Role of Al-doping with different sites upon the structure and electrochemical performance of spherical LiNi_0.5Mn_1.5O₄ cathode materials for lithium-ion batteries.

ABSTRACT: Al-doped spinel LiNi_0.5Mn_1.5O₄ materials with different sites and contents were synthesized by rapid precipitation combined with hydrothermal treatment and calcination. The roles of Al on structural stability and electrochemical performance were studied by utilizing a series of techniques. XRD patterns indicated lower ion diffusion and no impure phased in doped samples. FT-IR and CV results reveal that Al-doped materials possess a Fd3̄m space group with increased disorder and increasing amounts of Mn³⁺. SEM and TEM equipped with EDS were used to characterize the regular morphology accompanied by a complete crystal structure and homogeneous distribution of elements. The Al content at the Ni, Mn, and Ni/Mn sites was optimized to be 5%

SUBMITTER: Chen A 

PROVIDER: S-EPMC9063712 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature