大的K+离子半径会导致PIBs运动缓慢和表现不佳.
研究的目的:
- 为高性能PIB开发一种新的阳极材料.
- 为了解决K+离子储存在半孔碳中的动力限制.
主要方法:
- 采用四乙烯基正酸盐介导的联合组装策略,将单个原子固定在配的半孔碳/碳纳米管 (Co-NMC@CNTs) 中.
- 描述包括同步辐射分析和理论模拟.
- 对 PIB 阳极的电化学性能进行了评估.
主要成果:
- Co-NMC@CNTs复合物表现出较大的中孔尺寸 (23.7 nm) 和较高的兴奋剂 (13.6 at.%).
- 的单个原子降低了K+扩散障碍,增加了能量储存场所.
- 电极在100 mA g-1下达到362.3 mAh g-1的可逆容量,并在4000个循环后在1000 mA g-1下保持192.0 mAh g-1的可逆容量.
结论:
- Co-NMC@CNTs复合物显示了PIBs的特殊电化学性能.
- 这项工作为设计高性能半孔碳基电极用于储能提供了新的策略.
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