Additives for improved battery performance, improved additive-containing membranes, improved battery separators, improved batteries, and related methods

• Main Authors: White, Eric Robert, Adams, Changqing Wang, Lu, Yao, Chemelewski, Katharine, Stepp, Brian R, Xiao, Kang Karen, Okada, Masaaki, Reinartz, Stefan
• Format: Patent
• Language: English
• Published: 05.03.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

Described herein, are battery separators, comprising the following: a microporous polymeric film; and an optional coating layer on at least one side of the microporous polymeric film, wherein at least one of the microporous polymeric film and the optional coating comprises an additive. The additive is selected from the group consisting of a lubricating agent, a plasticizing agent, a nucleating agent, a shrinkage reducing agent, a surfactant, an SEI improving agent, a cathode protection agent, a flame retardant additive, LiPF6 salt stabilizer, an overcharge protector, an aluminum corrosion inhibitor, a lithium deposition agent or improver, or a solvation enhancer, an aluminum corrosion inhibitor, a wetting agent, and a viscosity improver. Also, described herein are batteries, including lithium-ion batteries, comprising one or more of the described separators. Methods for making the battery separators are also described.