Ultrafast presodiation of graphene anodes for high-efficiency and high-rate sodium-ion storage

作     者：Ganyu Zheng Qiaowei Lin Jiabin Ma Jun Zhang Yan-Bing He Xian Tang Feiyu Kang Wei Lv Quan-Hong Yang 

作者机构：Shenzhen Geim Graphene CenterEngineering Laboratory for Functionalized Carbon MaterialsTsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhenChina School of Chemical EngineeringThe University of New South WalesSydneyNew South WalesAustralia Shenzhen Key Laboratory of Information Science and TechnologyTsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhenChina Nanoyang GroupState Key Laboratory of Chemical EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjinChina 

出 版 物：《InfoMat》 (信息材料（英文）)

年 卷 期：2021年第3卷第12期

页      面：1445-1454页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program,Grant/Award Number:2017BT01N111 Guangdong Special Support Program,Grant/Award Number:2017TQ04C664 National Key Research and Development Program of China,Grant/Award Number:2018YFE0124500 National Natural Science Foundation of China,Grant/Award Numbers:51972190,52022041 Shenzhen Basic Research Project,Grant/Award Numbers:JCYJ20180508152019687,JCYJ20180508152037520 Shenzhen Graphene Manufacturing Innovation Center,Grant/Award Number:201901161513 

主　　题：high rate initial Coulombic efficiency presodiation sodium-ion batteries solid electrolyte interphase 

摘      要：The low initial Coulombic efficiency(ICE)is a significant problem hindering the practical uses of carbon anodes in sodium-ion batteries(SIBs),especially for the carbons with large surface *** is an effective way to solve the above problem,but it always needs complicated operations and cannot suppress the unavoidable electrolyte decomposition in the assembled ***,we develop an ultrafast chemical presodiation method for reduced graphene oxide(rGO)using sodium naphthalene(Na-Nt)dissolved in dimethoxyethane(DME)solvent as a presodiation *** presodiation effectively improves the ICE of rGO to 96.8%and forms an artificial solid electrolyte interphase(SEI)on its surface due to the decomposition of the formed complex between Na+and *** formed artificial SEI suppresses the excessive decomposition of electrolytes in the assembled battery,leading to a formation of uniform and inorganic component–rich SEI on rGO surface,which enables a rapid interfacial ion ***,the presodiated rGO showed excellent rate performance with a high capacity of 198.5 mAh g^(-1) at 5 A g^(-1).Moreover,excellent cycle stability indicated by the high capacity retention of 68.4%over 1000 cycles was also achieved,showing the poten-tial to promote the practical uses of high-rate rGO anode in SIBs.