CNRS chemists synthesized and studied new compositions of materials for positive electrodes of sodium-ion batteries that constitute a sustainable alternative to lithium-ion batteries. These new electrodes have an increased energy density. A scientific advance recently published in the journal Nature Materials.
Faced with the growing demand for energy storage systems, high-performance lithium-ion batteries have become unbeatable on the market. However, their environmental impact and the uneven distribution of lithium resources raise questions. Their “cousins”, sodium-ion batteries, seem to be a promising alternative given the abundance and more homogeneous distribution of sodium. The various possible electrode materials are thus the subject of numerous studies to increase their performance, power and energy densities. In particular, NaSICON (sodium super ionic conductor) type materials composed of sodium, vanadium and phosphate are attracting keen interest as positive electrode materials because they have a particularly robust crystalline structure.
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