High porosity and light weight graphene foam heat sink and phase change material container for thermal management

Zehri, Abdelhafid; Samani, Majid Kabiri; Latorre, Martí Gutierrez; Nylander, Andreas; Nilsson, Torbjörn; Fu, Yifeng; Wang, Nan; Ye, Lilei; Liu, Johan

doi:10.1088/1361-6528/aba029

Cited by 22 publications

(10 citation statements)

References 50 publications

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“…When the set power was 1.8 W (3000 W m −2 ), the maximum equilibrium temperature of electrothermal CCGA 80 was about 85.5 °C (room temperature 23.5 °C) shown in Figure 10 a. The electric heating performance of this electrothermal CCGA (the set power of 0.6 W, maximum steady-state temperature of 43.2 °C) under 1000 W m −2 was close to that of the GP foam coated with Ag (0.36 W, 38.0 °C) [ 66 ]. Consequently, this electrothermal CCGA exhibits a relatively steady and efficient electric heating performance.…”

Section: Resultsmentioning

confidence: 79%

A Nanofibrillated Cellulose-Based Electrothermal Aerogel Constructed with Carbon Nanotubes and Graphene

Zhuo¹,

Cao²,

Li³

et al. 2020

Molecules

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Nanofibrillated cellulose (NFC) as an environmentally friendly substrate material has superiority for flexible electrothermal composite, while there is currently no research on porous NFC based electrothermal aerogel. Therefore, this work used NFC as a skeleton, combined with multi-walled carbon nanotubes (MWCNTs) and graphene (GP), to prepare NFC/MWCNTs/GP aerogel (CCGA) via a simple and economic freeze-drying method. The electrothermal CCGA was finally assembled after connecting CCGA with electrodes. The results show that when the concentration of the NFC/MWCNTs/GP suspension was 5 mg mL−1 and NFC amount was 80 wt.%, the maximum steady-state temperature rise of electrothermal CCGA at 3000 W m−2 and 2000 W m−2 was of about 62.0 °C and 40.4 °C, respectively. The resistance change rate of the CCGA was nearly 15% at the concentration of 7 mg mL−1 under the power density of 2000 W m−2. The formed three-dimensional porous structure is conducive to the heat exchange. Consequently, the electrothermal CCGA can be used as a potential lightweight substrate for efficient electrothermal devices.

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Section: Resultsmentioning

confidence: 79%

A Nanofibrillated Cellulose-Based Electrothermal Aerogel Constructed with Carbon Nanotubes and Graphene

Zhuo¹,

Cao²,

Li³

et al. 2020

Molecules

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“…The GFs were used as filler materials for paraffin wax, a common PCM for thermal storage and thermal management applications. [22][23][24][25][26][27] After the removal of the Ni template, the GFs were immersed in melted paraffin wax at 120 C and then cooled down to room temperature to obtain the composite. The thermal transport properties of the composites were measured with the use of laser flash analysis (Netzsch LFA 457 Microflash) and differential scanning calorimetry (Netzsch DSC 404 F1 Pegasus).…”

Section: Thermal Transport Measurements and Resultsmentioning

confidence: 99%

Structural and Synthetic Modification of Graphitic Foams and Dendritic Graphitic Foams for Thermal Management

Jia

Liu

Fan

et al. 2021

Physica Status Solidi (a)

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Porous graphitic foam structures have been explored for applications ranging from electrochemical energy storage devices, [1][2][3][4] packaging and thermal interface materials, [5] reinforced polymer composites, [6] and flexible electronics. [7,8] Because of the high basal-plane thermal conductivity of graphite, porous graphitic foams have been used for thermal management, [9,10] such as providing an interconnected open cellular network to transfer heat from low-thermal conductivity phase change materials (PCMs) filled in the pore space for thermal energy storage. [11][12][13] By overcoming the high interface thermal resistance problem that limits the effective thermal conductivity ðκ e Þ of van der Waals networks of graphitic nanostructures, [11] the 3D continuous porous foam structures achieve considerably higher κ e than the van der Waals networks. Compared with highdensity carbon foams grown by other methods, [14][15][16][17] relatively low-density graphitic foam (GF) grown by chemical vapor deposition (CVD) on reticular nickel (Ni) foam templates is suitable for applications such as PCM thermal energy storage, where the graphite volume fraction (ϕ g ) needs to be controlled to provide both sufficient thermal transport enhancement and only a small reduction of the volume fraction of the energy-storing PCM.However, the thermal performance enhancement by CVD GF grown on reticular Ni foam is limited due to the relatively large pore size, which results in a large distance and resistance for heat flow from the functional materials inside the pore space to the high-thermal conductivity graphitic matrix grown on the sacrificial catalyst template. The low specific surface area associated with the large pores also limits the ϕ g and κ e . If the pore size can be reduced without altering the struct thickness and solid thermal conductivity (κ s ) of the graphite struts, the κ e of the GF is expected to increase together with an increase of the ϕ g . One approach to reducing the pore size is to use sintered Ni powder bed or Ni powder sintered in reticular Ni foam to replace the reticular Ni foam as the catalyst for CVD growth of powder-derived graphite foam (PGF) and hybrid GF-PGF (HGF) structures, respectively. [18] In another approach, carbon nanotubes (CNTs) have been grown on the strut walls of GF to fill the pore space and increase the specific surface area. [13,19] The κ e of these hybrid CNT-GF structures with ϕ g increased to 1.8% is about 2.4 times the value reported for GF with ϕ g of 0.45%. Although the obtained κ e of CNT-GF is still lower than PGF with ϕ g as high as 8%, the high specific surface provided by the additional CNTs yielded enhanced thermal performance, such as improved interfacial thermal transport and additional heterogeneous nucleation sites to suppress subcooling of composite PCMs for thermal energy storage. [13] However, the CNT-GF growth process requires two-step CVD reactions: one for GF growth on the reticular Ni foam template and the other for CNT growth with iron catalyst deposited on ...

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“…Moreover, the study emphasizes the benefit of using a highly porous carbon-based material to benefit from its additional secondary porosity. 15…”

Section: Phase Change Materialsmentioning

confidence: 99%

“…Specifically, GF has sparked great interest in electrical circuits as a thermal management solution. Reference [15] examined the use of such porous materials as containers for PCM and heat sinks. Chemical vapor deposition is used to create GF, which is then adhered to a test chip for heat utilizing sintered silver nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric cooler performance enhancement using thermoelectric generators and their use as a single model to improve the performance of thermal battery management systems for electric vehicles

et al. 2022

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Conventional automobiles that operate on fossil fuels have recently been recognized as one of the significant contributors to environmental pollution, particularly given their increasing numbers in relation to the global population. Electric vehicle (EV) is considered as an excellent solution to this problem. The most difficult challenge is increasing the production of EVs using efficient and affordable batteries. All types of batteries used in EV have a power loss occurs in the form of temperature. The development of a battery thermal management system (BTMS) is a formidable obstacle. The new concept aims to improve the thermoelectric cooler (TEC) efficiency by integrating it with a thermoelectric generator (TEG), which is accomplished by fabricating a TEC‐TEG model. The goal of combining a TEG and a TEC is to utilize waste heat generated on the TEC hot side and convert it into a stream that can be used to feed the TEC and increase its efficiency. Finally, the objectives of this paper are: To investigate the working principle of TEC‐TEG model to regulate EV battery's temperature. To design a hybrid air‐forced TEC‐TEG model for EV batteries. To assess and verify the efficiency of a hybrid TEC‐TEG model in regulating an EV battery temperature.

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High porosity and light weight graphene foam heat sink and phase change material container for thermal management

Cited by 22 publications

References 50 publications

A Nanofibrillated Cellulose-Based Electrothermal Aerogel Constructed with Carbon Nanotubes and Graphene

A Nanofibrillated Cellulose-Based Electrothermal Aerogel Constructed with Carbon Nanotubes and Graphene

Structural and Synthetic Modification of Graphitic Foams and Dendritic Graphitic Foams for Thermal Management

Thermoelectric cooler performance enhancement using thermoelectric generators and their use as a single model to improve the performance of thermal battery management systems for electric vehicles

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