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Current issue

ELEKTRO 12/2017 was released on December 6th 2017. Its digital version will be available on January 5th 2018.

Topic: Measurement, measuring devices and engineering; Testing and diagnostics

Main Article
Measurements on rotating machines using SFRA method
Application possibilities of ultra-capacitors or LiFePO4 batteries in trolley network of the Brno Public Transit Company

SVĚTLO (Light) 6/2017 was released on December 11th 2017. Its digital version will be available on january 11th 2018.

Lighting installations
The lighting of university building Centrale Supélec in Saclay in France
The light for our future

Daylight
Application and judgment light guides Solatube®

Storing electricity in paper

04.12.2015 | Linköping University | www.liu.se

Researchers at Linköping University’s Laboratory of Organic Electronics, Sweden, have developed power paper – a new material with an outstanding ability to store energy. The material consists of nanocellulose and a conductive polymer.

One sheet, 15 centimetres in diameter and a few tenths of a millimetre thick can store as much as 1 F, which is similar to the supercapacitors currently on the market. The material can be recharged hundreds of times and each charge only takes a few seconds.

Storing electricity in paper

It’s a dream product in a world where the increased use of renewable energy requires new methods for energy storage – from summer to winter, from a windy day to a calm one, from a sunny day to one with heavy cloud cover.

The structural foundation of the material is nanocellulose, which is cellulose fibres which, using high-pressure water, are broken down into fibres as thin as 20 nm in diameter. With the cellulose fibres in a solution of water, an electrically charged polymer (PEDOT:PSS), also in a water solution, is added. The polymer then forms a thin coating around the fibres.

The new cellulose-polymer material has set a new world record in simultaneous conductivity for ions and electrons, which explains its exceptional capacity for energy storage. It also opens the door to continued development toward even higher capacity. Unlike the batteries and capacitors currently on the market, power paper is produced from simple materials – renewable cellulose and an easily available polymer. It is light in weight, it requires no dangerous chemicals or heavy metals and it is waterproof.

Read more at Linköping University

Image Credit: Linköping University

-jk-