PI (Polyimide) is an aromatic heterocyclic polymer that offers a combination of thermal, mechanical, and chemical stability that traditional binders like PVDF simply cannot match. Polyimide binders are famous for their exceptional tensile strength (exceeding 400 MPa) and high modulus. PI forms a rigid yet elastic matrix that effectively encapsulates silicon particles, maintaining electrical contact and preventing the electrode from "pulverizing". PI has a much higher affinity for metal current collectors (Copper/Aluminum) than PVDF, significantly reducing the risk of delamination. Moreover, PI can operate continuously from -200°C to 300°C and withstand short-term spikes up to 400°C.

Part Number	CBEBPI (C-BEB-PI)
CAS	62929-02-6
Chemical Formula/Structure
Appearance	Light yellow powder (If customer need the aqueous PI dispersion, we can provide it upon request)
Package Size	50 g/bottle

Notes: Please try to store the PI powders in a dry place (glovebox is the best option). 

References: 

1. J. S. Kim, et al. Effect of polyimide binder on electrochemical characteristics of surface-modified silicon anode for lithium ion batteries, J. Power Sources, 2013, 244, 521-526.
2. G. Qian, et al. Polyimide Binder: A Facile Way to Improve Safety of Lithium Ion Batteries, Electrochimica Acta, 2016, 187, 113-118.