continued from part 1 - Controller General of Patents, Designs, and ...

(12) PATENT APPLICATION PUBLICATION (21) Application No.6656/DELNP/2008 A
(19) INDIA
(22) Date of filing of Application :31/07/2008 (43) Publication Date : 24/10/2008
(54) Title of the invention : COATED METAL OXIDE PARTICLES WITH LOW DISSOLUTION RATE, METHODS FOR
PREPARING SAME AND USE THEREOF IN ELECTROCHEMICAL SYSTEMS
(51) International classification :H01M 4/02 (71)Name of Applicant :
(31) Priority Document No :2,534,243
1)HYDRO-QUEBEC
(32) Priority Date :25/01/2006
Address of Applicant :75, BOULEVARD RENE-LEVESQUE
(33) Name of priority country :Canada
OUEST, MONTREAL, QUEBEC H2Z 1A4 (CA) Canada
(86) International Application No :PCT/CA2007/000091 (72)Name of Inventor :
Filing Date
:24/01/2007
1)CHAREST, PATRICK
(87) International Publication No :WO 2007/085077 2)PERRIER, MICHEL
(61) Patent of Addition to Application
Number
Filing Date
:NA
:NA
3)DONTIGNY, MARTIN
4)PETITCLERC, MICHEL
5)GUERFI, ABDELBAST
(62) Divisional to Application Number :NA
6)ZAGHIB, KARIM
Filing Date
:NA
(57) Abstract :
The invention concerns particles comprising a core and a coat covering at least part of the core surface. The core consists for more
than 50% of an acidic metal oxide and the core coating is based on a polymer, preferably based on a soiled polymer with high
electrochemical stability. The particle has a solubility rate (ts), in fixed time, of the metal oxide migrating towards the electrolyte, per
cycle, which is less than 5 per 10000. The particles are obtained by mixing the polymer and a metal oxide, via dry process with
addition of solvent. The electrodes constituting an electrode substrate at least partly coated with a mixture consisting of at least 40 of
those particles have remarkable electrochemical properties, in particular regarding the lifetime of batteries in which they are
incorporated.
No. of Pages : 55 No. of Claims : 47
The Patent Office Journal 24/10/2008 26107