Surface modification of battery materials and method for making a battery

Patent metadata

Field	Value
Publication number	US-8999009-B2
Application number	US-201313788950-A
Country	US
Kind code	B2
Filing date	Mar 7, 2013
Priority date	Mar 7, 2012
Publication date	Apr 7, 2015
Grant date	Apr 7, 2015

Abstract

Provided herein are methods for processing electrochemically active materials for use in rechargeable batteries. The methods may also be practiced on electrodes and batteries containing such electrochemically active materials. In a typical embodiment, a method of chemically modifying the surface of an electrochemically active component of a battery is provided, the method including receiving the electrochemically active material and exposing the electrochemically active material to a gaseous reactant under conditions that chemically modify surfaces of the electrochemically active material that are accessible to the gaseous reactant, and thereby produce a modified electrochemically active material having improved properties for use in the battery.

First claim

What is claimed is:

1. A method of chemically modifying a surface of an electrochemically active component of a lithium ion battery, the method comprising:
(a) receiving the electrochemically active material for the lithium ion battery;
(b) fabricating a stack or a jelly roll containing the electrochemically active material after electrode drying; and
(c) following fabricating the stack or the jelly roll, exposing the electrochemically active material to a gaseous reactant und…

Assignees

• A123 Systems Llc

Inventors

• Tikhonov Konstantin
• Lin Tzu-Yuan

Classifications

• C23C16/00

  Chemistry & Metallurgy · mapped topic

• H01M4/049 Primary

  Electricity · mapped topic

• Y02E60/10

  Cross-Sectional Technologies · mapped topic

• H01M4/485

  Electricity · mapped topic

• H01M4/139

  Electricity · mapped topic