Hou, J.; Zhang, Z.; Preis, W.; Sitte, W.; Dehm, G.: Electrical properties and structure of grain boundaries in n-conducting BaTiO3 ceramics. Journal of the European Ceramic Society 31 (5), pp. 763 - 771 (2011)
If manganese nodules can be mined in an environmentally friendly way, the critical metals needed for the energy transition could be produced with low CO2 emissions