Abstract
The commercialization of lithium metal anode possessing ultra-high theoretical capacity has been impeded by safety hazards and inadequate cycling lifespan because of the unregulated lithium dendrites. Here, a framework where MOF-derived ZnSe nanoparticles/N-doped carbon nanosheets are attached to 3D flexible carbon cloth (called ZnSe/NC@CC) is developed. This framework functions as a lithium host for mitigating the detrimental effects of lithium dendrites within the cell. The ZnSe and N-doped sites aid in homogenizing lithium nucleation due to the strong lithiophilicity. The ion/electron conducting mixture (Li2Se and Zn) derived from the lithiation of ZnSe is advantageous for the following homogeneous Li+ flux distribution/deposition. Therefore, the Li@ZnSe/NC@CC electrode performs superbly under 1 mA cm−2, with low lithium nucleation overpotential (8 mV) and extended cycling lifespan (2500 h). Moreover, the LiFePO4-based (LFP) cell, utilizing the established anode, achieves an impressive cycling lifespan (over 1200 cycles at 1C, 1C = 170 mAh g−1) and enhanced rate performance (116.7 mAh g−1 at 10C). It is worth mentioning that the cell maintains an excellent capacity retention of 90.3% after 600 cycles even at a low N/P ratio (defined as the ratio of negative to positive capacity) of around 2.2. This research offers valuable insights for creating a dendrite-free anode in high-energy–density lithium batteries.
Published Version
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