Coated metal oxide particles with low dissolution rate, methods for preparing same and use thereof in electrochemical systems
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 ha...
Saved in:
Main Authors | , , , , , |
---|---|
Format | Patent |
Language | Chinese English |
Published |
25.02.2009
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | 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. |
---|---|
Bibliography: | Application Number: CN2007803328 |