Patent ID: 9502185
Filing Date: 2016-11-22
CPC Classification: H01G,Y02E,Y10T

Claim Text:
1. An asymmetric supercapacitor comprising: a) at least one positive electrode comprising a nickel-based hydroxide and one nickel-based current collector; b) at least one negative electrode comprising a continuous current collector wherein 50% or more of the surface of said collector exhibits a roughness Ra1 comprised between 0.8 and 15 μm, measured for a base length comprised between 2 and 200 μm, said collector being coated with a mixture comprising: the negative electrode being obtained by a process comprising the steps of: c) an alkaline electrolyte; d) at least one separator the negative electrode being charged by a non-Faradic process whereby ion accumulation at the electrolyte/electrode interface forms a double layer where a first layer is made up by accumulation of the electrolyte cations adsorbed at the active carbon surface and a second layer is made up by accumulation of electrons in the active carbon, wherein the binder of the negative electrode does not contain any polytetrafluoroethylene (PTFE).