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Multiple H‐Bonding Cross‐Linked Supramolecular Solid–Solid Phase Change Materials for Thermal Energy Storage and Management

Chenyang WangSchool of Chemical Engineering Sichuan University Chengdu 610065 ChinaXin GengSchool of Chemical Engineering Sichuan University Chengdu 610065 ChinaJing ChenSchool of Chemical Engineering Sichuan University Chengdu 610065 ChinaHailong WangSchool of Chemical Engineering Sichuan University Chengdu 610065 ChinaZhengkai WeiState Key Laboratory of Polymer Materials Engineering Polymer Research Institute Sichuan University Chengdu 610065 ChinaBingxuan HuangSchool of Chemical Engineering Sichuan University Chengdu 610065 ChinaWei LiuSchool of Chemical Engineering Sichuan University Chengdu 610065 ChinaXiaodong WuSchool of Mechanical Engineering Sichuan University Chengdu 610065 ChinaLinyu HuSchool of Microelectronics Southern University of Science and Technology Shenzhen 518055 ChinaGehong SuCollege of Science Sichuan Agricultural University Ya'an 625000 ChinaJingxin LeiState Key Laboratory of Polymer Materials Engineering Polymer Research Institute Sichuan University Chengdu 610065 ChinaZhimeng LiuSchool of Chemical Engineering Sichuan University Chengdu 610065 ChinaXin HeSchool of Chemical Engineering Sichuan University Chengdu 610065 China

2023en

ABI

Annotatsiya

Abstract Solid–solid phase change materials (SSPCMs) are considered among the most promising candidates for thermal energy storage and management. However, the application of SSPCMs is consistently hindered by the canonical trade‐off between high TES capacity and mechanical robustness. In addition, they suffer from poor recyclability due to chemical cross‐linking. Herein, a straightforward but effective strategy for fabricating supramolecular SSPCMs with high latent heat and mechanical strength is proposed. The supramolecular polymer employs multiple H‐bonding interactions as robust physical cross‐links. This enables SSPCM with a high enthalpy of phase transition (142.5 J g −1 ), strong mechanical strength (36.9 MPa), and sound shape stability (maintaining shape integrity at 120 °C) even with a high content of phase change component (97 wt%). When SSPCM is utilized to regulate the operating temperature of lithium‐ion batteries, it significantly diminishes the battery working temperature by 23 °C at a discharge rate of 3 C. The robust thermal management capability enabled through solid–solid phase change provides practical opportunities for applications in fast discharging and high‐power batteries. Overall, this study presents a feasible strategy for designing linear SSPCMs with high latent heat and exceptional mechanical strength for thermal management.

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Identifikatorlar

DOI: 10.1002/adma.202309723

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