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Undesired Li dendrite growth, unstable solid electrolyte interfaces (SEI), and infinite volume change of metallic Li during cycling greatly limit the practical application of lithium metal batteries (LMBs). Herein, a lithiophilic Ti3C2Tx MXene modified the carbon foam (CF@Ti3C2Tx-MX) is elaborately designed to regulate Li nucleation behaviors and mitigate volume change of lithium metal anode (LMAs) for harvesting highly-stable LMBs. Thereinto, the 3D CF skeleton with a high specific surface area not only reduces the local current density for avoiding concentration polarization, but also provides enough space for relieving volume expansion during the cycling. More importantly, the excellent lithiophilicity of Ti3C2Tx-MX endowed by the abundant functional groups can effectively reduce the Li nucleation overpotential, guide uniform Li deposition without Li dendrites formation, and maintain a stable interface on the anode surface. Consequently, the assembled Li-CF@Ti3C2Tx-MX symmetrical cell exhibits an excellent cycle stability for more than 2400 h with a low overpotential of 9 mV at current density of 4 mA cm-2 with capacity of 1 mA h cm-2. Furthermore, the Li-CF@Ti3C2Tx-MX||NCM111 full cell still delivers capacity of 129.6 mA h g-1 after 330 cycles at 1 C, demonstrating its significance in constructing stable LMAs.
80 views reported since publication in 2023.