Small Things Make a Big Difference: the Small-molecule Cross-linker of Robust Water-soluble Network Binders for Stable Si Anodes

作     者：WANG Dong LI Zhenwei ZHANG Qian LIU Jie YANG Yu HAN Jishu WANG Lei WANG Dong;LI Zhenwei;ZHANG Qian;LIU Jie;YANG Yu;HAN Jishu;WANG Lei

作者机构：State Key Laboratory Base of Eco-chemical EngineeringTaishan Scholar Advantage and Characteristic Discipline Team of Eco-chemical Process and TechnologyQingdao University of Science and TechnologyQingdao266042P.R.China College of Chemical EngineeringQingdao University of Science and TechnologyQingdao266042P.R.China College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao266042P.R.China Shandong Engineering Research Center for Marine Environment Corrosion and Safety ProtectionCollege of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdao266042P.R.China 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)

年 卷 期：2021年第37卷第2期

页      面：304-310页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.51772162,51802171) the Taishan Scholars Program of China,the Natural Science Foundation of Shandong Province,China(No.ZR2018BB031) the Youth Innovation of Shandong Higher Education Institutions,China(No.2019KJC004) the Outstanding Youth Foundation of Shandong Province,China(No.ZR2019JQ14) 

主　　题：Li-ion battery Si anode Network binder Cross-linker 

摘      要：Silicon(Si)with high theoretical capacity has attracted tremendous attention as the next-generation anode material for Li-ion batteries,but the huge expansion during cycling restricts its practical *** a low-cost,accessible robust network binder is a facile and effective approach to suppress the volume change effect and achieve the commercial application of Si *** previous studies focused on the network binder macromolecule main chain,this manuscript pays attention to the study of small-molecule ***,cross-linked network binders using alginate acid and two kinds of cross-linkers,i.e.,D-sorbitol and isosorbide(Alg-DS and Alg-IS binders)are *** was found that not only the chemical structure of the cross-linker but also the physicochemical property,such as melting point affect greatly the mechanical properties of the network *** a result,the Si anode with an Alg-DS binder dried below the melting point of DS shows the best cycling stability with a high capacity of 2249.8 mA·h/g and a retention rate as high as 95.9%after 100 *** study gives a new view to design robust network binders for stable Si anodes.