Two free reports, authored by Electrosciences Ltd, for the UK’s Knowledge Transfer Network, are available online:
Report on the rectification of harvested energy in vibrational energy harvesting materials technologies: Materials, power systems design and electronic engineering issues.
Report: New Materials for Transduction and Storage.
To be able to download these reports, you will need to be registered on the KTN website. It’s simple, and quick to do this and the website does contain a great deal of useful information, contacts and resources in many technology areas.