Jun Liu

7507503, Mar 24, 2009

Dec 8, 2005

11/297120

Khalil Amine - Downers Grove IL, US
Jun Liu - Naperville IL, US
Donald R. Vissers - Naperville IL, US
Wenquan Lu - Darien IL, US

U Chicago Argonne LLC - Chicago IL

H01M 6/16

429329, 252 622

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.

7785740, Aug 31, 2010

Apr 1, 2005

11/097810

Khalil Amine - Downers Grove IL, US
Jun Liu - Naperville IL, US
Krishnakumar Jambunathan - Macungie PA, US
Brian Keith Peterson - Fogelsville PA, US
Gennady Dantsin - Allentown PA, US

Air Products and Chemicals, Inc. - Allentown PA

H01M 10/056

429199, 429200

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.

7968231, Jun 28, 2011

May 31, 2006

11/444219

Khalil Amine - Downers Grove IL, US
Ilias Belharouak - Westmont IL, US
Jun Liu - Naperville IL, US

U Chicago Argonne, LLC - Chicago IL

H01M 4/131
H01M 4/485
C01G 23/04

4292311, 4292315, 423598

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 μm to about 4 μm. In some embodiments the lithium titanate is carbon-coated. Also provided are methods of preparing lithium titanates, and devices using such materials.

20060147809, Jul 6, 2006

Jan 24, 2006

11/338902

Khalil Amine - Downers Grove IL, US
Jun Liu - Naperville IL, US
Donald Vissers - Naperville IL, US
Wenquan Lu - Darien IL, US

H01M 10/40

429326000, 429330000

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.