Thermal sensitive flexible phase change materials with high thermal conductivity for thermal energy storage

Li, Wanwan; Cheng, Wen‐Long; Xie, Biao; Liu, Na; Zhang, Lisong

doi:10.1016/j.enconman.2017.07.019

Cited by 110 publications

(35 citation statements)

References 42 publications

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“…The high thermal conductivity enhancement of the resultant PEG@PU‐RGNPs composites can be explained by two mechanisms. First, different from conventional preparation methods, [ 32–35 ] the inherent large‐size RGNPs structure of the EG matrix has maintained to construct large‐scale heat transfer pathways. [ 36 ] On the other hand, the interfacial thermal resistance between adjacent RGNPs and PCM in the compact PCCs can be greatly reduced by employing pressure‐induced directional compression assemble strategy, which thus boost the transmission of phonons and reduce the overall thermal resistance.…”

Section: Resultsmentioning

confidence: 99%

Dual‐Encapsulated Highly Conductive and Liquid‐Free Phase Change Composites Enabled by Polyurethane/Graphite Nanoplatelets Hybrid Networks for Efficient Energy Storage and Thermal Management

Wang

et al. 2021

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Phase change materials (PCMs) are regarded as promising candidates for realizing zero‐energy thermal management of electronic devices owing to their high thermal storage capacity and stable working temperature. However, PCM‐based thermal management always suffers from the long‐standing challenges of low thermal conductivity and liquid leakage of PCMs. Herein, a dual‐encapsulation strategy to fabricate highly conductive and liquid‐free phase change composites (PCCs) for thermal management by constructing a polyurethane/graphite nanoplatelets hybrid networks is reported. The PCM of polyethylene glycol (PEG) is first infiltrated into the cross‐linked network of polyurethane (PU) to synthesize hybridized semi‐interpenetrated composites (PEG@PU), and then incorporated with reticulated graphite nanoplatelets (RGNPs) via pressure‐induced assembly to fabricate highly conductive PCCs (PEG@PU‐RGNPs). The hybrid networks enable the PCCs to show excellent mechanical strength, liquid‐free phase change, and stable thermal property. Notably, the dual‐encapsulated PCCs exhibit high thermal and electrical conductivities up to 27.0 W m−1 K−1 and 51.0 S cm−1, superior to the state‐of‐the‐art PEG‐based PCCs. Furthermore, the PCC‐based energy device is demonstrated for efficient battery thermal management toward versatile demands of active preheating at a cold environment and passive cooling at a hot ambient. Overall, this work provides a promising route for fabricating highly conductive and liquid‐free PCCs toward thermal management.

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Section: Resultsmentioning

confidence: 99%

Dual‐Encapsulated Highly Conductive and Liquid‐Free Phase Change Composites Enabled by Polyurethane/Graphite Nanoplatelets Hybrid Networks for Efficient Energy Storage and Thermal Management

Wang

et al. 2021

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“…35 When exceeding the melting point of PCM, the liquid phase results in a significant change in the chain mobility of the continuous phase. Li et al 36 prepared a thermally sensitive flexible PCM by OBC, which could maintain the physical cross-linked network and elasticity well in CPCM; it also presented a stable shape and thermal-induced flexibility with the melting point of PA as the stimulus. Wu et al 37 had designed a form-stable OBC-based CPCM; it displayed a good thermally induced flexible performance.…”

Section: Introductionmentioning

confidence: 99%

Pouch Lithium Battery with a Passive Thermal Management System Using Form-Stable and Flexible Composite Phase Change Materials

Huang

Zhang

et al. 2021

ACS Appl. Energy Mater.

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Paraffin (PA) as a phase change material (PCM) has become one of the research hotspots for battery thermal management systems owing to its high latent heat, low cost, simple structure, and other merits. However, it has been inevitably restricted by its low thermal conductivity, heat-storage saturation, and poor adaptability, especially for a battery module. In this study, a novel form-stable and flexible composite PCM (CPCM) with high latent heat has been successfully prepared; styrene−butadiene−styrene (SBS) and thermoplastic ester elastomer (TPEE) as the supporting skeleton material and collaborative packaging material can effectively improve the flexibility and deformation of CPCM. Besides, expanded graphite (EG) is utilized to enhance the heat-dissipating capacity and balance the temperature difference. The results indicate that CPCM has good physical and chemical compatibility, and it can also achieve stable deformation performance such as bending and stretching without fracture, which are beneficial to reduce thermal contact resistance and improve external force resist as a buffer layer. Besides, the thermal management system with TPEE-SBS/EG/PA for the battery module can exhibit an excellent temperature-controlling performance. Thus, it should be concluded that the form-stable and flexible CPCM can be used for a long-term thermal management system and has potential application prospects in heat storage and other fields.

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“…The vermicular graphite can incorporate with each other to strengthen its softness, resilience and plasticity. To solve the strong rigidity and low thermal conductivity issues of pristine PCMs, Li et al. (2017) fabricated thermal sensitive flexible composite PCMs by using olefin block copolymer (OBC) and EG instead of conventional supporting materials to encapsulate paraffin ( Figure 11 A).…”

Section: Advanced Flexible Composite Pcmsmentioning

confidence: 99%

Section: Advanced Flexible Composite Pcmsmentioning

confidence: 99%

Flexible engineering of advanced phase change materials

et al. 2022

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Thermal sensitive flexible phase change materials with high thermal conductivity for thermal energy storage

Cited by 110 publications

References 42 publications

Dual‐Encapsulated Highly Conductive and Liquid‐Free Phase Change Composites Enabled by Polyurethane/Graphite Nanoplatelets Hybrid Networks for Efficient Energy Storage and Thermal Management

Dual‐Encapsulated Highly Conductive and Liquid‐Free Phase Change Composites Enabled by Polyurethane/Graphite Nanoplatelets Hybrid Networks for Efficient Energy Storage and Thermal Management

Pouch Lithium Battery with a Passive Thermal Management System Using Form-Stable and Flexible Composite Phase Change Materials

Flexible engineering of advanced phase change materials

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