Molecular patterns in the thermophysical properties of pyridinium ionic liquids as phase change materials for energy storage in the intermediate temperature range

Matuszek, Karolina; Hatton, Corinne; Kar, Mega; Pringle, Jennifer M.; MacFarlane, Douglas R.

doi:10.1016/j.nocx.2022.100108

Cited by 8 publications

(15 citation statements)

References 44 publications

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“…More recently, they reported the thermophysical properties of pyridinium ILs as PCMs for TES in the intermediate temperature range. 395 Ten ILs were synthesized to investigate the influence of cation substituents on the thermophysical properties of ILs. The measurements showed that their melting temperatures varied between 84 and 226 °C and enthalpies of fusion covered a wide spectrum from 38 to 190 J•g −1 .…”

Section: Ils As Phase-change Materials For Thermal Energy Storagementioning

confidence: 99%

“…This indicates that a diverse range of thermophysical properties can be achieved by only a small alternation of the IL structures. Among all the studied materials, 395 Due to their high enthalpy of fusion, they can be used for different TES applications considering the required working temperature because their melting points are 208 °C. Figure 21 presents the melting points and enthalpies of fusion of reported IL-PCMs.…”

Section: Ils As Phase-change Materials For Thermal Energy Storagementioning

confidence: 99%

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Energy Applications of Ionic Liquids: Recent Developments and Future Prospects

Zhou,

Gui,

Sun

et al. 2023

Chem. Rev.

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Ionic liquids (ILs) consisting entirely of ions exhibit many fascinating and tunable properties, making them promising functional materials for a large number of energy-related applications. For example, ILs have been employed as electrolytes for electrochemical energy storage and conversion, as heat transfer fluids and phase-change materials for thermal energy transfer and storage, as solvents and/or catalysts for CO2 capture, CO2 conversion, biomass treatment and biofuel extraction, and as high-energy propellants for aerospace applications. This paper provides an extensive overview on the various energy applications of ILs and offers some thinking and viewpoints on the current challenges and emerging opportunities in each area. The basic fundamentals (structures and properties) of ILs are first introduced. Then, motivations and successful applications of ILs in the energy field are concisely outlined. Later, a detailed review of recent representative works in each area is provided. For each application, the role of ILs and their associated benefits are elaborated. Research trends and insights into the selection of ILs to achieve improved performance are analyzed as well. Challenges and future opportunities are pointed out before the paper is concluded.

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Section: Ils As Phase-change Materials For Thermal Energy Storagementioning

confidence: 99%

Section: Ils As Phase-change Materials For Thermal Energy Storagementioning

confidence: 99%

Energy Applications of Ionic Liquids: Recent Developments and Future Prospects

Zhou,

Gui,

Sun

et al. 2023

Chem. Rev.

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“…Among the protic family of organic salts, which are prepared by proton transfer in a simple acid–base reaction, pyridinium, guanidinium, and pyrazolium-based materials have been studied as possible PCM materials. − , Guanidinium organic salts have melting points between 90 and 227 °C, a notable example being guanidinuim mesylate ( T m = 208 °C, Δ H f = 190 J g –1 ) . Melting points of the pyrazolium-based materials studied are in the range between 91 and 168 °C, which is slightly lower than that reported for guanidinium salts.…”

Section: Emerging Materials Types For Intermediate Temperature Range ...mentioning

confidence: 99%

Phase Change Materials for Renewable Energy Storage at Intermediate Temperatures

et al. 2022

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Thermal energy storage technologies utilizing phase change materials (PCMs) that melt in the intermediate temperature range, between 100 and 220 °C, have the potential to mitigate the intermittency issues of wind and solar energy. This technology can take thermal or electrical energy from renewable sources and store it in the form of heat. This is of particular utility when the end use of the energy is also as heat. For this purpose, the material should have a phase change between 100 and 220 °C with a high latent heat of fusion. Although a range of PCMs are known for this temperature range, many of these materials are not practically viable for stability and safety reasons, a perspective not often clear in the primary literature. This review examines the recent development of thermal energy storage materials for application with renewables, the different material classes, their physicochemical properties, and the chemical structural origins of their advantageous thermal properties. Perspectives on further research directions needed to reach the goal of large scale, highly efficient, inexpensive, and reliable intermediate temperature thermal energy storage technologies are also presented. CONTENTS References R

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Section: ■ Introductionmentioning

confidence: 99%

“…Besides, there is a huge, unexplored potential for structural modifications within this class of compounds related to the different cations and anions used, which allows for fine-tuning of their thermal and physiochemical properties. As potential PCMs, ionic liquids based on imidazolium, − pyrazolium, pyridinium, hydroxyalkylammonium, arylphosphonium, cholinium, , or guanidinium , cations, with counterions such as Br – , [BF 4 ] − , [PF 6 ] − , [NTf 2 ] − , [tartrate] − , [CH 3 SO 3 ] − , and C 8 , C 16 , C 18 carboxylate anions have been the most extensively studied. The majority of these salts possess low to moderate Δ H f (in the range of 50–120 J g –1 ); however, a few organic salts have been recently described, which possess relatively high melting enthalpy, good cycling stability and, additionally, some of them can be prepared from renewable sources .…”

Section: Introductionmentioning

confidence: 99%

Transforming Sugars into Salts─A Novel Strategy to Reduce Supercooling in Polyol Phase-Change Materials

Gaida,

Kondratowicz,

Piper

et al. 2023

ACS Sustainable Chem. Eng.

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Phase-change materials (PCMs) that melt in the intermediate temperature range of 100−220 °C can contribute to the utilization of renewable energy. Compounds rich in hydroxyl groups (e.g., sugar alcohols) are promising materials because of their high energy-storage densities and renewability. However, supercooling and poor stability under operating conditions currently exclude them from practical application as PCMs in the pure form. In this study, we explore a new strategy to encourage the crystallization of sugars by introducing Coulombic interactions into their structures. The thermal properties of the first carbohydrate-based ionic compounds studied as PCMs are reported, focusing on a glucose-based cation and four different anions, namely, Br − [NO 3 ] − , [OMs] − , and [BF 4 ] − . Combining α-D-glucopyranoside, which typically supercools, with the [NO 3 ] − anion resulted in a salt system that crystallized readily during heating/cooling cycles. The role of hydrogen bonding in dictating the thermal properties was examined by single-crystal X-ray diffraction and Hirshfeld surface analyses.

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Molecular patterns in the thermophysical properties of pyridinium ionic liquids as phase change materials for energy storage in the intermediate temperature range

Cited by 8 publications

References 44 publications

Energy Applications of Ionic Liquids: Recent Developments and Future Prospects

Energy Applications of Ionic Liquids: Recent Developments and Future Prospects

Phase Change Materials for Renewable Energy Storage at Intermediate Temperatures

Transforming Sugars into Salts─A Novel Strategy to Reduce Supercooling in Polyol Phase-Change Materials

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