Less than two years after publication in "Science", Emmanuel Defay's team is back with a new, equally prestigious publication in "Nature", with both authors based at LIST, a first for LIST and Luxembourg.
Finding sustainable sources of electricity is one of the great challenges of this century. In a publication entitled "Large harvested energy with non-linear pyroelectric modules", dated 12 September 2022, no less than nine LIST researchers look at energy recovery and, in particular, the production of electricity from waste heat.
"The idea is to vary the temperature of the material to recover electricity," explains Emmanuel Defay, head of the LIST's Nanotechnologies unit. Pyroelectricity is the property of a material in which a change in temperature leads to a variation in electrical polarisation. This change in polarisation can generate an electric current, which makes these materials useful, for example, for electricity generation. "The idea of using pyroelectric materials originated in the 1980s and we have brought it up to date: we have access to better materials and understand some of the mechanisms that have allowed us to create a convincing demonstrator. Our thermal energy collector recovers 10 joules for 40 grams of material. That's 1,000 times more than we're used to seeing in the energy recovery field.
Of the 11 signatories to the publication, 9 are LIST researchers and 2 are Japanese industrial partners with whom LIST is conducting a research project.
"Among the possible applications, we can imagine manufacturing solar panels with this principle, or applying it for example in a computing centre, in heavy industry, or in the space domain. The aim now is to go further in developing a credible application by contacting companies.