Phase change electrolytes for combined electrochemical and thermal energy storage

Jamieson Brechtl; Andrew M. Ullman; Kai Li; Guang Yang; Jagjit Nanda; Kashif Nawaz; Robert L. Sacci

doi:10.1016/j.egyr.2024.03.047

Phase change electrolytes for combined electrochemical and thermal energy storage

Jamieson Brechtl, Andrew M. Ullman, Kai Li, Guang Yang, Jagjit Nanda, Kashif Nawaz, Robert L. Sacci

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Inorganic salt-based phase change materials (PCMs) form the basis of next-generation thermal energy storage technologies that store and release energy at temperatures relevant for regulating energy usage in residential environments. Here, we detail a rational approach for designing a multifunctional electrolyte that stores latent heat using polymer-stabilized sodium sulfate and sodium thiosulfate mixture. This formulated PCM also allows rapid sodium ion transport in both the solid and liquid states. This PCM composite electrolyte was prepared by blending the components at elevated temperatures, forming a viscous liquid that can serve as a gel-electrolyte for Na-ion batteries. The addition of sodium borate as a nucleating agent resulted in a PCM composite electrolyte with fusion enthalpy (120 J/g) and a phase transition centered around 25.0 °C with 11 °C supercooling. This PCM electrolyte showed excellent thermal cycling stability (>10 cycles) that also maintains high ionic conductivity (>10 mS cm⁻¹). We show that the electrolyte enables Na ion cycling of the dual anode/cathode material, Na₂VTi(PO₄)₃. These properties make this composite electrolyte a promising material for multifunctional energy storage devices.

Original language	English
Pages (from-to)	3931-3940
Number of pages	10
Journal	Energy Reports
Volume	11
DOIs	https://doi.org/10.1016/j.egyr.2024.03.047
State	Published - Jun 2024

Funding

This research was supported by laboratory directed research initiative at Oak Ridge National Laboratory. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05\u201300OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).

Keywords

Multifunctional devices
Phase change materials
Sodium ion electrolyte
Thermal energy storage

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10.1016/j.egyr.2024.03.047

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title = "Phase change electrolytes for combined electrochemical and thermal energy storage",

abstract = "Inorganic salt-based phase change materials (PCMs) form the basis of next-generation thermal energy storage technologies that store and release energy at temperatures relevant for regulating energy usage in residential environments. Here, we detail a rational approach for designing a multifunctional electrolyte that stores latent heat using polymer-stabilized sodium sulfate and sodium thiosulfate mixture. This formulated PCM also allows rapid sodium ion transport in both the solid and liquid states. This PCM composite electrolyte was prepared by blending the components at elevated temperatures, forming a viscous liquid that can serve as a gel-electrolyte for Na-ion batteries. The addition of sodium borate as a nucleating agent resulted in a PCM composite electrolyte with fusion enthalpy (120 J/g) and a phase transition centered around 25.0 °C with 11 °C supercooling. This PCM electrolyte showed excellent thermal cycling stability (>10 cycles) that also maintains high ionic conductivity (>10 mS cm−1). We show that the electrolyte enables Na ion cycling of the dual anode/cathode material, Na2VTi(PO4)3. These properties make this composite electrolyte a promising material for multifunctional energy storage devices.",

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author = "Jamieson Brechtl and Ullman, {Andrew M.} and Kai Li and Guang Yang and Jagjit Nanda and Kashif Nawaz and Sacci, {Robert L.}",

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doi = "10.1016/j.egyr.2024.03.047",

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AU - Brechtl, Jamieson

AU - Ullman, Andrew M.

AU - Li, Kai

AU - Yang, Guang

AU - Nanda, Jagjit

AU - Nawaz, Kashif

AU - Sacci, Robert L.

PY - 2024/6

Y1 - 2024/6

N2 - Inorganic salt-based phase change materials (PCMs) form the basis of next-generation thermal energy storage technologies that store and release energy at temperatures relevant for regulating energy usage in residential environments. Here, we detail a rational approach for designing a multifunctional electrolyte that stores latent heat using polymer-stabilized sodium sulfate and sodium thiosulfate mixture. This formulated PCM also allows rapid sodium ion transport in both the solid and liquid states. This PCM composite electrolyte was prepared by blending the components at elevated temperatures, forming a viscous liquid that can serve as a gel-electrolyte for Na-ion batteries. The addition of sodium borate as a nucleating agent resulted in a PCM composite electrolyte with fusion enthalpy (120 J/g) and a phase transition centered around 25.0 °C with 11 °C supercooling. This PCM electrolyte showed excellent thermal cycling stability (>10 cycles) that also maintains high ionic conductivity (>10 mS cm−1). We show that the electrolyte enables Na ion cycling of the dual anode/cathode material, Na2VTi(PO4)3. These properties make this composite electrolyte a promising material for multifunctional energy storage devices.

AB - Inorganic salt-based phase change materials (PCMs) form the basis of next-generation thermal energy storage technologies that store and release energy at temperatures relevant for regulating energy usage in residential environments. Here, we detail a rational approach for designing a multifunctional electrolyte that stores latent heat using polymer-stabilized sodium sulfate and sodium thiosulfate mixture. This formulated PCM also allows rapid sodium ion transport in both the solid and liquid states. This PCM composite electrolyte was prepared by blending the components at elevated temperatures, forming a viscous liquid that can serve as a gel-electrolyte for Na-ion batteries. The addition of sodium borate as a nucleating agent resulted in a PCM composite electrolyte with fusion enthalpy (120 J/g) and a phase transition centered around 25.0 °C with 11 °C supercooling. This PCM electrolyte showed excellent thermal cycling stability (>10 cycles) that also maintains high ionic conductivity (>10 mS cm−1). We show that the electrolyte enables Na ion cycling of the dual anode/cathode material, Na2VTi(PO4)3. These properties make this composite electrolyte a promising material for multifunctional energy storage devices.

KW - Multifunctional devices

KW - Phase change materials

KW - Sodium ion electrolyte

KW - Thermal energy storage

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Phase change electrolytes for combined electrochemical and thermal energy storage

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Keywords

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