1results about How to "Aid in diffusion" patented technology

The application relates to the technical field of lithium ion batteries, and specifically provides a preparation method of lithium iron phosphate, lithium iron phosphate, a positive electrode sheet and a lithium ion battery. The preparation method of the lithium iron phosphate provided by the application comprises the following steps: providing Ti-MOF / polymer composite nanofibers; mixing the Ti-MOF / polymer composite nanofibers with a lithium source and a phosphorus-iron source to obtain a precursor mixture; and sintering the precursor mixture under an inert atmosphere. The method provided by the application not only avoids a large amount of loss and dust pollution caused by directly using nanometer powder, but also retains the characteristics of a large specific surface area and high activity of the nanofiber, which is helpful to diffusion into the crystal interior at a low sintering temperature and improvement of the ion conductivity of LFP; the carbonized fiber skeleton after calcination can construct a conductive network, further improving the electronic conductivity of LFP, and being helpful to reduction of the use of a conductive agent in the positive electrode sheet.