公开(公告)号：US20180212270A1

公开(公告)日：2018-07-26

申请号：US15747778

申请日：2016-07-21

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Larry J. Krause ,  Lowell D. Jensen

IPC: H01M10/058 ,  H01M10/0525 ,  H01M4/1393 ,  H01M4/36 ,  H01M4/38 ,  H01M4/587 ,  H01M12/08

CPC classification number: H01M10/058 ,  H01M4/13 ,  H01M4/1393 ,  H01M4/366 ,  H01M4/382 ,  H01M4/587 ,  H01M10/052 ,  H01M10/0525 ,  H01M12/08 ,  Y02E60/128

Abstract: Lithium metal electrodes including a graphite-modified surface and the methods for making the electrodes are provided. Electrochemical device components include a lithium metal electrode having a first major surface, and a surface layer disposed on the first major surface of the lithium metal electrode. The surface layer has a composition including a compound of graphite and lithium. The surface layer is electrically conductive and lithium-ion conductive, and the surface layer is chemically compatible with the lithium metal on a first side in contact with the lithium metal electrode, and chemically compatible with electrolyte environments on a second side of the surface layer.

公开(公告)号：US20190190060A1

公开(公告)日：2019-06-20

申请号：US16221654

申请日：2018-12-17

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Vincent J.L. Chevrier ,  Larry J. Krause ,  Lowell D. Jensen

IPC: H01M10/0525 ,  H01M10/058 ,  H01M4/131 ,  H01M4/134 ,  H01M4/38 ,  H01M4/525

CPC classification number: H01M10/0525 ,  H01M4/131 ,  H01M4/134 ,  H01M4/386 ,  H01M4/525 ,  H01M10/058 ,  H01M2004/021

Abstract: An electrochemical cell includes a negative electrode that includes an active material including silicon. The electrochemical cell further includes a positive electrode that includes a first lithium metal oxide and a second lithium metal oxide. The first lithium metal oxide includes a material having (i) a nickel content of less than 30 mole %, based on the total moles of non-lithium metals in the first lithium metal oxide; and (ii) a D50 of greater than 2 micrometers. The second lithium metal oxide includes a material having (i) a nickel content of greater than 30 mole %, based on the total moles of non-lithium metals in the first lithium metal oxide; and (ii) a D50 of less than 2 micrometers. The second lithium metal oxide is provided in the positive electrode composition in an amount of less than 20 wt. %, based on the total weight of the first lithium metal oxide and second lithium metal oxide in the positive electrode composition.