Efficient extraction of Li from brine at a low cost is becoming key technology to solve energy and environmental problems. Electrochemical has become research hotspot due its consumption, high selectivity, friendliness. LiMn2O4, LiFePO4, LiNi1/3Co1/3Mn1/3O2 are widely used as cathode materials for the electrochemical but they also have some drawbacks, such small adsorption capacity. In this pap...