Hrl Laboratories, LLC

UChicago Argonne, LLC

Air Products and Chemicals, Inc.

Liu, Jun

Amine, Khalil

Jun Liu

Khalil Amine

Adam Franklin Gross

Ping Liu

Jocelyn Hicks-Garner

Donald R Vissers

Wenquan Lu

Brian Keith Peterson

Ilias Belharouak

Krishnakumar Jambunathan

Gennady Dantsin

This invention provides lithium-based batteries that include one or more inorganic barrier layers disposed between the anode and the cathode. The inorganic barrier layer is a lithium-ion conductor and is non-permeable to lithium-containing compounds, such as lithium polysulfides or lithium dendrites. The inorganic barrier layer may be in direct contact with the anode or cathode, or electrically isolated from the anode and cathode. The principles disclosed herein solve the problem of maintaining electrical isolation of the anode and cathode, while providing efficient lithium-ion conduction without crossover of other lithium species that would otherwise limit the power performance of the battery.

Fabrication methods to produce lithium battery structures with composite layers

Lithium battery structures employing composite layers, and fabrication methods to produce composite layers

The present invention relates to non-aqueous electrolytes having electrode stabilizing additives, stabilized electrodes, and electrochemical devices containing the same. Thus the present invention provides electrolytes containing an alkali metal salt, a polar aprotic solvent, and an electrode stabilizing additive. In certain electrolytes, the alkali metal salt is a bis(chelato)borate and the additives include substituted or unsubstituted linear, branched or cyclic hydrocarbons comprising at least one oxygen atom and at least one aryl, alkenyl or alkynyl group. In other electrolytes, the additives include a substituted aryl compound or a substituted or unsubstituted heteroaryl compound wherein the additive comprises at least one oxygen atom. There are also provided methods of making the electrolytes and batteries employing the electrolytes. The invention also provides for electrode materials. Cathodes of the present invention may be further stabilized by surface coating the particles of the spinel or olivine with a material that can neutralize acid or otherwise lessen or prevent leaching of the manganese or iron ions. In some embodiments the coating is polymeric and in other embodiments the coating is a metal oxide such as ZrO, TiO, ZnO, WO, AlO, MgO, SiO, SnOAlPO, Al(OH), a mixture of any two or more thereof.

Long life lithium batteries with stabilized electrodes

A material comprising a lithium titanate comprising a plurality of primary particles and secondary particles, wherein the average primary particle size is about 1 nm to about 500 nm and the average secondary particle size is about 1 &#x3bc;m to about 4 &#x3bc;m. In some embodiments the lithium titanate is carbon-coated. Also provided are methods of preparing lithium titanates, and devices using such materials.

Electrode materials and lithium battery systems

The invention relates to an improvement in a cell which is normally susceptible to damage from overcharging comprised of a negative electrode, a positive electrode, and an electrolyte comprised of an overcharge protection salt carried in a carrier or solvent. Representative overcharge protection salts are embraced by the formula:MQwhere M is an electrochemically stable cation selected from the group consisting of alkali metal, alkaline earth metal, tetraalkylammonium, or imidazolium groups, and Q is a borate or heteroborate cluster and a is the integer 1 or 2.

Overcharge protection for electrochemical cells

The present invention relates to non-aqueous electrolytes having electrode stabilizing additives, stabilized electrodes, and electrochemical devices containing the same. Thus the present invention provides electrolytes containing an alkali metal salt, a polar aprotic solvent, and an electrode stabilizing additive. In some embodiments the additives include a substituted or unsubstituted cyclic or spirocyclic hydrocarbon containing at least one oxygen atom and at least one alkenyl or alkynyl group. When used in electrochemical devices with, e.g., lithium manganese oxide spinel electrodes or olivine or carbon-coated olivine electrodes, the new electrolytes provide batteries with improved calendar and cycle life.

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Naperville, IL, United States of America

Jun Liu