Coatings for lithium titanate to suppress gas generation in lithium-ion batteries and methods for making and use thereof

摘要

An electroactive material for use in an electrochemical cell, like a lithium-ion battery, is provided. The electroactive material comprises lithium titanate oxide (LTO) and has a surface coating with a thickness of less than or equal to about 30 nm that suppresses formation of gases within the electrochemical cell. Methods for making such materials and using such materials to suppress gas formation in electrochemical cells are likewise provided.

主权项

1. An electroactive material for an electrochemical cell comprising:
Li(4+x)Ti5O12, where 0≦x≦3 (LTO); anda surface coating formed thereon via a non-aqueous atomic layer deposition (ALD) process, wherein the surface coating is selected from the group consisting of: a fluoride-based surface coating, a carbide-based surface coating, and a nitride-based surface coating and has a thickness of less than or equal to about 30 nm that suppresses formation of gases within the electrochemical cell.