Effect of two-dimensional graphene oxide on the phase change stability of carbon nanotubes and their application for thermal energy storage
- 27 Downloads
Acid-treated carbon nanotubes have a significant improvement on the phase change behavior of nanofluids through the elimination of supercooling degrees and improvement on thermal conductivity. However, it has been found that these carbon nanotubes aggregated after a single phase change cycle. In this study, this problem has been successfully solved by the incorporation of graphene oxide with acid-treated multi-walled carbon nanotubes (of diameters from 10 to 15 nm) to form an interpenetrated structure of nanofillers with good stability of at least 90 cycles. The efficacy of the carbon nanotubes and graphene oxide nanofillers with different ratios has been demonstrated to shorten the phase change duration of the nanofluids with insignificant reduction to their latent heat. The synergy of two different dimensional nanofillers prevented the aggregation of acid-treated carbon nanotubes without the use of surfactants and achieved high-energy storage capacity and reliability.
KeywordsCarbon nanotubes Graphene oxide Thermal energy storage Cyclic stability Phase change materials
The authors are grateful to the support given by the National Research Foundation, Prime Minister’s Office, Singapore, under its Energy NIC grant (NRF Award No.: NRF-ENIC-SERTD-SMES-NTUJTCI3C-2016), to conduct this study.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- Barreneche C, Fernández AI, Mondragon R, Enrique Julia J, Ventura-Espinosa D, Mata J, Cabeza LF (2018) Influence of nanoparticle morphology and its dispersion ability regarding thermal properties of water used as phase change material. Appl Therm Eng 128:121–126. https://doi.org/10.1016/j.applthermaleng.2017.09.014 CrossRefGoogle Scholar
- Liu Y, Jiangqing W, Chuangjian S, Shichao G, Yongkun G, Quangui P (2017) Nucleation rate and supercooling degree of water-based graphene oxide nanofluids. Appl Therm Eng 115:1226–1236. https://doi.org/10.1016/j.applthermaleng.2016.10.051 CrossRefGoogle Scholar
- Meng P, Zhang Q, Wu Y, Tan Z, Cheng G, Wu X, Zheng R (2017) Room-temperature dielectric switchable nanocomposites advanced functional materials:1701136-n/a doi: https://doi.org/10.1002/adfm.201701136
- Xie H, Wan J, Chen L (2008) Effects on the phase transformation temperature of nanofluids by the nanoparticles. J Mater Sci Technol 24:742Google Scholar