假设高表面积的碳具有特殊的储能能力:开放的碳框架
Bogdan Kuchta1, Lucyna Firlej, Ali Mohammadhosseini
1Department of Physics and Astronomy, University of Missouri, Columbia, Missouri 65211, USA. bogdan.kuchta@univ-amu.fr
Journal of the American Chemical Society
|August 18, 2012
概括
新的假设碳结构,称为开放碳框架 (OCF),显示了创纪录的储能能力. 这些OCF具有较高的表面积和边缘位置,可以满足移动应用对吸收的需求.
科学领域:
- 材料科学 材料科学 材料科学
- 物理化学 物理化学
- 纳米技术纳米技术
背景情况:
- 传统的碳中储存依赖于裂孔中的平行石墨烯板.
- 高表面积的碳对于高效的气体吸附和储存至关重要.
研究的目的:
- 研究超越传统模型的新型高表面积碳结构.
- 探索结构功能关系,以增强吸附.
- 确定碳基多孔材料中吸附的物理极限.
主要方法:
- 大法典蒙特卡洛模拟分子吸附的模拟.
- 开发和验证吸附剂-吸附剂相互作用潜力.
- 模拟异热体与活性炭实验数据的比较.
主要成果:
- 石墨烯板块的碎片化会产生开放式碳框架 (OCF),其表面积超过2600 m2/g.
- 在77K和100bar时,OCF实现了创纪录的过量吸附 (75-85g/kg) 和储能 (100-260g/kg).
- 在具有低吸附能量的结构中,吸附是有限的,这表明进一步增强的途径.
结论:
- OCF结构比裂纹形孔提供显著更高的储存量.
- 可合成的OCF可以满足移动应用的吸收要求.
- 这项研究确定了碳材料中吸附的物理极限.
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