Flexible liquid metal coil prepared for electromagnetic energy harvesting and wireless charging

作     者：Shen GUO Peng WANG Jichuan ZHANG Wenpeng LUAN Zishuo XIA Lingxiao CAO Zhizhu HE 

作者机构：China Electric Power Research InstituteBeijing 100192China Vehicle EngineeringCollege of EngineeringChina Agricultural UniversityBeijing 100083China Tianjin Microfluidic Technology Co.Ltd.Tianjin 300457China 

出 版 物：《Frontiers in Energy》 (能源前沿（英文版）)

年 卷 期：2019年第13卷第3期

页      面：474-482页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：supported by the State Grid Corporation of China Research Program of Key Technologies of Electromagnetic Power Harvesting and Storage for Sensors in Power Distribution 

主　　题：liquid metal Galinstan flexible coil electromagnetic energy harvesting wireless charging 

摘      要：This paper reported a study on a flexible liquid metal coil (LMC) for electromagnetic collection from the transmission line for self-powered sensor and electromagnetic generation for wireless charging of cellular telephone. The room temperature liquid metal of Galinstan was perfused to elastic silicone tube, which is then terminated with galliumplated copper wire. The asprepared liquid metal wire can sustain stretching, twisting, and bending with large deformation, and has a good electrical contact stability with the external circuit. The LMC based magnetic energy harvester was then designed and demonstrated to collect the magnetic field energy induced by a wire carrying alternating current. The power of 260 mW was obtained for the wire carrying current of 10 A. The flexible toroidal inductor was fabricated and tested for magnetic energy harvesting. The flexible spiralshaped LMC was also designed and demonstrated to power cellular telephone through wireless charging. The present study opens the way for further applications of elastic LMC in electromagnetic energy harvesting and charging.