Fan Shuling, Sun Zhongcheng, Liu Can, Ye Fangmin, Liu Meinan
Zhejiang Key Laboratory of Quantum State Control and Optical Field Manipulation, Department of Physics, Zhejiang Sci-Tech University, 310018, Hangzhou, China.
State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Resource, Environments and Materials, Guangxi University, Nanning, 530004, China.
ChemSusChem. 2025 May 5;18(9):e202402472. doi: 10.1002/cssc.202402472. Epub 2025 Jan 16.
Lithium (Li) metal anodes (LMAs), which show a great potential in constructing high-specific-energy-density Li metal batteries (LMBs), have abstracted wide research interest. However, the generation of Li dendrites and the repeated change of volume upon Li plating/stripping severely block the practical commercialization of LMBs. Herein, the functional carbon fibers (CFs) decorated with ZnO embedded carbon cage (ZnO@C-d-CFs) were fabricated successfully by a two-step route including the in-situ growth of Zn-based metal organic frameworks (MOFs) and subsequent carbonization process, which enriched the lithiophilic sites of CFs host and improved Li kinetics of Li plating/stripping. Markedly, our designed ZnO@C-d-CFs possessed an obvious surface stability for Li plating/stripping (e. g., 1000 cycles with a CE of ~100 % for ZnO@C-d-CFs||Li cell, 1200 h for Li-ZnO@C-d-CFs|| Li-ZnO@C-d-CFs cell), and demonstrated a great potential in practical LMBs (e. g., a low-capacity decay of 0.067 mAh g per cycle within the monitored 900 cycles in Li-ZnO@C-d-CFs||LiFePO (LFP) cell). The impressive results verified an effectiveness of surface modification on Li host to boost the stable LMAs.
锂（Li）金属阳极（LMA）在构建高比能量密度的锂金属电池（LMB）方面具有巨大潜力，已引起广泛研究兴趣。然而，锂枝晶的产生以及锂电镀/剥离过程中体积的反复变化严重阻碍了LMB的实际商业化。在此，通过两步法成功制备了装饰有ZnO嵌入碳笼（ZnO@C-d-CFs）的功能化碳纤维（CFs），该方法包括原位生长锌基金属有机框架（MOF）和随后的碳化过程，这丰富了CFs主体的亲锂位点并改善了锂电镀/剥离的锂动力学。值得注意的是，我们设计的ZnO@C-d-CFs在锂电镀/剥离方面具有明显的表面稳定性（例如，ZnO@C-d-CFs||Li电池在CE约为100%的情况下可循环1000次，Li-ZnO@C-d-CFs||Li-ZnO@C-d-CFs电池可循环1200小时），并在实际LMB中显示出巨大潜力（例如，在Li-ZnO@C-d-CFs||LiFePO（LFP）电池中，在监测的900次循环内每循环的低容量衰减为0.067 mAh g）。这些令人印象深刻的结果验证了对锂主体进行表面改性以促进稳定LMA的有效性。
