用于室温热电应用的石墨烯基复合材料
Sonya Harizanova1, Vassil Vulchev2, Radostina Stoyanova1
1Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.
Materials (Basel, Switzerland)
|December 9, 2023
概括
这项研究通过创建石墨烯和氧化物混合复合材料来增强室温热电材料. 优化的复合材料显示了更好的热电性能,为高效的能量转换提供了有前途的途径.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术 纳米技术
背景情况:
- 开发室温热电材料具有挑战性,因为需要优化电导率,热导率和Seebeck系数.
- 混合复合材料提供了一种策略,通过结合不同类型的材料来调整热电特性.
研究的目的:
- 探索基于石墨烯的材料和氧化物之间的混合复合材料的形成.
- 在室温下修改和增强热电性能.
主要方法:
- 选择的石墨烯材料:含有N的减少石墨烯氧化物 (NrGO) 和扩展石墨 (ExGr).
- 选择的氧化物:p型Ca3Co4O9和n型Zn0.995Al0.005O. 这两种氧化物.
- 通过机械削和颗粒加工制成的混合复合材料.
- 热电效率通过测量电阻,西贝克系数和室温导热率来评估.
主要成果:
- 2重%的ExGr或NrGO增强了Ca3Co4O9.9的热电活性.
- 对于Zn0.995Al0.005O,最佳的ExGr含量在5至20重量%之间,以获得增强的热电特性.
- SEM/EDS实验提供了对复合体形态学对热电性质影响的见解.
结论:
- 石墨烯基材料和氧化物的混合复合材料显示出改善室温热电性能的潜力.
- ExGr和NrGO的特定成分和重量百分比显著影响了Ca3Co4O9和Zn0.995Al0.005O的热电效率.
- 这项研究强调了材料形态学在优化热电性质方面的作用.
更多相关视频
04:22Author Spotlight: Advancements in High-Performance Thermoelectric Thin Films Through Radio Frequency Magnetron Sputtering
Published on: May 17, 2024
2.8K
04:09Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics
Published on: August 30, 2024
371
相关概念视频
01:16Thermal Sigmatropic Reactions: Overview
Sigmatropic rearrangements are a class of pericyclic reactions in which a σ bond migrates from one part of a π system to another. These are intramolecular rearrangements where the total number of σ and π bonds remain unchanged.
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in 1,5-hexadiene, referred to as...
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in 1,5-hexadiene, referred to as...
01:22Thermal Insulation in Masonry Walls
In hot, dry climates, the thermal mass of masonry walls can be beneficial, absorbing heat during the day and releasing it at night, thereby stabilizing indoor temperatures. However, in most other climates, additional insulation is necessary to enhance thermal resistance.
External insulation can be applied using an Exterior Insulation and Finish System (EIFS), which involves affixing panels of plastic foam to the wall and covering them with a polymeric stucco reinforced with glass fiber mesh.
External insulation can be applied using an Exterior Insulation and Finish System (EIFS), which involves affixing panels of plastic foam to the wall and covering them with a polymeric stucco reinforced with glass fiber mesh.