Using waste Li ion batteries as cathodes in rechargeable Li-liquid batteries

摘要

The rechargeable Li-liquid battery was developed using waste Li ion battery materials immersed in water and used as the liquid cathode. Either the Li metal or Li ions (by the formation Li_xC6 or Li_(4+X)Ti5O_(12)) was harvested from waste Li ion source materials such as a waste anode (Li_xC6), cathode (Li_xFePO4), and electrolyte (LiPF6 in EGDEC) by charging the cell, which then discharged with the waste products in the liquid cathode solution to produce electric energy. When the Li4Ti5O_(12) was used as the anode with the waste products as the cathode in the proposed battery system, a good cycle-life with high coulombic efficiency was observed.