Caesium doping accelerates the hydration rate of potassium carbonate in thermal energy storage

Jelle Houben; Aleksandr Shkatulov; Henk Huinink; Hartmut Fischer; Olaf Adan

doi:10.1016/j.solmat.2022.112116

Caesium doping accelerates the hydration rate of potassium carbonate in thermal energy storage

Jelle Houben, Aleksandr Shkatulov, Henk Huinink (Corresponding author), Hartmut Fischer, Olaf Adan

Onderzoeksoutput: Bijdrage aan tijdschrift › Tijdschriftartikel › Academic › peer review

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Potassium carbonate has recently been identified as a promising candidate for thermochemical energy storage. However, as for many salt hydrates, its reaction kinetics is relatively slow. K₂CO₃ has a metastable zone, where the reaction is kinetically hindered, which limits the temperature operating window. This work aims to improve the material performance, focusing on two aspects; improving the kinetics outside the metastable zone and reducing the metastable zone width. This work shows that doping with Cs₂CO₃, can improve both. Moreover, it is shown that the dopant enhances the hydration rate by introducing mobility due to local deliquescence. This lays the foundation for further material research using dopants to enhance the performance of salt hydrates.

Originele taal-2	Engels
Artikelnummer	112116
Aantal pagina's	12
Tijdschrift	Solar Energy Materials and Solar Cells
Volume	251
DOI's	https://doi.org/10.1016/j.solmat.2022.112116
Status	Gepubliceerd - mrt. 2023

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Funding Information:
This work was funded by the TKI project Dope4Heat with project number 1507201 and the Dutch Organization for Applied Research (TNO) . This work reflects only the authors view. The authors thank Hans Dalderop and Jef Noijen for their technical support.

Publisher Copyright:
© 2022 The Authors

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title = "Caesium doping accelerates the hydration rate of potassium carbonate in thermal energy storage",

abstract = "Potassium carbonate has recently been identified as a promising candidate for thermochemical energy storage. However, as for many salt hydrates, its reaction kinetics is relatively slow. K2CO3 has a metastable zone, where the reaction is kinetically hindered, which limits the temperature operating window. This work aims to improve the material performance, focusing on two aspects; improving the kinetics outside the metastable zone and reducing the metastable zone width. This work shows that doping with Cs2CO3, can improve both. Moreover, it is shown that the dopant enhances the hydration rate by introducing mobility due to local deliquescence. This lays the foundation for further material research using dopants to enhance the performance of salt hydrates.",

keywords = "Caesium carbonate, Doping, Heat battery, Potassium carbonate, Thermochemical material",

author = "Jelle Houben and Aleksandr Shkatulov and Henk Huinink and Hartmut Fischer and Olaf Adan",

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AU - Houben, Jelle

AU - Shkatulov, Aleksandr

AU - Huinink, Henk

AU - Fischer, Hartmut

AU - Adan, Olaf

PY - 2023/3

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N2 - Potassium carbonate has recently been identified as a promising candidate for thermochemical energy storage. However, as for many salt hydrates, its reaction kinetics is relatively slow. K2CO3 has a metastable zone, where the reaction is kinetically hindered, which limits the temperature operating window. This work aims to improve the material performance, focusing on two aspects; improving the kinetics outside the metastable zone and reducing the metastable zone width. This work shows that doping with Cs2CO3, can improve both. Moreover, it is shown that the dopant enhances the hydration rate by introducing mobility due to local deliquescence. This lays the foundation for further material research using dopants to enhance the performance of salt hydrates.

AB - Potassium carbonate has recently been identified as a promising candidate for thermochemical energy storage. However, as for many salt hydrates, its reaction kinetics is relatively slow. K2CO3 has a metastable zone, where the reaction is kinetically hindered, which limits the temperature operating window. This work aims to improve the material performance, focusing on two aspects; improving the kinetics outside the metastable zone and reducing the metastable zone width. This work shows that doping with Cs2CO3, can improve both. Moreover, it is shown that the dopant enhances the hydration rate by introducing mobility due to local deliquescence. This lays the foundation for further material research using dopants to enhance the performance of salt hydrates.

KW - Caesium carbonate

KW - Doping

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JO - Solar Energy Materials and Solar Cells

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Caesium doping accelerates the hydration rate of potassium carbonate in thermal energy storage

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