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Enhancing the thermal cyclic reliability of salt-based shape-stabilized phase change materials by in-situ SiO2–C interconnectivity in rice husk carbon

Li, Ziyuan; Wang, Yangjun; Wang, Huan; Zhang, Shuai; Shang, Zhen; Tian, Limei; Yan, Yuying


Ziyuan Li

Yangjun Wang

Huan Wang

Research Associate

Zhen Shang

Limei Tian

Professor of Thermofluids Engineering


Utilizing salt-based shape-stabilized phase change materials (ss-PCMs) for high-temperature thermal energy storage stands as a pivotal avenue in realizing carbon neutrality. However, the performance of ss-PCMs significantly deteriorates after thermal cycling. This study utilizes rice husk carbon (RHC) with an in-situ SiO2-C interconnected structure as the encapsulating material, along with expanded graphite (EG) and MgO, to encapsulate ternary chloride (TC). In this approach, RHC simultaneously acts as a thermal thermal conductivity materials (TCM) and a ceramic supporting material (CCM). The results showed that this encapsulation method can effectively encapsulate up to 65% of TC. The 60wt% TC-10wt% RHC-10wt% EG-20wt% MgO sample named 60T/10R/10E/20M is considered a close to optimal formulation in terms of thermal conductivity and phase change enthalpy. This ss-PCM has a thermal conductivity of 8.86 W•m −1 •K −1 , and phase change enthalpy of 153.6 J· g −1. The ss-PCMs maintained shape stability even after 1000 cycles, with minimal mass loss and thermal conductivity degradation compared to the non-RHC-added ss-PCM. This study has prepared high performance and reliability thermal storage materials through a green and low-cost approach.

Journal Article Type Article
Acceptance Date Jun 9, 2024
Online Publication Date Jun 14, 2024
Publication Date Aug 10, 2024
Deposit Date Jun 14, 2024
Publicly Available Date Jun 15, 2026
Journal Journal of Cleaner Production
Print ISSN 0959-6526
Electronic ISSN 1879-1786
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 466
Article Number 142864
Keywords Rice husk; Thermal cyclic reliability; Ternary chloride; Thermal energy storage
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