Boosting reversible charging of Li-ion batteries at low temperatures by a synergy of propylene carbonate-based electrolyte and defective graphite

作     者：Yingqiang Wu Jiao Zhang Jinli Liu Li Sheng Bo Zhang Limin Wang Siqi Shi Li Wang Hong Xu Xiangming He 

作者机构：Institute of Nuclear and New Energy TechnologyTsinghua UniversityBeijing 100084China State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences(CAS)Changchun 130022China China National Quality Supervision and Inspection Center for Industrial Explosive MaterialsNanjing University of Science and TechnologyNanjing 210094China School of Materials Science and EngineeringMaterials Genome InstituteShanghai UniversityShanghai 200444China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2024年第17卷第3期

页      面：1491-1499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）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.22279071,22279070,52073161,and U21A20170) the Ministry of Science and Technology of the People’s Republic of China(Nos.2019YFA0705703 and 2019YFE0100200) Postdoctoral Research Foundation of China(No.2021M701873). 

主　　题：lithium-ion batteries graphite propylene carbonate low-temperature charging 

摘      要：Propylene carbonate(PC)-based electrolytes have exhibited significant advantages in boosting the low-temperature discharging of graphite-based Li-ion batteries.However,it is still unclear whether they can improve the charging property and suppress lithium plating.Studying this topic is challenging due to the problem of electrochemical compatibility.To overcome this issue,we introduced graphite with phase defects.The results show that the pouch-type full batteries using PC-based electrolyte exhibit steady performance over 500 cycles and can be reversibly charged over 30 times at-20℃ with an average Coulombic efficiency of 99.95%,while the corresponding value for the conventional ethylene carbonate(EC)-based electrolyte sample is only 31.20%.This indicates that the use of PC-based electrolyte significantly suppresses lithium plating during low-temperature charging.We further demonstrate that the improved performance is mainly attributed to the unique solvation structure,where PF-6more anions participate in solvation,leading to the formation of a stable F-rich solid state electrolyte interface on the graphite surface and a lower reduction tendency of Li+ions.This work inspires new ideas for the design of PC-based electrolytes for low-temperature charging and fast-charging batteries.