Pure Lithium Metal Deposited On A 3-Dimensional Copper Current Collector As An Anode For Lithium-ion Batteries

With the ever-growing demand for more efficient energy storage,Lithium-ion technology needs to evolve rapidly toward more powerful and more compact batteries.Lithium metal based batteries are known to possess the highest performances that could be theoretically reached with an impressive specific capacity of 3861 m Ah.g-1 for Lithium metal.However,the growth of dendrites and theoretical infinite volume changes during charge/discharge cycles are major obstacles in the development of such batteries.In the last few years,many research have focused on finding ways to suppress dendrite formation and revive the Lithium metal technology.The development of 3-Dimensional current collectors for the anode has already proved an efficient solution to avoid formation of dendrites but the processes toward the achievement of such current collectors were usually costly and hardly scalable.In this thesis,a simple route to produce a 3-Dimensional current collector with copper nano-arrays and then electroplate it with pure lithium is presented.The anodes as-prepared demonstrated an impressive 2644 m Ah.g-1 upon first cycle and remained at a good 472 m Ah.g-1 after 300 cycles at a rate of 1C indicating a nonnegligible amelioration due to presence of the 3-Dimensional nano-architecture.SEM observations,Cyclic Voltammetry and EIS measurements were also realized in order to characterize the nanostructure and performances of the electrodes.