Clean the Ni-Rich Cathode Material Surface With Boric Acid to Improve Its Storage Performance.

ABSTRACT: The existence of residual lithium compounds (RLCs) on the surface of layered Ni-rich materials will deteriorate the electrochemical properties and cause safety problem. This work presents an effective surface washing method to remove the RLCs from LiNi_0.90Co_0.06Mn_0.04O₂ material surface, via ethyl alcohol solution that contains low concentration of boric acid. It is a low-cost process because the filter liquor can be recycled. The optimal parameters including washing time, boric acid concentration, and solid-liquid ratio were systematically studied. It has been determined by powder pH and Fourier transform infrared spectra results that the amount of RLCs was reduced effectively, and the storage performance was significantly enhanced for th

SUBMITTER: Su Y 

PROVIDER: S-EPMC7393980 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature