화학공학소재연구정보센터
Journal of the Electrochemical Society, Vol.161, No.6, A955-A960, 2014
Polyamide-Imide Binder with Higher Adhesive Property and Thermal Stability as Positive Electrode of 4V-Class Lithium-Ion Batteries
Polyamide-imide (PAT) was used as the advanced binder for the 4V-class LiNi1/13Co1/3Mn1/3O2 (LNCMO) electrode. The PAT binder showed a higher adhesive property and thermal stability than the polyvinylidene difluoride (PVdF) ones. The cycling stability at 60 degrees C for the LNCMO electrodes was improved by using the PAT binder. The capacity retention ratio after 500 cycles at the 5C-rate was 23% for the electrode using the PVdF binder, whereas that increased to 80% for the electrode using the PAT one. A part of the LNCMO particle surface was coated by a thin layer of the PAT binder based on SEM observations, and EDS and XPS analyzes. The PAT layer was effective for suppressing the electrolyte decomposition on the particle surface and decreasing the generated total heat, thus showing the high thermal stability of the LNCMO electrode. (C) 2014 The Electrochemical Society.