Ultrahigh specific surface area of graphene for eliminating subcooling of water

Xing, Li; Chen, Ying; Cheng, Zhengdong; Jia, Lisi; Mo, Songping; Liu, Zhuowei

doi:10.1016/j.apenergy.2014.02.032

Cited by 79 publications

(49 citation statements)

References 22 publications

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“…There is, however, a lack of direct comparison of the performance among the high aspect-ratio carbon nano-additives for aqueous nanofluids, although the effects of graphene and graphene oxide additives on the supercooling degree have been investigated recently by means of isothermal crystallization [37,38]. In order to extend the existing knowledge, this study aims at investigating the effects of both 1-D and 2-D high aspect-ratio carbon nanoadditives on non-isothermal crystallization of aqueous nanofluids.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the presence of nanoparticles may also be able to perform as nuclei in addition to their primary functionality of enhancing the thermal conductivity of nanofluids. In the literature, the freezing point (supercooling degree), latent heat of crystallization, and crystallization kinetics of aqueous nanofluids have been characterized, both isothermally and non-isothermally, for a variety of metallic, metal oxide, and high aspect-ratio carbon nano-additives [27][28][29][30][31][32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

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Non-isothermal crystallization of aqueous nanofluids with high aspect-ratio carbon nano-additives for cold thermal energy storage

Fan¹,

Yao²,

Wang³

et al. 2015

Applied Energy

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Non-isothermal crystallization of aqueous nanofluids with high aspect-ratio carbon nano-additives for cold thermal energy storage

Fan¹,

Yao²,

Wang³

et al. 2015

Applied Energy

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“…The fraction of solidified mass revealed that 50% of phase change material (PCM) was frozen in 25% of the total freezing time for both the water and NFPCM. Li et al [8] adopted the ultrahigh specific surface area of GN as an additive in DI water to reduce the SD of freezing water. SDBS was used to enhance the stability of the nanofluids.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, numerous studies of carbon-based nanomaterials (CBNMs) such as nanocarbons, carbon nanotubes (CNTs), graphene (GN), and graphene oxide (GO) have been conducted, which indicate these materials have high thermal conductivity [28,29], excellent heat transfer performance [30,31], and low SD and freezing duration in phase change process [7][8][9]11]. In addition, CBNMs have high stability and are nonperishable in liquids.…”

Section: Introductionmentioning

confidence: 99%

“…To avoid the aforementioned factors negatively affecting the nucleation rate and SD, researchers have proposed several methods such as adding nucleating agents or undissolved impurities [6][7][8][9][10][11][12], changing the size and shape of the PCMs [13][14][15], inputting external energy (mechanical and ultrasonic vibration) [16,17], increasing the thermal conductivity of the PCMs [18][19][20], reducing the kinematic viscosity of the PCM [20][21][22][23], encapsulating the PCMs [24], and using the porous structure and network of the PCM to enhance their energy storage performance [25,26]. Such methods can effectively suppress SD and improve the energy storage performance of PCMs.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Phase Change Characteristics of Carbon-Based Nanofluids

Teng

Hsiao

et al. 2018

Journal of Nanomaterials

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In this study, carbon-based nanofluids (CBNFs) with the minimized carbon materials (MCMs) were prepared using a graphite powder-based heating and cooling processing method (GP-HCPM). In addition, sodium dodecyl benzenesulfonate (SDBS) was added as a dispersant to enhance the stability of the CBNFs. Two methods, one involving fixed heating and cooling rates and the other involving fixed heating and cooling temperatures, were used to measure and analyze the phase change characteristics of the CBNFs and SDBS aqueous solution in order to evaluate the feasibility of employing CBNFs as phase change materials (PCMs) for cold storage applications. Results revealed that SDBS reduced the thermal conductivity (k) and increased the viscosity (μ), density (ρ), and specific heat (c p ) of the samples; the CBNFs tended to increase the k, μ, and ρ values but reduce the c p values of the samples, compared with water. Furthermore, the SDBS aqueous solution and CBNFs significantly reduced the contact angle of droplets, compared with water. Phase change experiments conducted for all samples revealed that the CBNF sample S4 demonstrated the greatest reduction ratios in onset nucleation time, solidification time, and subcooling degree (38.98%, 11.05%, and 35.41%, resp.); thus, S4 was determined to be the most suitable CBNF for use as a PCM in cold storage applications.

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Supercooled Liquid Ga Stretchable Electronics

Wang

Maslik

Hellman

et al. 2023

Adv Funct Materials

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By controlling the properties of its medium, supercooled liquid Ga (SLGa) based stretchable remains stretchable at −22 °C, i.e., 52 °C below its thermodynamic melting point of Ga. Thus far, our oldest deposited SLGa circuit and film have remained liquids for 2 years at room temperature. The study investigates the crystallization of SLGa triggered by the surface energy of nucleation agents, temperature, circuit cross-section, and mechanical impact. Based on these parameters, a method is presented to integrate electronic components with SLGa circuits without compromising its supercooling effect. Further, the large stiffness variation induced by phase transition is demonstrated in different applications. For the desired stiffness variation, the crystallization rate can be controlled by varying the temperature and cross-section area. Finally, spray-printing an ink of microscale SLGa microscale particles can conformally pattern Ga on a rough surface, e.g., to fabricate a stretchable array of SLGa microelectrodes. A smart patch with stretchable SLGa electrode arrays records human electrocardiogram signals in cold water and does not stain the skin after use. Its low and stable impedance in water will enable novel applications in wearable electronics.

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Ultrahigh specific surface area of graphene for eliminating subcooling of water

Cited by 79 publications

References 22 publications

Non-isothermal crystallization of aqueous nanofluids with high aspect-ratio carbon nano-additives for cold thermal energy storage

Non-isothermal crystallization of aqueous nanofluids with high aspect-ratio carbon nano-additives for cold thermal energy storage

Study on the Phase Change Characteristics of Carbon-Based Nanofluids

Supercooled Liquid Ga Stretchable Electronics

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