Abstract: A battery cell including: an anode configured to operate as a source of cations during discharge of the battery cell; and an electrolyte configured to transport the cations from the anode to the a cathode during discharge of the battery cell, wherein the cathode includes material that is configured to enable the reversible insertion of transported cations during discharge of the battery cell and that has optical properties that are dependent upon cation insertion and that is viewable by a user.

Abstract: An electrode comprises graphene, titanium dioxide and a binder, the binder configured to facilitate the binding together of the graphene and titanium dioxide to form the electrode.

Abstract: A trap Including: an inlet configured to receive a fluid conveying nanostructures; ionic liquid configured to trap the nanostructures; and an outlet for the fluid.

Abstract: A battery cell including: an anode configured to operate as a source of cations during discharge of the battery cell; and an electrolyte configured to transport the cations from the anode to the a cathode during discharge of the battery cell, wherein the cathode includes material that is configured to enable the reversible insertion of transported cations during discharge of the battery cell and that has optical properties that are dependent upon cation insertion and that is viewable by a user.

Abstract: An input device (1, 25) for a user interface comprises means to monitor movement of a user by mapping and recording deformations of their skin. The input device (1, 25) comprises conformable/reversibly stretchable material for placement onto the skin of a user. A plurality of sensors (30) are mounted on, or embedded in, the stretchable material and arranged to undergo, and track in-plane and out-of-plane deformations corresponding to stretching and flexure of the underlying skin. A signal for controlling another device (26) is then generated, based on the detected movement, gesture or positioning of the user based on the detected deformations. In wearable electronics applications, the other device may be mounted on the same stretchable material. The sensors (30) may be arranged to provide active feedback, by selectively applying vibrations or pressure to the user's skin.