Research progress on lead-iodine-organic-inorganic hybrid antiferroelectric materials in Fujian Institute of Industrial Structures
As the most basic element of electronic devices, electroactive materials for energy storage and conversion have always been an important subject of academic research. Among them, antiferroelectric materials with double hysteresis loop characteristics dominate. Antiferroelectrics are materials in which the dipoles on adjacent ion links are arranged in antiparallel within a certain temperature range, and the macroscopic spontaneous polarization intensity is zero. Unlike ferroelectrics, antiferroelectrics have a very high energy storage capacity, a high energy storage density and a rapid discharge rate. At present, there are two important applications of antiferroelectrics: one is to use the non-linear relationship between the polarization strength and the electric field strength during the phase transition of antiferroelectricity-ferroelectricity, and it is used as an energy storage capacitor and voltage regulating element; -The volume effect of the ferroelectric phase transition is used as a transducer.
The team of Luo Junhua, a researcher of inorganic optoelectronic functional crystal materials at the State Key Laboratory of Structural Chemistry at the Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, has been sponsored by the National Natural Science Foundation of China, the National Outstanding Youth Fund, the Strategic Pilot Project of the Chinese Academy of Sciences, and the National Natural Science Foundation of China Excellent Youth Fund Next, an example of a lead-iodine-based organic-inorganic hybrid antiferroelectric crystal material with the highest Curie temperature (363 K) was constructed for the first time. At the same time, the material exhibits a high energy storage efficiency (83%), comparable to inorganic antiferroelectric ceramics. This research work opened the way for the exploration of new and ordered electronic materials in the future, and promoted their practical application in multifunctional electronic devices. Related research results were recently published in the form of correspondence in the Journal of the American Chemical Society (J. Am. Chem. Soc. 2019, 141, 12470-12474).
Figure: Organic-inorganic hybrid antiferroelectric energy storage materials
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