B-doped nickel-rich ternary cathode material for lithium-ion batteries with excellent rate performance

With the popularity of new energy vehicles, the demand for fast charging and rapid discharge is further increasing. Layered high-nickel ternary materials possess significant potential as cathode materials for electric vehicle batteries due to their high capacity, low cost, and environmental friendliness. In this paper, lithium metaborate, lithium hydroxide, and 90 series high-nickel ternary material precursors were used as raw materials to synthesize a series of B-doped cathode materials with highly textured structures. It is found that B doping can improve the lithium-ion diffusion rate, and the B-modified cathode material also has excellent rate performance, and the 0.5% B-doped cathode material still maintains a discharge specific capacity of 157.13 mAh/g at a discharge rate of 10 C. Additionally, the test of microparticle compressor shows that boron doping can significantly improve the mechanical properties of ternary cathode materials and inhibit the formation of microcracks. In summary, this study puts forward a new idea for the modification of high-nickel ternary cathode materials and promotes the commercialization of high-nickel ternary cathode materials.