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Surface Modification Agents Increase Safety, Security of Lithium-Ion Batteries

New Process to Modify the Surface of the Active Material Used in Lithium-Ion Batteries

Argonne National Laboratory

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<em>Surface Modification Schematic </em>
Surface Modification Schematic

Technology Marketing Summary

Argonne National Laboratory has developed a process to modify the surface of the active material used in lithium-ion batteries. The modification agent can be a silane, an organometallic compound, or a mixture of two or more of such compounds. Both negative and positive electrodes for lithium-ion batteries can be made from the surface-modified active materials. Surface modification can be accomplished by either (1) adding the agent to a non-aqueous electrolyte used in constructing a battery or (2) treating the materials in a gas phase or in a solution.

Description

Led by inventors Zonghai Chen, Khalil Amine, and Ilias Belharouak, a team of Argonne researchers has formulated a process that enhances the safety and security of lithium-ion batteries. The process, which modifies the surface of the active material used in the battery, prevents a catalytic reaction that generates hydrogen gas, which can lead to potential explosions and substantial power fade.

 The surface modification agent can take several forms: it can consist of a silane, an organometallic compound, or a mixture of two or more such compounds. Once modified, the active materials can be used in the manufacture of negative or positive electrodes.

 In addition, the modification process can take several forms. For example, an electrode’s surface may be modified by adding the agent to a non-aqueous electrolyte used during the battery’s manufacturing process. The modification agent can be applied to an electrode or active material in solution or during the gaseous phase. As another option, slurries of the active agent may be prepared and the surface modification agent added, with the slurry used to cast an electrode that is then dried.

Benefits
  • Increased safety and life of a lithium-ion battery 
  • Includes methods and molecules as additives that enable electrode modification
Applications and Industries

Coatings for electrodes used in batteries for

  • Electric and plug-in hybrid electric vehicles
  • Portable electronic devices
  • Medical devices
  • Space, aeronautical, and defense-related devices
Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Date
Application 20090286157
Application
20090286157
Surface modification agents for lithium batteries
An active material for an electrochemical device may have a surface modification agent that is a silane, organometallic compound, or a mixture of two or more of such compounds. Both negative and positive electrodes may be prepared from the surface modified active materials. The surface of an electrode may be modified by adding the surface modification agent to a non-aqueous electrolyte used in constructing a battery. An electrode or active material may be modified with a surface modification agent in either the gas phase or in solution. Slurries of the active agent may be prepared and the surface modification agent added, the slurry then be used to cast an electrode that is then dried.
Argonne National Laboratory 05/13/2009
Filed
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
ANL-IN-08-026PrototypeAvailable01/29/201301/29/2013

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To: Elizabeth Jordan<partners@anl.gov>