A portable battery-powered electronic device including a battery a microprocessor and a display screen is provided. The device is characterised in that it further includes an integral rechargeable battery-charging unit connected to the battery comprising: a supercapacitor comprised of one or more sheets of graphene ...

The present invention provides a supercapacitor assembly which is characterised by comprising: a supercapacitor comprised of carbon-containing anode(s) and cathode(s), intermediate porous membrane(s) and an ionic liquid electrolyte; an electrical heater for heating the supercapacitor; and a thermostat for controllin...

A method of reducing outgassing in a supercapacitor comprised of carbon-containing electrodes and at least one ionic liquid is characterised by the steps of (a) contacting the carbon-containing electrodes with a tetrafluoroborate salt; (b) applying a potential difference across the carbon- containing electrodes whil...

An electrical device is provided. It is characterised by comprising: • at least one operative element for performing the assigned duty of the device; • a supercapacitor comprised of nano-carbon containing electrodes an ionic liquid electrolyte and an ion-permeable membrane for powering the operative element and/or r...

An energy-storage device is provided. It includes a charge-storing supercapacitor cell comprised of electrodes at least one of which includes a nano-carbon component a ion- permeable membrane and an electrolyte characterised in that the cell is embedded or encapsulated in a flexible or rigid matrix. ...

A system for delivering electrical energy to a chargeable unit of an electrically powered object characterised by comprising: • at least one input line for delivering electricity from a grid and/or a source of renewable electrical energy; • optionally a first converter disposed within the input line(s) for convertin...

A self-supporting supercapacitor electrode adapted for attachment to an electrical circuit characterised by comprising a rigid or mechanically resilient, electrically-conductive sheet consisting essentially of a matrix of from 70-90% by weight of activated carbon and 5 to 25% by weight conductive carbon uniformly di...

A device for harvesting and storing triboelectric charge generated on an exterior surface of a moving vehicle is provided. It is characterised by comprising; • a supercapacitor comprised of nano-carbon-containing electrodes; an ionic liquid electrolyte and at least one ion-permeable porous membrane; • at least one f...