The high performance lithium metal composite anode by excessive alloying process

With the rapid development of technology and the severe environmental crisis, improving the utilization and conversion rate of sustainable energy has become an important way to alleviate ecological and sustainable development. Therefore, the development of a new generation of anode materials with high specific capacity, long cycle life has become the primary task. Elements that can react with lithium and form alloy can be used as electrode materials, but these materials have limited capacity and poor electrochemical property. Lithium metal, as the ideal anode in lithium batteries, are restrained because of the dendrites formation. Herein, we introduced lithium metal composite anode by excessive alloying process, and to some extent, lithium dendrite formation and electrochemical issues are solved. The results show that lithium metal can be deposited evenly on the silver and silicon electrode surface, and both silver and silicon can enhance the coulombic efficiency and improve the electrochemical stability. In particular, silver-lithium composite electrodes can maintain 70 cycles with coulombic efficiency over 60 % which is twice as much as bare Cu electrodes. By this way, we make a new lithium metal composite anode structure and provide excessive alloying process to extend the application of commercial anode.