Teknologian Tutkimuskeskus Vtt Oy

Teknologian Tutkimuskeskus Vtt

Jouni Ahopelto

Mika Prunnila

Markus Linder

Andrey Timofeev

Kestutis Grigoras

Leif Grönberg

Grigoras Kestutis

Andrey Shchepetov

Päivi Laaksonen

Leif GRÖNBERG

A thermoelectric device () comprising a frame (), a membrane () made of thermoelectric material, and an element () for absorbing or releasing energy. The element () is supported to the frame () solely by the membrane ().

Thermoelectric device

A blank suitable for use as a body of a supercapacitor comprises a first porous semiconductor volume and a second porous semiconductor volume, the second porous semiconductor volume laterally surrounded by the first porous semiconductor volume and separated from it by a trench that is suitable for receiving an electrolyte, whereby the first and second porous semiconductor volume comprise channels opening to the trench. A supercapacitor comprises a body formed by using the blank according to any one of the preceding claims, so that the first porous semiconductor volume acts as one electrode and the second porous semiconductor volume acts as another electrode, with an electrolyte in the trench.

Blank suitable for use as a body of a supercapacitor, a supercapacitor, and a method of manufacturing a porous silicon volume

An integrable electrochemical capacitor and methods for manufacturing the same are disclosed. The electrochemical capacitor comprises a first electrode comprising a first rigid piece having a first porous portion, a second electrode comprising a second rigid piece having a second porous portion, and an electrolyte in contact with the first porous portion and the second porous portion. The structure allows the electrochemical capacitor to be manufactured without a separator film between the electrodes and is compatible with semiconductor manufacturing technologies. The electrochemical capacitor can also be manufactured within a SOI layer

Electrochemical capacitor and semiconductor chip having an electrochemical capacitor

This document describes graphene-containing platelets and methods of exfoliating graphene from a surface. The method comprises facilitating exfoliation by treatment with proteins. In an embodiment, the proteins adhere to the surface of graphene and then the produced platelets may contain a graphene layer and a protein layer on the surface of the graphene layer. Electronic devices containing such platelets are also described.

Graphene-containing platelets and electronic devices, and method of exfoliating graphene

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Espoo, Finland

Jouni Ahopelto