Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Reexamination Certificate
2006-07-18
2006-07-18
Ryan, Patrick Joseph (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Electrode
C429S224000, C429S221000, C429S223000, C429S231300, C429S231950, C423S594200, C423S594400, C423S596000, C423S599000
Reexamination Certificate
active
07078127
ABSTRACT:
A method for producing a positive electrode material adapted to the Li-ion secondary batteries is disclosed. The produced material has the following formula (I),in-line-formulae description="In-line Formulae" end="lead"?Li1+xMn2−yMyO4 (I)in-line-formulae description="In-line Formulae" end="tail"?wherein M is Mg, Al, Cr, Fe, Co, or Ni; 0≦x≦0.4, and 0≦y≦0.2. The method is achieved by co-precipitating a gel salts with an organic acid. First, salts of Li, Mn and M are mixed with at least a solvent to form an initial solution. The mole ratio of Li, Mn and M ions in their respective salts is (1+x):(2−y):y. Next, at least a chelate is added into the initial solution to form a suspension, which is then filtered to obtain a co-precipitate. Finally, the co-precipitate is calcined and heated to obtain the final product.
REFERENCES:
patent: 6110442 (2000-08-01), Xia et al.
patent: 6306542 (2001-10-01), Nakano et al.
patent: 6692665 (2004-02-01), Shima et al.
Chen Yi-Shiuan
Lin Yung-Jen
Liu Wen-Jen
Wu She-Huang
Yang Mu-Rong
Martin Angela J.
Ryan Patrick Joseph
Tatung Co. Ltd.
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