A Promising Phase Change Material with Record High Ionic Conductivity over a Wide Temperature Range of a Plastic Crystal Phase and Magnetic Thermal Memory Effect

Yin Qian, Dong Sheng Shao, Wan Wan Yao, Zhi Yuan Yao, Lifeng Wang, Wen Long Liu, Xiao Ming Ren

科研成果: 期刊稿件文章同行评审

20 引用 (Scopus)

摘要

The emerging organic ion plastic crystals (OIPCs) are the most promising candidates used as solid-state electrolytes in a range of ionic devices. To endow an OIPC with additional functionality may create a new type of material for multifunctional devices. Herein, we present an ion plastic crystal, [EMIm][Ni(mnt)2] (1; [EMIm]+ = 1-ethyl-3-methylimidazolium and mnt2- = maleonitriledithiolate), and its crystal consists of twin dimeric chains of [Ni(mnt)2]- anions, embraced by [EMIm]+ cations. A crystal-to-plastic crystal transformation with a large latent heat that occurred at ∼367/337 K on heating/cooling is confirmed by the differential scanning calorimetry (DSC) technique. The plastic crystal phase in 1, characterized by variable temperature powder X-ray diffraction (PXRD) and optical microscopy images, spans a broad temperature range with ΔT ∼123/153 K on heating/cooling (DSC measurement), and the wide ΔT is relevant to an extra stable anion chain owing to the strong antiferromagnetic (AFM) interactions protecting the chain from collapse in the plastic crystal state. 1 is a single-component ion plastic crystal with a record high ion conductivity, 0.21 S·cm-1, at 453 K. The crystal-to-plastic crystal transformation in 1 is coupled to a bistable magnetic transition to give a multi-in-one multifunctional material. This study provides a creative thought for the design of OIPCs with striking thermal, electrical, and magnetic multifunctionality.

源语言英语
页(从-至)28129-28138
页数10
期刊ACS Applied Materials and Interfaces
12
25
DOI
出版状态已出版 - 24 6月 2020

指纹

探究 'A Promising Phase Change Material with Record High Ionic Conductivity over a Wide Temperature Range of a Plastic Crystal Phase and Magnetic Thermal Memory Effect' 的科研主题。它们共同构成独一无二的指纹。

引用此