Mastering the energy mix by 2050 and beyond is an important international challenge that leads to major research and specific equipment needs. In this context, CNRS (France) wish to pursue its collaborative R&D activities in the field of clean and sustainable energy by developing renewable energies (RES) and its storage, by generating new and efficient materials for emerging technologies such as advanced batteries, hydrogen and CO2 conversion. CNRS offers several international cooperation instruments such as International Research Projects (IRP) , International Research Network (IRN) and recently International Research Centres, with the aim to strengthen collaborations through short- and medium-term scientific exchange, in addition to organising working meetings or seminars, developing joint research activity including field research, and supervising students.