MoC-Modified Metalorganic Framework-Derived Materials Facilitating Dendrite-Free Deposition of Lithium Metal

Abstract

In order to solve the problem of lithium dendrites, which leads to safety problems in lithium-ion batteries, this article starts from the perspective of the substrate itself. The excellent anode material MoC@Cu@C synthesised in the previous stage was compounded with lithium metal by electrochemical deposition. The lithium dendrite inhibition effect, inhibition mechanism and electrochemical performance of the composite anode are then investigated. Thanks to the lithiophilic nature of the nitrogen-doped organic functional groups of the MoC@Cu@C matrix, lithium metal can be uniformly deposited on the surface of the MoC@Cu@C matrix. The synergistic effect of the surface-rich carbon matrix and Cu nanoparticles enhances the migration rate of Li⁺ on the one hand and effectively inhibits the volume expansion of Li metal on the other. The LFP/MoC@Cu@C–Li full cell has excellent cycling stability and rate performance. It has a specific capacity of 100 mAh g⁻¹ even after 150 cycles at a rate of 1 C. The Coulombic efficiency of the entire cycle is also close to 100% and stable cycling is guaranteed even at high current densities of 10 C.