Hierarchical intercalation of tetrafluoroborate anion into graphite electrode from sulfolane

作     者：Yunju Wang Hongyu Wang Yunju Wang;Hongyu Wang

作者机构：State Key Laboratory of Electroanalytical ChemistryChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina School of Applied Chemistry and EngineeringUniversity of Science and Technology of ChinaHefei 230026AnhuiChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2022年第75卷第12期

页      面：378-382,I0010页

核心收录：

学科分类：0808[工学-电气工程] 081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 

基　　金：financially supported by the National Natural Science Foundation of China China(21975251) 

主　　题：Dual-ion batteries Lithium tetrafluoroborate Sulfolane In situ XRD Highly concentrated solutions 

摘      要：The anion storage behavior of graphite positive electrode in a dual-ion battery is closely related to the solvation of anion in the corresponding electrolyte *** classical electrolyte solutions of Li BF_(4)^(-)sulfolane(SL)have long been recognized in the community of lithium batteries and still appear promising in dual-ion ***,the solvation of BF_(4)^(-)by SL has seldom been addressed *** this study,the solvation states of SL-BF_(4)^(-)are adjusted by varying LiBF_(4)concentration or introducing auxiliary salts of LiPF_6or SBPBF_(4)(SBP:spiro-(1,1 )-bipyrrolidinium)in the electrolyte solutions of Li/graphite dualion *** electrochemical storage processes of SL-BF_(4)^(-)anions in graphite electrodes are investigated through in situ X-ray diffraction *** kinds of graphite intercalation compounds(GICs)with contrastive intercalation gallery heights(IGHs)have been discovered,which are ascribed to the storage of different kinds of SL-BF_(4)^(-)anions in graphite *** interactions between ions and SL in the electrolyte solutions are characterized by Fourier transform infrared spectroscopy and then correlated with the performance of Li/graphite cells.