How to avoid a capacity decay by selecting a right binder polymer for silicon-based batteries

Silicon is a promising anode material for rechargeable Li-ion battery (LIB) due to its high energy density and relatively low operating voltage. However, silicon based electrodes suffer from rapid capacity degradation during electrochemical cycling. The capacity decay is predominantly caused by

(i) cracking due to large volume variations during lithium insertion/extraction and

(ii) surface degradation due to excessive solid electrolyte interface (SEI) formation.

A robust binder polymer can help provides strong mechanical stability during the charge/discharge process to suppress the swelling of electrodes.

BATTBOND is a reputable brand for water-based polyacrylate or Poly(AA-co-AN) binders. There are two models designedly, especially for Silicon-based anode-BATTBOND 290S3 and BATTBOND 290S.