Printed Solar Bio-Batteries Led by biotechnologist Marin Sawa, a group of researchers at Imperial College London have devised a…
Printed Solar Bio-Batteries
Led by biotechnologist Marin Sawa, a group of researchers at Imperial College London have devised a way to print solar cells onto paper. They use an inkjet printer to place a conductive layer of carbon nanotubes and a layer of living cyanobacteria to create devices which can capture and store solar energy.
In their proof-of-concept experiment, the cyanobacteria survived the printing process and were able to produce energy from photosynthesis. The trial panel was palm sized and gave enough energy to power a small LED light. Even better, being little more than paper, carbon, and bacteria, the bio-cells are fully biodegradable.
The work is part of an emerging field of science called microbial biophotovoltaics (presumably related to the biovoltaics I’ve mentioned here before) which uses algae and cyanobacteria to generate energy. The energy generated may be small, but it’s also cheap and easy to manufacture, and the microbes can continue generating electricity after dark, using compounds made during daylight.
The bio-batteries aren’t intended to replace standard photovoltaics for large scale energy production. Instead, they can provide an inexpensive and renewable source of energy for specific uses, such as air quality monitors and healthcare applications.
“Imagine a paper-based, disposable environmental sensor disguised as wallpaper, which could monitor air quality in the home. When it has done its job it could be removed and left to biodegrade in the garden without any impact on the environment.”
– Marin SawaOkay, this is cool, especially on the “cheap and biodegradable electronics” angle.