Patent ID: 8901024
Filing Date: 2014-12-02
Classification: H01G,H01L,H01M,Y02E,Y02P

Abstract:
1. A method comprising: providing a material comprising carbon nanotubes; exposing the material to ozone for about 1 minute to about 50 minutes to form an ozone-exposed material; and providing an electrochemical device comprising a cathode comprising a substantially transparent film comprising the ozone-exposed material, wherein the cathode does not include a platinum catalyst, wherein the film has a transmittance at about 550 nm of about 70% to about 98%; wherein the exposing the material to ozone increases the surface defect density of the material sufficiently such that the catalytic activity, as measured as (1/charge transfer resistance), of the cathode comprising the ozone-exposed material is at least about 1.5 times greater than the catalytic activity, as measured as (1/charge transfer resistance), of a corresponding cathode comprising the material before ozone exposure.