Ionic conducting polymer encapsulated graphite as the anode material for lithium ion batteries

Abstract

Abstract A novel surface modification approach involving the application of radiation technology to the development of graphite anode of lithium ion batteries. Ionic conductive poly(stylene sulfonic acid) lithium salt (PSSALi) was microencapsulated on the surface of graphite particles by means of radiation‐initiated polymerization. Results showed that the cointercalation of solvated Li + in a propylene carbonate (PC) based electrolyte was depressed successfully and the initial coulombic efficiency was enhanced after encapsulation. The high stability of the surface structure of encapsulated graphite during the initial intercalation process was observed by in situ Raman spectroscopy. Copyright © 2003 John Wiley & Sons, Ltd.