Camx Power LLC

Kenan Sahin

David Ofer

Suresh Sriramulu

Adrian W Pullen

Jane Rempel

Jennifer Anne Nelson

Daniel Kaplan

Rahul Malik

Kenneth Rosina

Sharon Dalton-Castor

Thomas Carney

Provided are electrochemically active composite materials that include a first particle comprising a first composition optionally of LiMO(Formula I) where −0.3≤a≤0.3 and −0.3≤b≤1.3 and where M optionally includes 30 at % to 80 at % Mn and 30 at % to 75 at % Ni, the first particle formed of a polycrystalline morphology having a plurality of crystallites and a grain boundary between adjacent crystallites; and a second particle comprising a second composition optionally of LiM'O(Formula II) where −0.1≤c≤0.3 and −0.2≤d≤0.2, wherein M′ comprises Mn at about 75 at % to about 100 at %, wherein said second composition or a portion thereof with a spinel structure and in the form of a three dimensional polyhedron; and wherein said second particle is within, on or about a surface of said first particle.

Multiple morphology composite cathode materials providing high energy and long cycle life and cells employing the same

Provided are electrochemically active composite materials that include a first composition optionally of LiMO(Formula I) where −0.3≤a≤0.3 and −0.3≤b≤1.3 and where M optionally includes 30 at % to 80 at % Mn and 30 at % to 75 at % Ni, the first composition formed of a polycrystalline morphology having a plurality of crystallites and a grain boundary between adjacent crystallites, the grain boundary including one or more enrichment elements, said one or more enrichment elements present at a higher atomic percentage than in an adjacent crystallite, wherein the one or more enrichment elements is selected from the group consisting of Co, Al, or both Co and Al; and a second composition optionally of LiM'O(Formula II) where −0.1≤c≤0.3 and −0.2≤d≤0.2, wherein M′ comprises Mn at about 75 at % to about 100 at %, wherein the second composition or a portion thereof optionally has a polyhedral morphology; the second composition within, on or about a surface of, or intermixed with said first composition.

Provided are electrochemical secondary cells that exhibit excellent abuse tolerance, deep discharge and overcharge conditions including at extreme temperatures and remain robust and possess excellent performance. Cells as provided herein include: a cathode a polycrystalline cathode electrochemically active material including the formula LiMO, wherein −0.9≤x≤0.3, −0.3≤y≤0.3, and wherein M includes Ni at 80 atomic percent or higher relative to total M, an anode including an anode electrochemically active material defined by an electrochemical redox potential of 400 mV or greater vs Li/Li.

High power, extended temperature range-capable, highly abuse overcharge and discharge tolerant rechargeable battery cell and pack

Provided are electrochemically active particles suitable for use as an active material in a cathode of a lithium ion electrochemical cell that include: a plurality of crystallites comprising a first composition comprising lithium, nickel, and oxygen; and a grain boundary between adjacent crystallites of the plurality of crystallites and comprising a second composition comprising lithium, nickel, and oxygen; wherein the grain boundary has a higher electrochemical affinity for lithium than the crystallites. The higher electrochemical affinity for Li leads to increased Li retention in the grain boundaries during or at charge relative to the bulk crystallites and stabilizes the structure of the grain boundaries and crystallites for improved cycling stability with no appreciable loss in capacity.

Stable cathode materials

Provided are electrochemical secondary cells that exhibit excellent abuse tolerance, deep discharge and overcharge conditions including at extreme temperatures and remain robust and possess excellent performance. Cells as provided herein include: a cathode a polycrystalline cathode electrochemically active material including the formula LiMO, wherein &#x2212;0.9&#x2264;x&#x2264;0.3, &#x2212;0.3&#x2264;y&#x2264;0.3, and wherein M includes Ni at 80 atomic percent or higher relative to total M, the cathode electrochemically active material comprising a non-uniform distribution of Co; an anode including an anode electrochemically active material of the formula LiTiOwherein &#x2212;0.3&#x2264;a&#x2264;3.3, &#x2212;0.3&#x2264;b&#x2264;0.3; and wherein the anode and the cathode each independently include a current collector substrate comprising aluminium.

Provided are electrochemical secondary cells that exhibit excellent abuse tolerance, deep discharge and overcharge conditions including at extreme temperatures and remain robust and possess excellent performance. Cells as provided herein include: a cathode a polycrystalline cathode electrochemically active material including the formula LiMO, wherein &#x2212;0.9&#x2264;x&#x2264;0.3, &#x2212;0.3&#x2264;y&#x2264;0.3, and wherein M includes Ni at 80 atomic percent or higher relative to total M, an anode including an anode electrochemically active material defined by an electrochemical redox potential of 400 mV or greater vs Li/Li.

Provided are electrochemical cells that include as a cathode active material within the cathode of the cell secondary particles that provide excellent capacity and improved cycle life. The particles are characterized by grain boundaries between adjacent crystallites of the plurality of crystallites and comprising a second composition having a layered &#x3b1;-NaFeO-type structure, a cubic structure, a spinel structure, or a combination thereof, wherein the electrochemically active cathode active material has an initial discharge capacity of 180 mAh/g or greater; and wherein the electrochemical cell has an impedance growth at 4.2V less than 50% for greater than 100 cycles at 45&#xb0; C.

Polycrystalline metal oxides with enriched grain boundaries

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.

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 Al. 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.

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Lexington, MA, United States of America

Kenan Sahin