Adaptive protection for PEO-based solid electrolyte with chelation of triphenyl phosphite and LiNi 0.8 Co 0.1 Mn 0.1 O 2 .

A PEO-based SPE modified by TPPi has a wide electrochemical window and exhibits excellent electrochemical performance. O and P, with lone pairs of electrons in TPPi, are easily chelated with the Ni with empty orbitals in LiNi 0.8 Co 0.1 Mn 0.1 O 2 , which inhibits Ni/Li cationic disordering and weakens the oxidation of PEO-based electrolytes by Ni 4+ .