Authors: Shaozhen Huang, Kecheng Long, Yuejiao Chen, Tuoya Naren, Piao Qing, Xiaobo Ji, Weifeng Wei, Zhibin Wu, Libao Chen
Published: 2023-10-24
DOI: 10.1007/s40820-023-01210-6
Source: Full article
AbstractThe 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/LiC6 framework hybridized -CF2-O-CF2- 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.