▎ 摘　　要

NOVELTY - Apparatus (201) comprises a first electrode (202) comprising a substantially homogeneous mixture of graphene oxide and a proton conductor; a second electrode (203) comprising reduced graphene oxide; and spaced-apart charge collectors (207) for the respective first and second electrodes. The first and second electrodes extend from their respective charge collectors towards one another to form a junction (206) at an interface, and the substantially homogeneous mixture of the first electrode is configured to be sufficiently hydrophobic. USE - The apparatus is useful as an electronic device, a portable electronic device, a portable telecommunications device, a mobile phone, a tablet, a phablet, a personal digital assistant, a laptop computer, a desktop computer, a smartphone, a smartwatch, smart eyewear, a proton battery, a humidity sensor, or a module (claimed). ADVANTAGE - The ability to limit intermixing of the electrode materials enables the respective charge collectors to be positioned closer together to reduce the size, and increase the electrical storage density, of the apparatus. DETAILED DESCRIPTION - Apparatus (201) comprises a first electrode (202) comprising a substantially homogeneous mixture of graphene oxide and a proton conductor; a second electrode (203) comprising reduced graphene oxide; and spaced-apart charge collectors (207) for the respective first and second electrodes. The first and second electrodes extend from their respective charge collectors towards one another to form a junction (206) at an interface, and the substantially homogeneous mixture of the first electrode is configured to be sufficiently hydrophobic to prevent intermixing of the homogeneous mixture with the reduced graphene oxide of the second electrode in proximity to one or both of the respective charge collectors to prevent short circuiting of the spaced-apart charge collectors. INDEPENDENT CLAIMS are included for: (1) a substantially homogeneous mixture of graphene oxide and a proton conductor for use as a first electrode of an apparatus, where the apparatus comprises the first electrode, a second electrode comprising reduced graphene oxide; and spaced apart charge collectors for the respective first and second electrodes, where the first and second electrodes extend from their respective charge collectors towards one another to form a junction at an interface, and where the substantially homogeneous mixture of the first electrode is configured to be sufficiently hydrophobic to prevent intermixing of the homogeneous mixture with the reduced graphene oxide of the second electrode in proximity to one or both of the respective charge collectors to prevent short circuiting of the spaced apart charge collectors; (2) a method which involves mixing graphene oxide with a proton conductor to form a substantially homogeneous mixture for use as a first electrode of an apparatus, where the apparatus comprises the first electrode, a second electrode comprising reduced graphene oxide; and spaced apart charge collectors for the respective first and second electrodes, where the first and second electrodes extend from their respective charge collectors towards one another to form a junction at an interface, and where the substantially homogeneous mixture of the first electrode is configured to be sufficiently hydrophobic to prevent intermixing of the homogeneous mixture with the reduced graphene oxide of the second electrode in proximity to one or both of the respective charge collectors to prevent short circuiting of the spaced apart charge collectors; (3) a method which involves depositing first and second electrodes for use with respective spaced-apart charge collectors, the first electrode comprising a substantially homogeneous mixture of graphene oxide and a proton conductor, the second electrode comprising reduced graphene oxide, where the first and second electrodes are deposited to extend from their respective charge collectors towards one another to form a junction at an interface, and where the substantially homogeneous mixture of the first electrode is configured to be sufficiently hydrophobic to prevent intermixing of the homogeneous mixture with the reduced graphene oxide of the second electrode in proximity to one or both of the respective charge collectors to prevent short circuiting of the spaced-apart charge collectors; and (4) a computer program comprising computer code configured to perform the method above. DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the apparatus. Apparatus (201) First electrode (202) Second electrode (203) Junction (206) Spaced-apart charge collectors (207)