PVDF powder is showing an upward trend in the coating of lithium battery separators. However, when preparing the coating slurry for lithium battery coatings, if the dispersion is not good, it is easy to encounter problems such as agglomeration, hardening, and particle sensation. At the same time, when coating on the lithium battery separator, particle sensation may occur, and the powder may drop when touched by hand. If applied to lithium batteries, it is easy to cause the lithium battery to jump, We need to find specific dispersants to solve the problem of PVDF slurry dispersibility. Of course, all products still need to be tested to determine whether they are usable, and practice is the standard for testing whether products are feasible. So the use of sand mills is particularly widespread, as they can ensure the high purity, stable performance, and narrow particle size distribution of PVDF slurry. It can better promote PVDF slurry to the user group.