Enhancing the stability of a polycrystalline Ni-rich material upon cycling with an inorganic Li+ conductor binder

material. The key to the process is that the lithium phosphate precursor remains solid until lithium hydroxide melts. The lithium phosphate binder enhances the morphological stability and cycling stability of the polycrystalline material during cycling by increasing its critical pressure. Besides, the lithium phosphate serves as a solid electrolyte, minimizing sluggish kinetics caused by the pseudo-single-crystalline morphology.