Abstract Layered double hydroxides (LDHs) have recently emerged as promising materials for various device applications due to their controllable properties depending on the type or ratio of cations and anions constituting the crystal structure. Despite active research on the electrical, electrochemical, and photochemical applications of LDH nanostructures, their electrical conduction mechanism and the correlation between their temperature-dependent electrical and structural properties have rarely been investigated. Herein, we report on the abnormal temperature-dependent electrical property of the ZnAl-LDHs and verify its origin based on in-situ structural and chemical investigations. The electrical conductivity of the ZnAl-LDHs increased continually with increasing temperature from 25 to 55℃, but then decreased drastically as the temperature was further raised to 115℃. During cooling back to room temperature, the conductivity decreased gradually with decreasing temperature. The temperature-dependent chemical and structural investigations verified that the water content and composition of anions in the ZnAl-LDHs were changed by the temperature variation, which resulted in the abnormal electrical properties of the ZnAl-LDHs.

中文翻译：

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ZnAl 层状双氢氧化物纳米结构中异常的温度依赖性电传导

摘要 层状双氢氧化物 (LDH) 由于其可控性质取决于构成晶体结构的阳离子和阴离子的类型或比例，因此最近成为各种器件应用的有前途的材料。尽管对 LDH 纳米结构的电学、电化学和光化学应用进行了积极的研究，但很少研究它们的导电机制以及它们与温度相关的电学和结构特性之间的相关性。在此，我们报告了 ZnAl-LDHs 的异常温度依赖性电特性，并基于原位结构和化学研究验证了其起源。ZnAl-LDHs的电导率随着温度从25℃升高到55℃不断增加，但随着温度进一步升高到 115℃而急剧下降。在冷却回室温期间，电导率随着温度的降低而逐渐降低。温度相关的化学和结构研究证实，ZnAl-LDHs 中的水含量和阴离子组成因温度变化而改变，导致 ZnAl-LDHs 的电性能异常。