Spherical Metal Carbonates and Lithium Metal Oxides for Lithium Rechargeable Batteries

a lithium metal oxide and lithium metal oxide technology, applied in the direction of cell components, electrochemical generators, nickel compounds, etc., can solve the problems of rather high impedance for high-power applications and small capacity for high-energy applications, and achieve the effects of improving the stability of the layered oxide structure during electrochemical cycling, improving the packing density and thermal safety, and improving the impedance characteristics

US20090087746A1Inactive Publication Date: 2009-04-02UCHICAGO ARGONNE LLC
6 Cites 22 Cited by

Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Publication Date
2009-04-02
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

A number of materials with the composition Li1+xNiαMnβCoγM′δO2−zFz (M′=Mg, Zn, Al, Ga, B, Zr, Ti) for use with rechargeable batteries, wherein x is between about 0 and 0.3, α is between about 0.2 and 0.6, β is between about 0.2 and 0.6, γ is between about 0 and 0.3, δ is between about 0 and 0.15, and z is between about 0 and 0.2. Adding the above metal and fluorine dopants affects capacity, impedance, and stability of the layered oxide structure during electrochemical cycling. Another aspect of the invention includes materials with the composition Li1+xNiαCoβMnγM′δOyFz (M′=Mg, Zn, Al, Ga, B, Zr, Ti), where the x is between 0 and 0.2, the α between 0 and 1, the β between 0 and 1, the γ between 0 and 2, the δ between about 0 and about 0.2, the y is between 2 and 4, and the z is between 0 and 0.5.
Need to check novelty before this filing date? Find Prior Art

Description

CROSS-REFERENCE TO RELATED PATENT APPLICATIONS

[0001] This application is a divisional application and claims priority to U.S. patent application Ser. No. 10 / 903,514, titled “Method and Apparatus for Preparation of Spherical Metal Carbonates and Lithium Metal Oxides for Lithium Metal Oxides for Lithium Rechargeable Batteries”, filed on Jul. 30, 2004, and incorporated herein by reference in its entirety, which is a continuation in part of and claims priority to U.S. patent application Ser. No. 10 / 699,484, titled “Layered Cathode materials for Lithium Ion Rechargeable Batteries”, filed on Oct. 31, 2003, and incorporated herein by reference in its entirety, which claims priority to U.S. Provisional Patent Application No. 60 / 423,347, filed Nov. 1, 2002, also incorporated herein by reference in its entirety.STATEMENT OF GOVERNMENT INTEREST

[0002] This invention was made with government support under Contract No. W-31-109-ENG-38 awarded to the Department of Energy. The Government has certain ...

Examples

Embodiment Construction

[0037]The present invention presents layered lithium nickel manganese oxide cathode materials for lithium secondary batteries such as: (1) cathode materials doped with fluorine on oxygen sites to reduce impedance and to improve cycling stability at high temperature as well as at room temperature; (2) cathode materials doped with various metal ions on transition metal site to stabilize layered structure, suppress cation mixing and, consequently, improve electrochemical properties; lithium, cobalt, magnesium, zinc, aluminum, gallium, boron, zirconium, and titanium ions were chosen for the latter purposes; and (3) cathode materials surface-coated to improve cycling / power performance and thermal safety, wherein the coating element of the coating material source is at least one element selected from the group consisting of Al, Bi, Ga, Ge, In, Mg, Pb, Si, Sn, Ti, TI, Zn, Zr. Another aspect of the present invention relates to a method of preparing: 1) spherical mixed nickel-cobalt-manganes...