New hybrid binder for lithium EV batteries retains 86% capacity after 200+ cycles

Researchers at Sungkyunkwan University and Seoul National University developed a dual-acting hybrid polymer binder for thick lithium-ion battery electrodes.

The binder combines spandex and poly(acrylic acid), nearly doubling adhesion compared with PVDF in commercial pouch-cell tests.

It retained 86.8% of capacity after more than 200 cycles, indicating stronger durability and cycle life.

The material is compatible with standard wet manufacturing, which could help EV battery makers use existing production lines.

If scaled, the technology could support higher-capacity batteries, longer driving range, and lower manufacturing barriers.