A solvothermal route to prepare enhanced LiNi0.88Co0.09Al0.03O2 cathode material taking isopropyl alcohol as solvent

Ni-rich cathode material is taking more and more important position in energy storage and conversion because of their high capacity. But the gap between the demanded and actual capacity still hinder the development of electric vehicle industry. Herein, the Ni-rich (Ni content > 85%) cathode material has received extensive concern. In our research, LiNi0.88Co0.09Al0.03O2 was prepared with solvothermal method by two steps. Meanwhile, the different solvents in solvothermal route are investigated. It is found that LiNi0.88Co0.09Al0.03O2 prepared by isopropyl alcohol shows an excellent capacity retention which is up to 82.3% after 100 cycles at 55 °C, much higher than that prepared by ethyl alcohol (64.0%). The enhanced performance could be ascribed to the specific morphology formed in solvothermal period by the proper solvent.