Comparative Study of the Adhesion Properties of Ceramic Composite Separators Using a Surface and Interfacial Cutting Analysis System for Lithium-Ion Batteries.

ABSTRACT: Because of the constantly increasing demand for highly safe lithium-ion batteries (LIBs), interest in the development of ceramic composite separators (CCSs) is growing rapidly. Here, an in-depth study of the adhesion properties of the Al₂O₃ ceramic composite coating layer of CCSs is conducted using a peel test and a surface and interfacial cutting analysis system (SAICAS). Contrary to the 90 and 180° peel tests, which resulted in different adhesion strengths even for the same CCS sample, the SAICAS is able to measure the adhesion properties uniformly as a function of depth from the surface of the coating layer. The adhesion strengths measured at the midlayer (F _mid) and interface (F _inter, interlayer between the separator and the ceramic coating layer) are compared for various types of CCS samples with different amounts of polymeric binder, and it is found that F _inter is higher than F _mid for all CCSs. Compared with F _mid, F _inter is significantly affected by storage in the liquid electrolyte (under wet condition).

SUBMITTER: Jeon H 

PROVIDER: S-EPMC6641004 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature