Volume 15
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Ye, F., Ge, Z., Ding, Y., & Yang, J. (2014). Multi-walled carbon nanotubes added to Na2CO3/MgO composites for thermal energy storage. Particuology, 15, 56–60. https://doi.org/10.1016/j.partic.2013.05.001
Multi-walled carbon nanotubes added to Na2CO3/MgO composites for thermal energy storage
Feng Ye a, Zhiwei Ge a, Yulong Ding a b, Jun Yang a *
a State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
b Institute of Particle Science and Engineering, School of Process, Environmental and Materials Engineering, University of Leeds, Leeds LS2 9JT, UK
10.1016/j.partic.2013.05.001
Volume 15, August 2014, Pages 56-60
Received 1 November 2012, Revised 10 May 2013, Accepted 23 May 2013, Available online 12 July 2013.
E-mail: jyang@mail.ipe.ac.cn

Highlights

• Na2CO3/MgO composite with added MWCNTs were prepared as PCMs.

• The composite with or without added MWCNTs displayed good thermal stability.

• Thermal conductivity of PCMs increased with the increase of weight fraction of MWNCTs and temperature.


Abstract

Na2CO3/MgO composites with added multi-walled carbon nanotubes (MWCNTs) were prepared and tested as phase change materials (PCMs) for thermal energy storage. Na2CO3/MgO composite PCMs were prepared and their chemical compatibility and thermal stability were studied. MWCNTs introduced with Na2CO3/MgO composite PCMs were also investigated and scanning electron microscopy (SEM) characterization was used to demonstrate the uniform dispersion of MWCNTs in Na2CO3/MgO composite PCMs. The composites with added MWCNTs still display good thermal stability with mass losses lower than 5%. Introducing MWCNTs into composite Na2CO3/MgO PCMs by material formation/calcination significantly enhances the thermal conductivity of the composite PCMs. The thermal conductivity of the composite PCMs was found to increase with an increase in the weight fraction of the added MWCNTs and an increase in the testing temperature. This study may present a promising way to prepare high temperature phase change materials with superior properties such as improved thermal stability.

Graphical abstract
Keywords
Phase change materials; Composite; Multi-walled carbon nanotubes; Thermal conductivity; Chemical compatibility; Thermal energy storage