The invention relates to an activation device for an electric battery unit, in particular, for a battery part of a torpedo. The invention also relates to a battery unit with activation devices of this type. An activation device incorporates an operating supply connection, to which an operating supply reservoir can be connected. A movably arranged cutting element can be pneumatically actuated via a pneumatic connection of the activation device by means of an actuation element, wherein a sealing element arranged in the path of travel of the cutting element controls the operating supply connection. In order to guarantee a safe storage, ready for operation, and a safe activation of a battery unit, it is provided in accordance with the invention that the activation device incorporates a pneumatic outlet, which can be fluidically connected to the pneumatic connection, depending on the position of the actuation element.

Methods and apparatus to form biocompatible energization elements are described. In some embodiments, the methods and apparatus to form the biocompatible energization elements involve forming cavities comprising active cathode chemistry. The active elements of the cathode and anode are sealed with a laminate stack of biocompatible material. In some embodiments, a field of use for the methods and apparatus may include any biocompatible device or product that requires energization elements.

Methods and apparatus to form biocompatible energization elements are described. In some embodiments, the methods and apparatus to form the biocompatible energization elements involve forming cavities comprising active cathode chemistry. The active elements of the cathode and anode are sealed with a laminate stack of biocompatible material. In some embodiments, a field of use for the methods and apparatus may include any biocompatible device or product that requires energization elements.

An apparatus including a first electrode, a second electrode and an electrolyte, the first electrode including graphene oxide and configured to generate protons in the presence of water to produce a potential difference between the first and second electrodes, the electrolyte configured to enable the generated protons to flow from the first electrode to the second electrode when the first and second electrodes are connected by an external circuit, wherein the electrolyte includes a room-temperature ionic fluid configured to absorb water from the surrounding environment and deliver said water to the first electrode to facilitate the generation of protons.

An apparatus including a first electrode, a second electrode and an electrolyte, the first electrode including graphene oxide and configured to generate protons in the presence of water to produce a potential difference between the first and second electrodes, the electrolyte configured to enable the generated protons to flow from the first electrode to the second electrode when the first and second electrodes are connected by an external circuit, wherein the electrolyte includes a room-temperature ionic fluid configured to absorb water from the surrounding environment and deliver said water to the first electrode to facilitate the generation of protons.

A method including a deposition step comprising depositing a layer of graphene oxide; a deposition step including selectively exposing a region of the deposited graphene oxide layer to electromagnetic radiation to form a region of reduced graphene oxide adjacent to a neighbouring region of unexposed graphene oxide, the graphene oxide and adjacent reduced graphene oxide regions forming a junction therebetween to produce a graphene oxide-reduced graphene oxide junction layer; and repeating the deposition and exposure steps for one or more further respective layers of graphene oxide, over an underlying graphene oxide-reduced graphene oxide junction layer, to produce an apparatus in which the respective junctions of the graphene oxide-reduced graphene oxide layers, when considered together, extend in the third dimension.

Methods and apparatus to form biocompatible energization elements are described. In some embodiments, the methods and apparatus to form the biocompatible energization elements involve forming cavities comprising active cathode chemistry. The active elements of the cathode and anode are sealed with a laminate stack of biocompatible material. In some embodiments, a field of use for the methods and apparatus may include any biocompatible device or product that requires energization elements.

An apparatus including a first electrode including a substantially homogeneous mixture of graphene oxide and a proton conductor; a second electrode including reduced graphene oxide; and spaced-apart charge collectors for the respective first and second electrodes, wherein the first and second electrodes extend from their respective charge collectors towards one another to form a junction at an interface there between, and wherein 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.

An apparatus including a first electrode including a substantially homogeneous mixture of graphene oxide and a proton conductor; a second electrode including reduced graphene oxide; and spaced-apart charge collectors for the respective first and second electrodes, wherein the first and second electrodes extend from their respective charge collectors towards one another to form a junction at an interface there between, and wherein 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.

Methods and apparatus to form biocompatible energization elements are described. In some examples, the methods and apparatus to form the biocompatible energization elements involve forming cavities comprising active cathode chemistry. The active elements of the cathode and anode are sealed with a biocompatible material. In some examples, a field of use for the methods and apparatus may include any biocompatible device or product that requires energization elements.