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:
Jul. 18, 2006
Filed:
Jun. 11, 2003
She-huang Wu, Taipei, TW;
Yung-jen Lin, Taipei, TW;
Mu-rong Yang, Taipei, TW;
Wen-jen Liu, Taipei, TW;
Yi-shiuan Chen, Taipei, TW;
She-Huang Wu, Taipei, TW;
Yung-Jen Lin, Taipei, TW;
Mu-Rong Yang, Taipei, TW;
Wen-Jen Liu, Taipei, TW;
Yi-Shiuan Chen, Taipei, TW;
Tatung Co., Ltd., Taipei, TW;
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),LiMnMO  (I)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.