在高表面积碳中储存气:实验性地证明了兴奋剂对的影响
Yongde Xia1, Gavin S Walker, David M Grant
1Division of Fuels and Power Technology, Faculty of Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom.
Journal of the American Chemical Society
|October 27, 2009
概括
碳材料的兴奋剂会影响的储存. 虽然在低吸收时有利,但在更高水平时变得有害,特别是在考虑微孔表面积时.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 物理化学 物理化学
背景情况:
- 高表面积的碳材料对于储存至关重要.
- 兴奋剂是一种增强吸收的潜在策略.
- 了解材料特性和兴奋剂之间的关系至关重要.
研究的目的:
- 为了研究兴奋剂对高表面积碳材料中吸收的影响.
- 为了将储能能力与特定材料特性 (如微孔性) 相关联起来.
- 为了评估兴奋剂对吸附热力学的影响.
主要方法:
- 合成含和无的,具有受控质地特性的,以热为模板的碳.
- 表面积,毛孔体积和微毛孔性的表征.
- 测量吸收和吸附的同质热量.
主要成果:
- 含和无碳的表面积 (1900-3700 m2/g) 和孔积 (0.99-1.88 cm3/g) 高.
- 兴奋剂对吸收的影响在与微孔表面积和体积相关时是显著的,而不是总孔隙度.
- 兴奋剂在低覆盖率上增强了的吸收,但在高覆盖率上降低了它.
结论:
- 兴奋剂对储存的影响取决于覆盖范围,并与微孔特征相关.
- 这些发现与理论预测一致,为设计用于储存的先进碳材料提供了洞察力.
- 优化含量和材料多孔性是高效储能应用的关键.
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