Jane Y Rempel

US Patent:

20200277199, Sep 3, 2020

Filed:

May 19, 2020

Appl. No.:

16/878460

Inventors:

- Lexington MA, US
David Ofer - Lexington MA, US
Suresh Sriramulu - Lexington MA, US
Kenan Sahin - Lexington MA, US
Jane Rempel - Arlington MA, US

International Classification:

C01G 53/00
H01M 4/525

Abstract:

Provided are electrochemically active secondary particles that provide excellent capacity and improved cycle life. The particles are characterized by selectively enriched grain boundaries where the grain boundaries are enriched with Al and Co. The enrichment with Al reduces impedance generation during cycling thereby improving capacity and cycle life. Also provided are methods of forming electrochemically active materials, as well as electrodes and electrochemical cells employing the secondary particles.

US Patent:

20200231463, Jul 23, 2020

Filed:

Oct 23, 2019

Appl. No.:

16/661410

Inventors:

- Lexington MA, US
David Ofer - Needham MA, US
Suresh Sriramulu - Arlington MA, US
Kenan Sahin - Lexington MA, US
Jane Rempel - Arlington MA, US

International Classification:

C01G 53/00
H01M 4/525

Abstract:

Provided are electrochemically active secondary particles that provide excellent capacity and improved cycle life. The particles are characterized by selectively enriched grain boundaries where the grain boundaries are enriched with Al and Co. The enrichment with Al reduces impedance generation during cycling thereby improving capacity and cycle life. Also provided are methods of forming electrochemically active materials, as well as electrodes and electrochemical cells employing the secondary particles.

US Patent:

20190036118, Jan 31, 2019

Filed:

Feb 9, 2017

Appl. No.:

16/073874

Inventors:

- Lexington MA, US
Jane Rempel - Arlington MA, US
Suresh Sriramulu - Arlington MA, US

International Classification:

H01M 4/505
H01M 4/525
H01M 10/0525
H01M 4/1391

Abstract:

Provided are compositions, systems, and methods of making and using pre-lithiated cathodes for use in lithium ion secondary cells as the means of supplying extra lithium to the cell. The chemically or electrochemically pre-lithiated cathodes include cathode active material that is pre-lithiated prior to assembly into an electrochemical cell. The process of producing pre-lithiated cathodes includes contacting a cathode active material to an electrolyte, the electrolyte further contacting a counter electrode lithium source and applying an electric potential or current to the cathode active material and the lithium source thereby pre-lithiating the cathode active material with lithium. An electrochemical cell is also provided including the pre-lithiated cathode, an anode, a separator and an electrolyte.