Superhydrophilic Modified Elastomeric RGO Aerogel Based Hydrated Salt Phase Change Materials for Effective Solar Thermal Conversion and Storage

Xi, Shaobo; Wang, Lingling; Xie, Huaqing; Yu, Wei

doi:10.1021/acsnano.1c08581

Cited by 101 publications

(35 citation statements)

References 43 publications

(57 reference statements)

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“…This indicates that the latent heat of PCMs was released, which greatly delays the time of temperature decrease during the cooling process. This means that the paraffin/Cu@C samples could store more thermal energy during the solar thermal conversion process . The photo-thermal conversion efficiency of composite PCMs was evaluated using the following formula where is the photo-thermal conversion efficiency, is the quality of paraffin/Cu@C composites, is the enthalpy of composite PCMs, is the light intensity (100 mw/m 2 ), represents the illuminated area of the sample (7.0686 cm 2 ), and represents the time of phase transition .…”

Section: Resultsmentioning

confidence: 99%

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Composite Phase Change Material Supported by Cu Nanoparticles@Carbon Porous Matrix for Photo-Thermal Energy Storage

et al. 2022

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The utilization of the paraffin phase change material (PCM) in solar energy storage systems is limited by its low thermal conductivity, easy leakage, and insensitivity to solar energy. In the present study, the solution combustion synthesis method was applied to fabricate a porous carbon matrix that is embedded with Cu nanoparticles (Cu@C). The shape-stabilized composite PCM was prepared by vacuum impregnation of liquified paraffin. The paraffin/Cu@C composite retained a high latent heat storage enthalpy of 148.2 J/g. The thermal conductivity of the composite was increased to 145% compared to that of pure paraffin. Due to the strong capillary absorption feature of the porous matrix, the composite also indicated a good anti-leakage property. Additionally, the Cu@C matrix also endowed the composite PCMs with good photo-thermal transformation capability, implying their potential application in solar thermal energy storage.

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Section: Resultsmentioning

confidence: 99%

“…This means that the paraffin/Cu@C samples could store more thermal energy during the solar thermal conversion process. 39 The photothermal conversion efficiency of composite PCMs was evaluated using the following formula…”

Section: Materials Properties Of Porous Cu@c Andmentioning

confidence: 99%

Composite Phase Change Material Supported by Cu Nanoparticles@Carbon Porous Matrix for Photo-Thermal Energy Storage

et al. 2022

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“…For instance, PEG/rGO aerogel, n -octadecane/rGO aerogel, octadecanoic acid/rGO aerogel, and so on. The studies indicate that rGO aerogel is neutral (the water contact angle is ∼87°). , In addition, there are only a few oxygen-containing functional groups. , Both hydrated salt PCMs and organic PCMs show weak binding to the graphene surface. Tang et al noted that the composite PCMs (PEG/GO) exhibited superior shape stability when using graphene oxide (GO) aerogels prepared from higher oxidized levels of GO, meaning more oxygen-containing functional groups.…”

Section: Introductionmentioning

confidence: 98%

“…The studies indicate that rGO aerogel is neutral (the water contact angle is ∼87°). 23,24 In addition, there are only a few oxygen-containing functional groups. 19,25 Both hydrated salt PCMs and organic PCMs show weak binding to the graphene surface.…”

Section: Introductionmentioning

confidence: 99%

Lipophilic Modified Hierarchical Multiporous rGO Aerogel-Based Organic Phase Change Materials for Effective Thermal Energy Storage

Luo

Zou

Luo

et al. 2022

ACS Appl. Mater. Interfaces

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In the field of thermal energy storage, organic phase change materials (PCMs) are widely used as functional materials to boost thermal applications. However, there is often a tradeoff between constructing shape-stable composite PCMs with high enthalpy value and those with low leakage rates. Here, we proposed a promising scheme to address this issue. A novel hydrogel consisting of reduced graphene oxide (rGO) and covalent organic framework (COF) was prepared via hydrothermal methods, and the rGO–COF ultralight aerogel with a hierarchical porous structure was formed after freeze-drying. The rGO–COF aerogel shows excellent absorption ability and affinity for organic solvents. It can sufficiently adsorb the molten organic PCMs, such as polyethylene glycol (PEG), and synthesize shape-stable composite PCMs with excellent leak resistance. The COF grown on the surface of rGO has a superior affinity for PEG, so rGO–COF aerogel shows an outstanding PEG loading rate of up to 96.1 wt %, which is 1.7 wt % higher than that of rGO aerogel. In addition, the COF effectively reduces the subcooling of PEG/rGO–COF with 20.3%, compared to PEG/rGO. Meanwhile, the prepared PEG/rGO–COF exhibits extremely high enthalpy and relative enthalpy efficiency (164.6 J/g, 97.4%). This demonstrates that a promising direction was highlighte for the preparation of high-enthalpy shape-stable composite organic PCMs in this work.

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“…Phase change materials (PCMs) capable of absorbing and releasing heat energy are attractive for maintaining a constant temperature in the PTM field. However, the inherently solid rigidity and liquid leakage of PCMs hinder their applications in the wearable thermal regulation field. − Numerous form-stable strategies have been committed to improving the packaging efficiency of PCMs, such as the 3D aerogel network, − the polymer-cross-linked skeleton, − microencapsulation, − and others. The aforementioned methods based on capillary absorption in a porous structure still possess leakage threats at high temperature, and the other methods that depend on covalent cross-linking are prone to constrain the movement of molecular chains between amorphous and crystalline phases extensively, leading to deteriorated heat enthalpy of PCM composites.…”

Section: Introductionmentioning

confidence: 99%

A Trimode Thermoregulatory Flexible Fibrous Membrane Designed with Hierarchical Core–Sheath Fiber Structure for Wearable Personal Thermal Management

Wang

Dong

et al. 2022

ACS Nano

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Advanced textiles designed for personal thermal management contribute to thermoregulation in an individual and energy-saving manner. Textiles incorporated with phase changing materials (PCMs) are capable of bridging the supply and demand for energy by absorbing and releasing latent heat. The integration of solar heating and the Joule heating function supplies multidriving resources, facilitates energy charging and storage, and expands the service time and application scenarios. Herein, we report a fibrous membrane-based textile that was developed by designing the hierarchical core−sheath fiber structure for trimode thermal management. Especially, coaxial electrospinning allows an effective encapsulation of PCMs, with high heat enthalpy density (106.9 J/g), enabling the membrane to buffer drastic temperature changes in the clothing microclimate. The favorable photothermal conversion performance renders the membrane with the high saturated temperature of 70.5 °C (1 sun), benefiting from the synergistic effect of multiple light harvesters. Moreover, a conductive coating endows the composite membrane with an admirable electrothermal conversion performance, reaching a saturated temperature of 73.8 °C (4.2 V). The flexible fibrous membranes with the integrated performance of reversible phase change, multi-source-driven heating, and energy storage present great advantages for all-day, energy-saving, and wearable individual thermal management applications.

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Superhydrophilic Modified Elastomeric RGO Aerogel Based Hydrated Salt Phase Change Materials for Effective Solar Thermal Conversion and Storage

Cited by 101 publications

References 43 publications

Composite Phase Change Material Supported by Cu Nanoparticles@Carbon Porous Matrix for Photo-Thermal Energy Storage

Composite Phase Change Material Supported by Cu Nanoparticles@Carbon Porous Matrix for Photo-Thermal Energy Storage

Lipophilic Modified Hierarchical Multiporous rGO Aerogel-Based Organic Phase Change Materials for Effective Thermal Energy Storage

A Trimode Thermoregulatory Flexible Fibrous Membrane Designed with Hierarchical Core–Sheath Fiber Structure for Wearable Personal Thermal Management

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