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<p>Due to environmental-friendliness and high-efficiency, electrocaloric effect (ECE) is widely regarded as a refrigeration technology for tomorrow. Herein, utilizing organic-inorganic hybridization strategy, we achieve the largest low-field-driven ECE and highest directly-measured electrocaloric strength (ECS) via packing sphere-like organic cation (CH<sub>3</sub>)<sub>3</sub>NCH<sub>2</sub>Cl<sup>+</sup> (TMCM<sup>+</sup>) into inorganic one-dimension (1-D) CdCl<sub>3</sub> chain framework. Single-crystal X-ray (SC-XRD) diffraction combined with Raman Spectra reveals that the simultaneous order-disorder transition of organic cations and dramatic structure change of inorganic framework are responsible for the large ECE. Moreover, the measured <i>P-E</i> loops and density function theory (DFT) calculations convey that the distinctive electric-field-induced metastable phase and consequential two-step meta-electric transition could lower the transition energy barrier and account for the low driving field. This work shows that the low-symmetry interaction between inorganic framework and organic cations plays a key role in achieving large ECE under low-field, which provides a method for designing high-performance electrocaloric materials via organic-inorganic hybridization.</p>

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Large low-field-driven electrocaloric effect in organic-inorganic hybrid TMCM-CdCl3

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月29日

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  • Yuan Lin,
  • Congcong Chai,
  • Zhijie Liu,
  • Jing Wang,
  • Shifeng Jin,
  • Yurong Yang,
  • Yihong Gao,
  • Munan Hao,
  • Xinyue Li,
  • Yuxuan Hou,
  • Xingyue Ma,
  • Bingjie Wang,
  • Zheng Wang,
  • Yue Kan,
  • Jie Zheng,
  • Yang Bai,
  • Yunzhong Chen,
  • Jirong Sun,
  • Tongyun Zhao,
  • Jia Yan Law,
  • Victorino Franco,
  • Fengxia Hu,
  • Baogen Shen

摘要

Due to environmental-friendliness and high-efficiency, electrocaloric effect (ECE) is widely regarded as a refrigeration technology for tomorrow. Herein, utilizing organic-inorganic hybridization strategy, we achieve the largest low-field-driven ECE and highest directly-measured electrocaloric strength (ECS) via packing sphere-like organic cation (CH3)3NCH2Cl+ (TMCM+) into inorganic one-dimension (1-D) CdCl3 chain framework. Single-crystal X-ray (SC-XRD) diffraction combined with Raman Spectra reveals that the simultaneous order-disorder transition of organic cations and dramatic structure change of inorganic framework are responsible for the large ECE. Moreover, the measured P-E loops and density function theory (DFT) calculations convey that the distinctive electric-field-induced metastable phase and consequential two-step meta-electric transition could lower the transition energy barrier and account for the low driving field. This work shows that the low-symmetry interaction between inorganic framework and organic cations plays a key role in achieving large ECE under low-field, which provides a method for designing high-performance electrocaloric materials via organic-inorganic hybridization.