Quantifcation of solvent-mediated host-ion interaction in graphite intercalation compounds for extreme-condition Li-ion batteries  

作　　者：Jia-Zhen Zhao Fu-Da Yu Ji-Huai Wu Zhang Lan Yi-Ming Xie Le-Qing Fan Lan-Fang Que Zhen-Bo Wang 

机构地区：[1]Engineering Research Center of Environment-Friendly Functional Materials,Ministry of Education,Institute of Materials Physical Chemistry,Huaqiao University,Xiamen 361021,Fujian,China [2]MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage,State Key Laboratory of Space Power-Sources,School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China [3]College of Materials Science and Engineering,Shenzhen University,Shenzhen 518071,Guangdong,China

出　　处：《Journal of Energy Chemistry》2025年第2期723-732,I0015,共11页能源化学(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(52372191);the Natural Science Foundation of Fujian Province(2023J05047);the Natural Science Foundation of Xiamen,China(3502Z202372036);the support of the High-Performance Computing Center(HPCC)at Harbin Institute of Technology on first-principles calculations.

摘　　要：Achieving simultaneous fast-charging capabilities and low-temperature adaptability in graphite-based lithium-ion batteries(LIBs)with an acceptable cycle life remains challenging.Herein,an ether-based electrolyte with temperature-adaptive Li^(+)solvation structure is designed for graphite,and stable Li^(+)/solvent co-intercalation has been achieved at subzero.As revealed by in-situ variable temperature(-20℃)X-ray diffraction(XRD),the poor compatibility of graphite in ether-based electrolyte at 25℃is mainly due to the continuous electrolyte decomposition and the in-plane rearrangement below0.5 V.Former results in a significant irreversible capacity,while latter maintains graphite in a prolonged state of extreme expansion,ultimately leading to its exfoliation and failure.In contrast,low temperature triggers the rearra ngement of Li^(+)solvation structu re with stronger Li^(+)/solvent binding energy and sho rter Li^(+)-O bond length,which is conducive for reversible Li^(+)/solvent co-intercalation and reducing the time of graphite in an extreme expansion state.In addition,the co-intercalation of solvents minimizes the interaction between Li-ions and host graphite,endowing graphite with fast diffusion kinetics.As expected,the graphite anode delivers about 84%of the capacity at room temperature at-20℃.Moreover,within6 min,about 83%,73%,and 43%of the capacity could be charged at 25,-20,and-40℃,respectively.

关 键 词：Fast-charging LIBs Low-temperature performance Co-intercalation chemistry Li^(+)solvation structure Interfacial kinetics 

分 类 号：TM912[电气工程—电力电子与电力传动] O646[理学—物理化学]