Highly conductive phase change composites enabled by vertically-aligned reticulated graphite nanoplatelets for high-temperature solar photo/electro-thermal energy conversion, harvesting and storage

Li, Tingxian; Wu, Minqiang; Wu, Si; Xiang, Shizhao; Xu, Jiaxing; Chao, Jingwei; Yan, Tao; Deng, Tao; Wang, Ruzhu

doi:10.1016/j.nanoen.2021.106338

Cited by 180 publications

(67 citation statements)

References 64 publications

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“…[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. [5,23,37] Although many previous results demonstrated that carbonbased additives can enhance the thermal conductivities of PCMs, the thermal conductivity enhancement shows a huge difference even using the same additive and loading content. [7,19,28,[38][39][40][41] Besides, the fabrication of PCCs with high additive content is still challenging by using conventional methods.…”

Section: Thermal and Electrical Conductivities And Energy Conversion ...mentioning

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: Thermal and Electrical Conductivities And Energy Conversion ...mentioning

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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“…4a) and the sorption area. In order to fully leverage both S4 and S5 concepts, sorbents with anisotropic thermal conductivity 75 and structure that ensure directional water vapor diffusion are required. For instance, vertically aligned pores in the GO-SA matrix produced by the directional freezing casting method 28 could improve the energy and mass efficiency of the entire system.…”

Section: Possible Advancements In System Designsmentioning

confidence: 99%

Sustainable water generation: grand challenges in continuous atmospheric water harvesting

Poredoš

Wang

et al. 2022

Energy Environ. Sci.

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“…Phase-change materials (PCMs) have been widely studied for solar-thermal applications owing to their advantages of maintaining a constant temperature during heat absorption and release and their high energy storage density and thermal efficiency. , Moreover, considering the disadvantages of solar energy utilization, such as intermittency, instability, and time–space mismatch, PCMs with electrothermal conversion abilities are promising solutions that have good application prospects for the thermal management of electronic equipment and as off-peak electricity conversion systems. − Therefore, the development of PCMs with dual photo/electrothermal conversion capabilities is an emerging development trend …”

Section: Introductionmentioning

confidence: 99%

Multienergy-Triggered Composite Phase-Change Materials Based on Graphite Foams Synthesized from Graphite Extracted from Spent Lithium-Ion Batteries

Liu

Zhang

Liu

et al. 2022

ACS Sustainable Chem. Eng.

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Multifunctional composite phase-change materials (CPCMs) with dual photo/electrothermal triggers have great potential for sustainable energy utilization. Photo/electric-triggered CPCMs are usually prepared by compounding graphene or carbon nanotubes with phase-change materials (PCMs). However, the practical applications of such materials are limited by the complexity and cost of common preparation methods for the supporting materials. Herein, a template method is developed to prepare graphite foams (GFs) using easily available graphite powder extracted from spent lithium-ion batteries. Paraffin wax (PW) is subsequently incorporated into the GFs as a PCM to synthesize GF-PW CPCMs with superior photo/electrothermal conversion capacity. The prepared GF-PW CPCMs exhibit high latent enthalpy (173.9 to 209.2 J/g) and excellent shape and thermal stability and cycling ability. The inherent high thermal/electrical conductivity and excellent solar light absorption capacity of the GFs fabricated from graphite powder confer the GF-PW CPCMs with excellent photo/electrothermal conversion performance. In addition, the 1:4 GF-PW CPCMs exhibit the highest thermal conductivity of 1.38 W/(m K), which is up to 4.11 times higher than that of pure PW. This work not only opens up a pathway for the utilization of graphite powder extracted from spent lithium-ion batteries, but also provides a facile low-cost method for preparing CPCMs with potential applications in photo/electrothermal energy storage and conversion.

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Highly conductive phase change composites enabled by vertically-aligned reticulated graphite nanoplatelets for high-temperature solar photo/electro-thermal energy conversion, harvesting and storage

Cited by 180 publications

References 64 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

Sustainable water generation: grand challenges in continuous atmospheric water harvesting

Multienergy-Triggered Composite Phase-Change Materials Based on Graphite Foams Synthesized from Graphite Extracted from Spent Lithium-Ion Batteries

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