In Situ Formed Tribofilms as Efficient Organic/Inorganic Hybrid Interlayers for Stabilizing Lithium Metal Anodes  

作　　者：Shaozhen Huang Kecheng Long Yuejiao Chen Tuoya Naren Piao Qing Xiaobo Ji Weifeng Wei Zhibin Wu Libao Chen 

机构地区：[1]State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,People’s Republic of China [2]College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,People’s Republic of China

出　　处：《Nano-Micro Letters》2023年第12期320-333,共14页纳微快报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(U1904216 and U22A20141);the Natural Science Foundation of Changsha City(kq2208258).

摘　　要：The practical application of Li metal anodes(LMAs)is limited by uncontrolled dendrite growth and side reactions.Herein,we propose a new friction-induced strategy to produce high-performance thin Li anode(Li@CFO).By virtue of the in situ friction reaction between fluoropolymer grease and Li strips during rolling,a robust organic/inorganic hybrid interlayer(lithiophilic LiF/LiC_(6)framework hybridized-CF_(2)-O-CF_(2)-chains)was formed atop Li metal.The derived interface contributes to reversible Li plating/stripping behaviors by mitigating side reactions and decreasing the solvation degree at the interface.The Li@CFO||Li@CFO symmetrical cell exhibits a remarkable lifespan for 5,600 h(1.0 mA cm^(-2)and 1.0 mAh cm^(-2))and 1,350 cycles even at a harsh condition(18.0 mA cm^(-2)and 3.0 mAh cm^(-2)).When paired with high-loading LiFePO4 cathodes,the full cell lasts over 450 cycles at 1C with a high-capacity retention of 99.9%.This work provides a new friction-induced strategy for producing high-performance thin LMAs.

关 键 词：Lithium metal anode Organic/inorganic hybrid interlayers High current density Fluoropolymer grease Local desolvation environment 

分 类 号：TM912[电气工程—电力电子与电力传动]