2013 R&D 100 Winner
LBL Conducting Polymer BinderImprovements to lithium-ion batteries have been difficult in part because of the relative simplicity of the battery. However, the glue-like binders used to hold electrode materials in place have been identified as a potential area for improvements. Typically, these anodic materials have been based on graphite. At Lawrence Berkeley National Laboratory, a Conducting Polymer Binder has been developed based on silicon and offers four features of improvement over previous technologies: strength, elasticity, porosity and conductivity. An approach involving polymer chemistry, computational physics and soft x-ray absorption spectroscopy identified the optimal polyfluorene polymer binder, which, when combined with silicon, achieves a specific capacity of 1,400 mAh/g, far higher than graphite-based anodes.

Polymer binder

Lawrence Berkeley National Laboratory

Development Team

The Conducting Polymer Binder Development Team from Lawrence Berkeley National Laboratory
Gao Liu, Principal Developer
Vincent Battaglia
Sang-Jae Park
Lin-Wang Wang
Mingyan Wu
Wanli Yang
Shindi Xun