Advanced Nonflammable Localized High-Concentration Electrolyte For High Energy Density Lithium Battery

作     者：Mengmin Jia Chi Zhang Yawei Guo Linshan Peng Xiaoyan Zhang Weiwei Qian Lan Zhang Suojiang Zhang Mengmin Jia;Chi Zhang;Yawei Guo;Linshan Peng;Xiaoyan Zhang;Weiwei Qian;Lan Zhang;Suojiang Zhang

作者机构：CAS Key Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringBeijing Key Laboratory of Ionic Liquids Clean ProcessChinese Academy of SciencesBeijing 100190China School of Chemical EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China School of Chemical EngineeringZhengzhou UniversityZhengzhou 450001China School of Chemical Engineering and TechnologyXi’an Jiaotong UniversityXi’an 710049China Langfang Institute of Process EngineeringChinese Academy of SciencesHebei 065001China 

出 版 物：《Energy & Environmental Materials》 (能源与环境材料（英文）)

年 卷 期：2022年第5卷第4期

页      面：1294-1302页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：financially supported by National Key Research and Development Program of China(No.2019YFA0705603) National Natural Science Foundation of China(No.22078341,No.21808228 and No.21776290) Science Fund for Creative Research Groups of the National Natural Science Foundation of China(No.21921005) S&T Program of Hebei(No.B2020103028) 

主　　题：dual-anion lithium metal battery localized high-concentration electrolyte nonflammable phosphate 

摘      要：The key to realize long-life high energy density lithium batteries is to exploit functional electrolytes capable of stabilizing both high voltage cathode and lithium *** emergence of localized high-concentration electrolytes(LHCEs)shows great promise for ameliorating the above-mentioned interfacial *** this work,a lithium difluoro(oxalate)borate(LiDFOB)based nonflammable dual-anion LHCE is designed and *** in the mixture of trimethyl phosphate(TMP)/1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropylether(D_(2)),the continuously consumption of LiDFOB is suppressed by simply introducing lithium nitrate(LiNO_(3)).Meantime,as most of the TMP molecular are coordinated with Li^(+),the electrolyte does not show incompatibility issue between neither metal lithium nor graphite ***,it demonstrates excellent capability in stabilizing the interface of Ni-rich cathode and regulating lithium deposition *** Li||LiNi_(0.87)Co_(0.08)Mn_(0.05)O_(2)(NCM87)batteries exhibit high capacity retention of more than 90%after 200 cycles even under the high cutoff voltage of 4.5 V,1 C *** study offers a prospective method to develop safe electrolytes suitable for high voltage applications,thus providing higher energy densities.