Patent ID: 9384903
Filing Date: 2016-07-05
CPC Classification: H01G,Y02E

Claim Text:
1. An energy storage device comprising: at least one porous structure, wherein the porous structure contains multiple channels, each one of which has an opening to a surface of the porous structure, wherein: each one of the channels has a first end having a first average width and a second end having a second average width, with the first end being located where the channel opens to the surface of the porous structure and the second end being located at a distance from the first end as measured along a length of the channel; and for at least some of the channels, the first average width is larger than the second average width, at least some of the channels comprise one or more divots in a sidewall of the channel; and the divots have an average size that exceeds an average size of an ion in an electrolyte contained in the channel by no more than 0.5 nanometers.