LiFePO₄ (LFP)/Ti3AlC₂(MXene) composites were prepared and then made into ink. Then LFP/MXene cathode was obtained by inkjet printing method. The effects of MXene content on the electrochemical performance of LFP were studied by adjusting the addition ratio of MXene to 2wt%, 3wt%, 4wt%, 5wt%, 6wt%. The results show that with the increase of MXene content, the electrochemical performance increases and then decreases. The optimal performance is obtained when the MXene addition ratio is 4wt%, at which the capacity increases to 181.2 mAh·g^-1, and the Coulomb efficiency is 99.4% after 100 cycles. The reasons are that the MXene materials have an accordion layered structure so that the contact sites of lithium iron phosphate increases, and MXene materials have more functional group structure than graphene materials, which contributes to the electrochemical performance improvement of LFP. However, if excess MXene is added, agglomeration will occur which will affect its electrochemical performance.