Abstract: LiNi_0.5Mn_1.5O₄ cathode material is considered as a promising cathode material due to its advantages of high voltage, cobalt-free and high energy density. But its further application is limited by its poor cyclic stability as the decomposition of electrolyte under high voltage. In this study, LiNi_0.5Mn_1.5O₄ was prepared by low temperature self-propagating combustion method, and then different sugars were used as carbon sources to study the coating modification. The results show that the properties of LiNi_0.5Mn_1.5O₄ composite prepared with chitosan at 400℃/Air is improved significantly. The specific discharge capacity of LiNi_0.5Mn_1.5O₄ composite is 113.3 mA·h/g after 400 cycles at 148 mA·h/g, and the capacity retention rate is 91.07%. This is mainly attributed to the carbon layer on the surface of the material, which improves the electrical conductivity of the material, alleviates the erosion of electrolyte, reduces the electrode reaction polarization, and improves the transport rate of lithium ions. In this study, cheap sugars are used as carbon source, and the synthesis process is simple, which provides a new idea for the application of LiNi_0.5Mn_1.5O₄.