The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 19, 2018
Filed:
Nov. 11, 2011
Harald Kren, Graz, AT;
Stefan Koller, Graz, AT;
Andrea Droisner, Bartholomä, AT;
VARTA Microbattery GmbH, , DE;
Abstract
A formed, secondary electrochemical cell includes at least one positive electrode containing a metal compound capable of reversibly incorporating and releasing lithium in the form of ions, at least one negative electrode containing a carbon compound capable of reversibly incorporating or releasing lithium in the form of ions, and/or a metal and/or semi-metal which can be alloyed with lithium, an electrolyte via which lithium ions can migrate between the at least one positive electrode and the at least one negative electrode, and mobile lithium available for incorporation or releasing processes in the electrodes, wherein capacity of the at least one negative electrode for taking up lithium is higher than that of the at least one positive electrode, the at least one negative electrode has a higher capacity than required for taking up the entire mobile lithium contained in the cell, and the mobile lithium is contained in the cell in an amount which exceeds the capacity of the at least one positive electrode for taking up lithium.