Enhanced specific heat capacity of molten salt-based nanomaterials: Effects of nanoparticle dispersion and solvent material

Jo, Byeongnam; Banerjee, Debjyoti

doi:10.1016/j.actamat.2014.05.005

Cited by 114 publications

(71 citation statements)

References 40 publications

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“…However, in a previous study, a similar result was reported for carbonate salt mixture-graphite nanofluids [28]. A nanoparticle concentration of only 0.1 wt % led to a specific heat enhancement of more than 30% for a carbonate salt mixture with almost the same chemical composition of the two salts [20]. In addition, it appeared that the increase of the specific heat was limited even though the nanoparticle concentration increased.…”

Section: Resultsmentioning

confidence: 56%

“…All the chemical agents were used as received. Figure 2 shows the procedures for synthesizing the molten salt-based graphite nanofluids [20,28]. First, graphite nanoparticles were dispersed into distilled water with the GA (1 wt %).…”

Section: Methodsmentioning

confidence: 99%

“…After the water was completely evaporated, the dry power of the molten salt nanofluids was scraped from the entire whole petri dish, and lastly, a grinding and mixing process was performed to obtain a uniform chemical composition of the base fluid. Pure salt mixtures were prepared though the same procedures but were subjected to sonication only once, for 2 h. Figure 2 shows the procedures for synthesizing the molten salt-based graphite nanofluids [20,28]. First, graphite nanoparticles were dispersed into distilled water with the GA (1 wt %).…”

Section: Methodsmentioning

confidence: 99%

“…However, the reason for the increase in the specific heat of molten salt nanofluids has not been clearly investigated. According to previous studies [20,28], the increase of the specific heat of nanofluids is not solely a result of the nanoparticles, but is closely associated with interactions between the nanoparticles and the base fluids. For effectively harnessing thermal energy storage media, such as molten salt mixtures, it is important to understand their specific heat-enhancing mechanism.…”

Section: Introductionmentioning

confidence: 99%

“…A wide range of parametric studies (effects of the nanoparticle concentration, particle shape, size, dispersion quality, etc.) have been performed to identify the mechanism underlying the specific heat increase in the molten salt nanofluids [18][19][20][21][22]. Chieruzzi et al enhanced the specific heat of a binary nitrate (NaNO 3 -KNO 3 ) by dispersing various nanoparticles (Al 2 O 3 , SiO 2 , TiO 2 , and SiO 2 -Al 2 O 3 ) [23,24].…”

Section: Introductionmentioning

confidence: 99%

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Anomalous Increase in Specific Heat of Binary Molten Salt-Based Graphite Nanofluids for Thermal Energy Storage

Kim¹,

Jo²

2018

Applied Sciences

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An anomalous increase of the specific heat was experimentally observed in molten salt nanofluids using a differential scanning calorimeter. Binary carbonate molten salt mixtures were used as a base fluid, and the base salts were doped with graphite nanoparticles. Specific heat measurements of the nanofluids were performed to examine the effects of the composition of two salts consisting of the base fluid. In addition, the effect of the nanoparticle concentration was investigated as the concentration of the graphite nanoparticles was varied from 0.025 to 1.0 wt %. Moreover, the dispersion homogeneity of the nanoparticles was explored by increasing amount of surfactant in the synthesis process of the molten salt nanofluids. The results showed that the specific heat of the nanofluid was enhanced by more than 30% in the liquid phase and by more than 36% in the solid phase at a nanoparticle concentration of 1 wt %. It was also observed that the concentration and the dispersion homogeneity of nanoparticles favorably affected the specific heat enhancement of the molten salt nanofluids. The dispersion status of graphite nanoparticles into the salt mixtures was visualized via scanning electron microscopy. The experimental results were explained according to the nanoparticle-induced compressed liquid layer structure of the molten salts.

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Section: Resultsmentioning

confidence: 56%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Anomalous Increase in Specific Heat of Binary Molten Salt-Based Graphite Nanofluids for Thermal Energy Storage

Kim¹,

Jo²

2018

Applied Sciences

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Nanofluids with Enhanced Heat Transfer Properties for Thermal Energy Storage

Chieruzzi

Miliozzi

Torre

et al. 2016

Intelligent Nanomaterials

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Semi‐Solid CNT@NaK Anode for Potassium Metal Battery

Yuan

Ding

Mou

et al. 2022

Adv Funct Materials

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The CK bond plays a significant role in stabilizing the Na‐K (NaK) alloy electrodes due to the enhancive interfacial affinity. In this study, a method for constructing semi‐solid K metal electrodes with rich CK bonds by in situ replacement of N‐doped carbon nanotubes (CNT) and liquid NaK alloy is proposed. Based on the in situ infrared thermal imaging technique combined with heat calculation, X‐ray photoelectron spectroscopy elemental analysis, and reaction thermodynamic calculation, graphite‐N, which is widely distributed on the wall of CNT, offers plenty of replacement sites for forming CK bonds. Due to the rich bonds, the amount of CNT sharply reduces in dendrite‐free semi‐solid CNT@NaK electrodes and the activity of NaK alloy raises to ≈90%. This discovery provides a new idea for establishing dendrite‐free anodes for K metal batteries.

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Enhanced specific heat capacity of molten salt-based nanomaterials: Effects of nanoparticle dispersion and solvent material

Cited by 114 publications

References 40 publications

Anomalous Increase in Specific Heat of Binary Molten Salt-Based Graphite Nanofluids for Thermal Energy Storage

Anomalous Increase in Specific Heat of Binary Molten Salt-Based Graphite Nanofluids for Thermal Energy Storage

Nanofluids with Enhanced Heat Transfer Properties for Thermal Energy Storage

Semi‐Solid CNT@NaK Anode for Potassium Metal Battery

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