首页|Rational design of F,N-rich artificial interphase via chemical prelithiation initiation strategy enabling high coulombic efficiency and stable micro-sized SiO anodes

Rational design of F,N-rich artificial interphase via chemical prelithiation initiation strategy enabling high coulombic efficiency and stable micro-sized SiO anodes

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Silicon monoxide(SiO)is regarded as a potential candidate for anode materials of lithium-ion batteries(LIBs).Unfortunately,the application of SiO is limited by poor initial Coulombic efficiency(ICE)and unsteady solid electrolyte interface(SEI),which induce low energy,short cycling life,and poor rate prop-erties.To address these drawbacks of SiO,we achieve in-situ construction of robust and fast-ion conduct-ing F,N-rich SEI layer on prelithiated micro-sized SiO(P-μSiO)via the simple and continuous treatment of μSiO in mild lithium 4,4'-dimethylbiphenyl solution and nonflammable hexafluorocyclotriphosp-hazene solution.Chemical prelithiation eliminates irreversible capacity through pre-forming inactive lithium silicates.Meanwhile,the symbiotic F,N-rich SEI with good mechanical stability and fast Li+per-meability is conductive to relieve volume expansion of μSiO and boost the Li+diffusion kinetics.Consequently,the P-μSiO realizes an impressive electrochemical performance with an elevated ICE of 99.57％and a capacity retention of 90.67％after 350 cycles.Additionally,the full cell with P-μSiO anode and commercial LiFePO4 cathode displays an ICE of 92.03％and a high reversible capacity of 144.97 mA h g-1.This work offers a general construction strategy of robust and ionically conductive SEI for advanced LIBs.

Chemical prelithiationSilicon monoxideSEILithium-ion batteriesInterphase engineering

Quanyan Man、Hengtao Shen、Chuanliang Wei、Baojuan Xi、Shenglin Xiong、Jinkui Feng

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Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education),School of Materials Science and Engineering,Shandong University,Jinan 250061,Shandong,China

School of Chemistry and Chemical Engineering,Shandong University,Jinan 250100,Shandong,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Shandong ProvinceTaishan Scholars Program of Shandong ProvinceTaishan Scholars Program of Shandong Province

5197219862133007ZR2020JQ19tsqn201812002ts20190908

2024

10.1016/j.jechem.2024.01.046

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.92(5)