Flexible insulating phase change composite film with improved thermal conductivity for wearable thermal management

Zhang, Xinyu; Sun, Keyan; Liu, Hanqing; Chen, Jie; Yan, Xuemei; Kou, Yan; Shi, Quan

doi:10.1016/j.nanoen.2024.109256

Nano Energy

2024

DOI: 10.1016/j.nanoen.2024.109256

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Flexible insulating phase change composite film with improved thermal conductivity for wearable thermal management

Xinyu Zhang,

Keyan Sun,

Hanqing Liu

et al.

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2024

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Cited by 30 publications

References 55 publications

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Scalable Sol–Gel Permeation Assembly of Phase Change Layered Film Toward Thermal Management and Light‐Thermal Driving Applications

Han,

Cheng,

Cheng

et al. 2024

Adv Funct Materials

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Phase change materials (PCMs) are pivotal in thermal energy management and conversion applications owing to their exceptional thermal energy storage and release characteristics. However, persistent challenges such as poor thermal conductivity and leakage issues have impeded their widespread adoption. While existing approaches mitigate these challenges by constructing and incorporating 3D thermal conductive networks, they are constrained by discontinuous preparation methods and mold size limitations. Herein, a scalable sol–gel permeation assembly strategy is proposed to prepare phase change layered film by in situ filling polyethylene glycol (PEG) in aramid nanofibers (ANF)/graphene nanoplates (GNP) network. Befitting from the laminated network encapsulation effect of ANF and GNP, the phase change film demonstrates leak‐free and stable phase transition behavior, even after undergoing 500 heating/cooling cycles. Moreover, the resulting PEG/ANF/GNP layered film exhibits an impressive in‐plane thermal conductivity of 23.7 W mK−1 at GNP loading of 28.1 vol.%, rendering it suitable for thermal management applications in electronic devices. The phase change layered film possesses exceptional photo‐thermal conversion properties, maintaining temperatures exceeding 90 °C under a light power density of 200 mW cm−2. Capitalizing on the thermally induced flexibility of the phase transition film and its temperature‐dependent stiffness, its utility extended to developing a light‐thermal driving gripper.

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Scalable Sol–Gel Permeation Assembly of Phase Change Layered Film Toward Thermal Management and Light‐Thermal Driving Applications

Han,

Cheng,

Cheng

et al. 2024

Adv Funct Materials

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Carbon Nanotube‐Derived Materials for Smart Thermal Management

Liu,

Wang,

Jin

et al. 2024

Advanced Sustainable Systems

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Thermal management involves precisely controlling temperatures in systems, devices, or electronic products to ensure optimal performance, stability, enhanced efficiency, and lifespan, which include high thermal conductivity, superthermal insulation, and active and passive heating. Carbon nanotubes (CNTs), known for their low density, high mechanical strength, and superior thermal and electrical conductivities, represent ideal materials for lightweight, high‐strength applications, showcasing extensive benefits and potential in intelligent thermal management. This review explores the use of CNTs in improving thermal conductivity, insulation, photothermal conversion, and electrical heating, underscoring their unique advantages and broad application prospects in smart thermal management systems. Specifically, the article outlines the advantages of CNT materials in elevating thermal efficiency, enhancing insulation characteristics, and increasing energy conversion rates, offering vital scientific and technical guidance for creating innovative, next‐generation thermal management materials. By systematically analyzing and forecasting, this review provides strategic direction for the research and development of high‐performance thermal management materials, heralding the significant role of CNT materials in future studies.

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Nano‐Enhanced Graphite/Phase Change Material/Graphene Composite for Sustainable and Efficient Passive Thermal Management

Wang,

Mao,

Miljkovic

2024

Advanced Science

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Passive battery thermal management systems (BTMSs) are critical for mitigation of battery thermal runaway (TR). Phase change materials (PCMs) have shown promise for mitigating transient thermal challenges. Fluid leakage and low effective thermal conductivity limit PCM adoption. Furthermore, the thermal capacitance of PCMs diminishes as their latent load is exhausted, creating an unsustainable cooling effect that is transitory. Here, an expanded graphite/PCM/graphene composite that solves these challenges is proposed. The expanded graphite/PCM phase change composite eliminates leakage and increases effective thermal conductivity while the graphene coating enables radiative cooling for PCM regeneration. The composite demonstrates excellent thermal performance in a real BTMS and shows a 26% decrease in temperature when compared to conventional BTMS materials. The composite exhibits thermal control performance comparable with active cooling, resulting in reduced cost and increased simplicity. In addition to BTMSs, this material is anticipated to have application in a plethora of engineered systems requiring stringent thermal management.

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Flexible insulating phase change composite film with improved thermal conductivity for wearable thermal management

Cited by 30 publications

References 55 publications

Scalable Sol–Gel Permeation Assembly of Phase Change Layered Film Toward Thermal Management and Light‐Thermal Driving Applications

Scalable Sol–Gel Permeation Assembly of Phase Change Layered Film Toward Thermal Management and Light‐Thermal Driving Applications

Carbon Nanotube‐Derived Materials for Smart Thermal Management

Nano‐Enhanced Graphite/Phase Change Material/Graphene Composite for Sustainable and Efficient Passive Thermal Management

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