Three-in-one fire-retardant poly(phosphate)-based fast ion-conductor for all-solid-state lithium batteries

作     者：Jiaying Xie Sibo Qiao Yuyang Wang Jiefei Sui Lixia Bao He Zhou Tianshi Li Jiliang Wang Jiaying Xie;Sibo Qiao;Yuyang Wang;Jiefei Sui;Lixia Bao;He Zhou;Tianshi Li;Jiliang Wang

作者机构：School of Chemical Science and TechnologyNational Demonstration Center for Experimental Chemistry and Chemical Engineering EducationYunnan UniversityKunming 650091YunnanChina 

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

年 卷 期：2023年第80卷第5期

页      面：324-334,I0008页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：the financial support of the National Natural Science Foundation of China(21961044,22169024) the Yunnan Fundamental Research Projects(202105AC160072,202101BC070001-019,202101AT070280,202102AB080017) the Yunnan University’s Research Innovation Fund for graduate students(2021Y394) 

主　　题：Three-in-one Poly(phosphate) Organic fast ion-conductor Solid-state polymer electrolyte Flame-retardant Secondary lithium batteries 

摘      要：The development of flame retardant or nonflammable electrolytes is the key to improve the safety of lithium batteries,owing to inflammable organic solvents and polymer matrix in common liquid and polymer electrolytes regarded as the main cause of battery ***,a series of solid-state polyphosphate oligomers(SPPO)as a three-in-one electrolyte that integrated the roles of lithium salt,dissociation matrix,and flame retardant were *** well-designed SPPO electrolytes showed an optimal ionic conductivity of 5.5×10^(-4)S cm-1at 30℃,an acceptable electrochemical window up to 4.0 V ***/Li+,and lithium ion transference number of *** Li-ion stripping/plating behavior for 500 h of charge-discharge cycles without internal short-circuit in a Li|SPPO|Li cell was confirmed,together with outstanding interface compatibility between the SPPO electrolyte and lithium *** optimal Li|SPPO|LiFePO4cell presented good reversible discharge capacity of 149.4 mA h g-1at 0.1 C and Coulombic efficiency of 96.4%after 120 *** importantly,the prepared SPPO cannot be ignited by the lighter fire and show a limited-oxygen-index value as high as 35.5%,indicating splendid nonflammable *** SPPO could be a promising candidate as a three-in-one solid-state electrolyte for the improved safety of rechargeable lithium batteries.