Design of hybrid methods of structure modification and innovative protective layers manufacturing ensuring chemical stability and corrosion protection of novel, highly effective thermoelectric materials for energy conversion


                

Project manager:

Realised by:

Grant no.:

  • UMO-2016/21/B/ST8/00409

Start date:

  • 2017-01-25

End date:

  • 2021-01-24

The aim of the project is to develop innovative ways to improve chemical stability (maintaining unchanged chemical  and  phase  composition)  of  selected  thermoelectric  materials  belonging  to  different  groups: skutterudites  (CoSb3 based), silicides  (Mg2Si  based)  and  sulfides  (Cu2S  based)  and  to  protect  them  against high temperature corrosion (oxidation) through selective doping and use of protective coatings  and surface engineering,  aided  by  advanced  tools  for  theoretical  modeling  (verified  and  controlled  by  experimental studies).  Limiting  the  adverse  effects  of  diffusion  and  microstructure  reconstruction  will  be  possible  by appropriate modification of chemical composition and selection of doping elements, allowing to obtain very good  transport  properties  while  maintaining  their  chemical  stability.  For  protection  against  corrosion amorphous  protective  layers  based  on  so  called  black  glass  (SiOC - silicon  oxycarbide  glass)  as  well  as passivation  layers  will  be  used,  which  should  significantly  inhibit  negative  oxidation  processes.  A  support for  experimental  studies  from  advanced  theoretical  computer  simulations  of  observed  phenomena  and materials  properties  using  high  performance  supercomputers  will  allow  significant  reduction  of  materials costs  as  well  as  time  necessary  to  design  appropriate  modifications  of  both,  thermoelectric  materials  and protective layers.