Microstructure and High Temperature Charge-Discharge Characteristics of 3D Additive Manufacturing Produced Mg-Ni Anode

Abstract

This study applied a 3D additive manufacturing technique to produce a stable and high performance Mg-Ni alloy anode for lithium ion batteries. This 3D process used Mg-Ni powders to printed two layers on copper foil to obtain the Mg-Ni anodes directly, the 3D printed anodes have not need the traditional stir-slurry, coating and baking processes, and process the performances of high efficiency and low coat. Experiment results show that Mg₂Ni, MgNi₂ and Mg₂Cu intermetallic compounds (IMC) are benefit for 3D printed anode, the anode can slowly form a dense and thick SEI layer at 55°C high temperature charge-discharge; therefore, a better capacity than at 25°C can be achieved. The 85°C charge-discharge environment makes the volume expansion effect serious, which results in capacity decay slightly. The presented high temperature charge-discharge capacities are higher than that of the commercial lithium battery, demonstrate that 3D additive manufacturing can fabricate the novel alloy electrodes simply and quickly, and that 3D Mg-Ni anodes are very suitable for today’s high-end electronic products.