%0 Conference Paper
%A Tietz, Frank
%T On the availability of lithium and the real advantages of sodium solid-state batteries
%M FZJ-2022-04359
%D 2022
%X When we write scientific publications, in the introduction usually a brief summary of the state of research is given together with the motivation of the work. In many publications related to battery developments a worldwide electrified scenario is mentioned, the specific work is contributing to this global challenge. In more detail, many publications related to sodium batteries justify the research work with the lower cost of sodium materials in comparison to lithium materials and the limited resources of lithium. But are these arguments really true? A brief analysis of the reserves and resources on the one hand and the global demand on the other hand tells us that there is no shortage of lithium resources. In summary, both arguments do not withstand a serious analysis of the facts [1,2]. Instead, there are real advantages that favor the development of sodium solid-state batteries rather than that of lithium solid-state batteries. These advantages are entirely related to the materials properties used in both systems. Especially the solid electrolytes used and their ionic conductivities have to be mentioned here as well as the properties of the alkali metals as anodes. Whereas the lithium thiophosphates are the most promising group of materials for composite cathodes and electrolytes, these materials also suffer from low thermodynamic stability making protective coatings necessary. For sodium batteries, NaSICON and ß-aluminas show similarly high ionic conductivity, but a much better thermodynamic stability. In contact with metallic sodium these materials seem to be stable. In addition, the high self-diffusion coefficient of sodium makes the application of sodium solid-state batteries very feasible due to the accessible high current densities leading to high specific and energy densities as well as fast charging. [1] C. Vaalma, D. Buchholz, M. Weil, S. Passerini, Nat. Rev. Mater. 3, 18013 (2018) [2] R. U., Y. Lu, J. Popovic, M. Law, P. Balaya, Y.-S. Hu, J. Maier, Nat. Rev. Mater. 6, 1020-1035 (2021)
%B 18th International Conference on Diffusion in Solids and Liquids
%C 27 Jun 2022 - 1 Jul 2022, Florence (Italy)
Y2 27 Jun 2022 - 1 Jul 2022
M2 Florence, Italy
%F PUB:(DE-HGF)6
%9 Conference Presentation
%U https://juser.fz-juelich.de/record/911033