文献类型：期刊文献

英文题名：2D Metallic Abnormal Li2Cl Crystals with Unique Electronic Characteristics Applied in Capacitor and Humidity Sensor

作者：Li, Yunzhang[1];Zhao, Yimin[2];Liu, Xing[1];Qiu, Yinwei[3,4];He, Zhenglin[1];Zhang, Shengli[2];Fang, Haiping[5,6];Chen, Liang[3,4];Zhang, Lei[2];Shi, Guosheng[1,6]

机构：[1]Shanghai Univ, Shanghai Appl Radiat Inst, State Key Lab Adv Special Steel, Shanghai 200444, Peoples R China;[2]Xi An Jiao Tong Univ, Sch Phys, MOE Key Lab Nonequilibrium Synth & Modulat Condens, Xian 710049, Peoples R China;[3]Ningbo Univ, Sch Phys Sci & Technol, Ningbo 315211, Peoples R China;[4]Zhejiang A&F Univ, Dept Opt Engn, Zhejiang Prov Key Lab Carbon Cycling Forest Ecosy, Zhejiang Prov Key Lab Chem Utilizat Forestry Bioma, Linan 311300, Peoples R China;[5]East China Univ Sci & Technol, Sch Sci, Shanghai 200237, Peoples R China;[6]Univ Chinese Acad Sci, Wenzhou Inst, Wenzhou 325001, Peoples R China

年份：2023

卷号：10

期号：6

外文期刊名：ADVANCED MATERIALS INTERFACES

收录：;EI(收录号：20225113256603);WOS:【SCI-EXPANDED(收录号:WOS:000895570500001)】；

基金：Acknowledgements The authors thank Jie Jiang for constructive suggestions. This work was supported by the National Natural Science Foundation of China (U1932123, 12105166, 12074341) the National Science Fund for Outstanding Young Scholars (No. 11922410), and the University of Chinese Academy of Sciences (WIUCASQD2021014). The authors also thank the Instrument Analysis Center of Xi'an Jiaotong University for cryo-EM imaging and XPS analyses.

语种：英文

外文关键词：areal capacitance; cryo-electron microscopy; heterostructure; Li2Cl-rGO membranes; piezoelectricity

摘要：Understanding the configuration and properties of the simplest lithium-ion crystal, the Li-Cl crystal, is essential for developing Li-based electrochemical energy storage and conversion devices. Under ambient conditions, LiCl in a 1:1 stoichiometry is the only known stable form of the Li-Cl crystal, and the corresponding crystals are insulating. Here, using cryo-electron microscopy (cryo-EM) and X-ray photoelectron spectroscopy (XPS), this work reports a novel abnormal 2D Li2Cl crystal in ultra-thin reduced graphene oxide (rGO) membranes by simply soaking the rGO membrane in unsaturated LiCl solution under ambient conditions and showed its high-resolution image. Unexpectedly, such Li2Cl crystal presents metallic properties rather than insulating properties. Using vacuum filtration of the unsaturated LiCl solution through rGO membranes, this work prepares the rGO membranes with high content Li2Cl, displaying a high areal capacitance of 220 mF cm(-2). Remarkably, the Li2Cl-rGO membranes also exhibit heterostructure property and piezoelectricity. For the excess Li and unique electrical characteristics, these Li2Cl-rGO membranes can be used as a humidity sensor. These findings point to possibilities for creating new Li-based materials and fabricating novel high-performance electronic devices, transistors, and sensors.