AgCuInCdZn high-entropy alloy nanoparticles-embedded in porous carbon fibers for long-cycling lithium metal anodes

Abstract

One major challenge in lithium metal anodes is to the uncontrollable growth of lithium dendrites while occurring the volume expansion in the long-term cycle. In this work, the porous carbon fibers lithium metal anode loaded with five-component of high entropy alloy (HEA) nanoparticles are synthesized by facile fusion method. Importantly, the HEA nanoparticles provide the lithiophilic properties of electrode and favorable electrical conductivity, which efficiently facilitate the electrochemical reactions and decrease the local current density to inhibit the formation of dendritic, and the porous carbon fibers embedded with the HEA nanoparticles provide adequate space to accommodate the volume expansion during lithium deposition. As a result, the HEA/PCF@Li anode exhibits long cycling over 1200 h at 60 mA cm−2/1 mAh cm−2 in symmetric cells. Besides, the HEA/PCF@Li||NCM-811 full battery shows high CE of 99.5 % with after 200 cycles at 0.1C. The reported a novel idea for high-performance lithium metal battery.