Positive pole piece, battery and preparation method of positive pole piece

The invention discloses a positive pole piece in the technical field of batteries. The positive pole piece comprises nano titanium carbide. The preparation method comprises the following steps: step 1, preparing carbon nanotubes, dry positive electrode powder, polyvinylidene fluoride powder and nano titanium carbide powder in parts by weight; and 2, uniformly stirring polyvinylidene fluoride powder and N-methyl pyrrolidone in a certain proportion to form a glue solution, then adding the positive electrode powder, the nano titanium carbide powder and the carbon nanotubes into the glue solution, uniformly stirring, and coating an aluminum foil with the mixture to obtain the positive electrode plate. The invention also provides a battery based on the positive pole piece. The nano titanium carbide powder is added in the positive electrode mixing stage, so that a good heat-conducting and electric-conducting network is formed in the positive electrode material by utilizing the characteristics of high heat conductiv