Multidimensional defects tailoring local electron and Mg^(2+) diffusion channels for boosting magnesium storage performance of WO_(3)/MoO_(2)  

作　　者：Shiqi Ding Yuxin Tian Jiankang Chen He Lv Amin Wang Jingjie Dai Xin Dai Lei Wang Guicun Li Alan Meng Zhenjiang Li 

机构地区：[1]College of Materials Science and Engineering,Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science,MOE,College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,Shandong,China [2]Qingdao Engineering Research Center for New Metallic Functional Materials,Characteristic Laboratory of Advanced Metal Functional Materials and Processing in Universities of Shandong,Qingdao Binhai University,Qingdao 266555,Shandong,China [3]College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266042,Shandong,China

出　　处：《Journal of Energy Chemistry》2023年第9期476-485,共10页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant No. 52072196, 52002199, 52002200, 52102106;Major Basic Research Program of Natural Science Foundation of Shandong Province under Grant No. ZR2020ZD09;the Natural Science Foundation of Shandong Province under Grant No. ZR2019BEM042, ZR2020QE063;the Innovation and Technology Program of Shandong Province under Grant No. 2020KJA004;the Taishan Scholars Program of Shandong Province under No. ts201511034;Postdoctoral Program in Qingdao under No. QDBSH20220202019;the innovation Capability Improvement Project of Small and Medium-sized Technological Enterprises in Shandong Province under No. 2021TSGC1156;the Financial Support From the Qingdao West Coast New Area Science and Technology Project under No. 2020-104。

摘　　要：Defect engineering presents great promise in addressing lower specific capacity,sluggish diffusion kinetics and poor cycling life issues in energy storage devices.Herein,multidimensional(0D/2D/3D) structural defects are constructed in WO_(3)/MoO_(2) simultaneously via competing for and sharing with O atoms during simple hydrothermal process.OD and 2D defects tailor local electron,activating more sites and generating built-in electric fields to yield ion reservoir,meanwhile,3D defect owning lower anisotropic property tailors Mg^(2+) diffusion channels to fully exploit Mg^(2+) adsorbed sites induced by OD and 2D defects,enhance the kinetics and maintain structural stability.Benefitted from synergistic effect of 0D/2D/3D structural defects,the designed WO_(3)/MoO_(2) shows the higher specific capacity(112.8 mA h g^(-1) at 50 mA g^(-1) with average attenuation rate per cycle of 0.068%),superior rate capability and excellent cycling stability(specific capacity retention of 80% after 1500 cycles at 1000 mA g^(-1)).This strategy provides design ideas of introducing multidimensional structural defects for tailoring local electron and microstructure to improve energy storage property.

关 键 词：Multidimensional defects Local electron tailoring HETEROSTRUCTURE Cathode Magnesium ions batteries 

分 类 号：TB332[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]