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:
Sep. 16, 2014
Filed:
Jan. 14, 2011
Christopher S. Johnson, Naperville, IL (US);
Sun-ho Kang, Naperville, IL (US);
Donghan Kim, Darien, IL (US);
Mahalingam Balasubramanian, Naperville, IL (US);
Christopher S. Johnson, Naperville, IL (US);
Sun-Ho Kang, Naperville, IL (US);
Donghan Kim, Darien, IL (US);
Mahalingam Balasubramanian, Naperville, IL (US);
Uchicago Argonne, LLC, Chicago, IL (US);
Abstract
The present invention provides an electrode material suitable for use as a cathode in a sodium electrochemical cell or battery, the electrode comprising a layered material of formula NaLiNiMnMO, wherein M comprises one or more metal cation, 0.24≦c/b≦0.5, 0<d/b≦0.23, 0≦e/b≦0.45, 0≦f/b≦0.45, 0≦z/b≦0.45, the combined average oxidation state of the metal components (i.e., NaLiNiMnM) is in the range of about 3.9 to 5.2, and b is equal to (c+d+Ve+Xf+Yz)/2, wherein V is the average oxidation state of the Ni, X is the average oxidation state of the Mn, and Y is the average oxidation state of the M in the material. The combined positive charge of the metallic elements is balanced by the combined negative charge of the oxygen anions, the Na is predominately present in a sodium layer, and the Mn, Ni, and M are predominately present in a transition metal layer.