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Non-solvating fluorosulfonyl carboxylate enables temperature-tolerant lithium metal batteries

作     者:Xianshu Wang Junru Wu Yun Zhao Bin Li Naser Tavajohi Qi Liu Jianguo Duan Ding Wang Peng Dong Yingjie Zhang Baohua Li Xianshu Wang;Junru Wu;Yun Zhao;Bin Li;Naser Tavajohi;Qi Liu;Jianguo Duan;Ding Wang;Peng Dong;Yingjie Zhang;Baohua Li

作者机构:National and Local Joint Engineering Research Center for Lithium-ion Batteries and Materials Preparation TechnologyKey Laboratory of Advanced Battery Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093YunnanChina Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055GuangdongChina School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China School of Chemistry and Materials EngineeringHuizhou UniversityHuizhou 516007GuangdongChina Department of ChemistryUmeåUniversityUmeå90187Sweden College of Materials Science and EngineeringHunan UniversityChangsha 410082HunanChina 

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

年 卷 期:2023年第82卷第7期

页      面:287-295,I0007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:the support from the Key-Area Research and Development Program of Guangdong Province (2020B090919003) the Yunnan Major Scientific and Technological Projects (202202AG050003) the Natural Science Foundation of China (22202078, 51904135,52162030) the Department of Education of Guangdong Province(2020KQNCX082) the Applied Basic Research Foundation of Yunnan Province (202103AA080019) the National Key R&D Program of China (2018YFB01040) the support of the supported by the Testing Technology Center of Materials and Devices of Tsinghua Shenzhen International Graduate School (SIGS) 

主  题:Lithium metal batteries Methyl fluorosulfonyldifluoroacetate Non-solvating Anion-rich solvation Temperature tolerance 

摘      要:Advanced electrolyte engineering is an important strategy for developing high-efficacy lithium(Li)metal batteries(LMBs).Unfortunately,the current electrolytes limit the scope for creating batteries that perform well over temperature ***,we present a new electrolyte design that uses fluorosulfonyl carboxylate as a non-solvating solvent to form difluoroxalate borate(DFOB-)anion-rich solvation sheath,to realize high-performance working of temperature-tolerant *** this optimized electrolyte,favorable SEI and CEI chemistries on Li metal anode and nickel-rich cathode are achieved,respectively,leading to fast Li^(+)transfer kinetics,dendrite-free Li deposition and suppressed electrolyte ***,Li||LiNi_(0.80)Co_(0.15)Al_(0.05)O_(2)batteries with a thin Li foil(50μm)show a long-term cycling lifespan over 400 cycles at 1C and a superior capacity retention of 90%after 200 cycles at 0.5C under 25℃.Moreover,this electrolyte extends the operating temperature from-10 to 30℃and significantly improve the capacity retention and Coulombic efficiency of batteries are improved at high temperature(60℃).Fluorosulfonyl carboxylates thus have considerable potential for use in high-performance and allweather LMBs,which broadens the new exploring of electrolyte design.

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