Lithium extraction from spinel LiMn 2 O 4 with simultaneous preparation of λ-MnO 2 under mild conditions using sodium hypochlorite

Lithium extraction from spinel LiMn 2 O 4 is important because it is both a mainstream LIB cathode and a key precursor for λ-MnO 2 , which is widely used for selective lithium extraction from brines and seawater.