Revealing the effect of electrolyte coordination structures on the intercalation chemistry of batteries

作     者：Chao Wang Xianjin Li Guiming Zhong Caixia Meng Shiwen Li Guohui Zhang Yanxiao Ning Xianfeng Li Qiang Fu Chao Wang;Xianjin Li;Guiming Zhong;Caixia Meng;Shiwen Li;Guohui Zhang;Yanxiao Ning;Xianfeng Li;Qiang Fu

作者机构：State Key Laboratory of CatalysisiChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of SciencesBeijing 100049China Department of Chemical PhysicsUniversity of Science and Technology of ChinaHefei 230026AnhuiChina Laboratory of Advanced Spectro-electrochemistry and Li-ion BatteriesDalian Institute of Chemical Physics Chinese Academy of SciencesDalian116023LiaoningChina Division of Energy StorageDalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina 

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

年 卷 期：2023年第81卷第6期

页      面：149-156,I0006页

核心收录：

学科分类：0808[工学-电气工程] 081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：financially supported by the National Key R&D Program of China (2021YFA1502800) the National Natural Science Foundation of China (21825203,22288201,and 91945302) the Photon Science Center for Carbon Neutrality,Liao Ning Revitalization Talents Program (XLYC1902117) the Youth Innovation Fund of Dalian institute of Chemical Physics (DICP I202125) 

主　　题：Operando surface characterization Electrolyte coordination structure De-solvation Intercalation chemistry 

摘      要：In-depth understanding of the electrolyte-dependent intercalation chemistry in batteries through direct operando/in situ characterizations is crucial for the development of the high-performance ***,taking the Al/graphite battery as a model system,the effect of electrolyte coordination structure on the intercalation processes has been investigated over the batteries with either 1-hexyl-3-methylimidazolium chloride(HMICl)-AlCl_(3) or 1-ethyl-3-methylimidazolium chloride(EMICl)-AlCl_(3) ionic liquid electrolyte using operando X-ray photoelectron spectroscopy(XPS)and X-ray *** a weaker anion-cation interaction in HMI-based electrolyte,the XPS-derived atomic ratio between cointercalated N and intercalated Al is 0.9,which is lower than 1.6 for EMI-based *** to the additional de-solvation process,the batteries with the HMI-based electrolyte show a lower ionic diffusion rate,capacity,and cycling performance,which agree with the operando characterization *** findings highlight the critical role of the electrolyte coordination structure on the(co-)intercalation chemistry.