J.X. Ma, S.H. Zheng,* F. Zhou, Y.Y. Zhu, P. Das, R. Huang, L.Z. Zhang, X. Wang, H. Wang, Y. Cui, and Z.-S. Wu*

Energy Storage Materials, 2023, 54, 304-312.

DOI: 10.1016/j.ensm.2022.10.036 [PDF]

The revival of Li metal batteries (LMBs) is revolutionizing current Li-ion battery technology. However, their practical applications are prevented by the bottlenecks like Li dendrite growth, low Coulombic efficiency, and mismatched cathodes with limited mass loading and sluggish kinetics, resulting in poor cyclability and low energy density. Here, 3D printed conductive Ti₃C₂T_XMXene scaffolds and porous LiFePO₄lattices are proposed to construct high-mass-loading LMBs with prolonged lifespan and high energy density. The exceptional lithiophilic feature of Ti₃C₂T_Xregulates the uniform deposition of metallic Li, allowing the stable MXene scaffold to achieve an outstanding areal capacity of 30 mAh/cm²at 30 mA/cm²and ultralong cycle lifespan of 4800 h. The full battery is assembled by rationally matching this dendrite-free MXenebasedLi anode with hierarchically conductive LiFePO₄framework withultrahigh mass loading of 171 mg/cm². The as-assembled LMBs deliver unprecedented areal capacity of 25.3 mAh/cm², record-high areal energy density of 81.6 mWh/cm²and improved cycling stability of 500 cycles, breaking through the limitation of thick-film cathodes. Thereby, this work offers a viable strategy for the reasonable fabrication of advanced LMBs.