Miniaturized Measurement System of Effective Thermal Conductivity for Hydrogen Storage Materials

作者：Lee Young Hyo; You Chan Seok; Jeong Hui Chun; Park Mirae; Shim Jae Hyeok; Choi Young Whan; Nahm Kee Suk; Im Yeon Ho^*

来源：Science of Advanced Materials, 2016, 8(1): 3-10.

DOI：10.1166/sam.2016.2588

• Miniaturized Measurement System
• Effective Thermal Conductivity
• Hydrogen Storage Materials

A miniaturized measurement cell of effective thermal conductivity (k(e)) with volume of 15 ml was developed through numerical simulation-aided design. This system has a simplified configuration similar to a transient hot-wire system, and is based on an absolute steady state method. Numerical simulation of heat transfer revealed that k(e) measurement up to 10 W/m K is possible. Various aspects of this system, such as gas pressure and different filling gas, were verified using LaNi5 as a reference material, indicating that this system can measure the k(e) of metal hydride beds with acceptable accuracy. This system was applied to measure the k(e) of pure and Pt-decorated multi-walled carbon nanotubes (MWCNTs), MgH2 powder, and compressed MgH2 with heat transfer matrix. The measured values of k(e) agreed closely with the results reported in previous works.

• 出版日期2016-1