Published: 13 March 2019, 15:46
Tin is an attractive electrode material for sodium ion batteries. However, the large volume expansion during charge storage usually leads to poor long-term stability, which is why carbon is important as a carrier material. In a new work of the Adelhelm working group in cooperation with scientists from Münster and Beijing, the storage behaviour of tin could be improved and investigated in more detail by a simple approach. For this purpose, a composite material based on graphite, melamine and tin was produced. The approach leads to a significantly lower volume expansion of the electrode, which greatly improves long-term stability. A closer look at the storage behaviour also revealed a surprising memory effect of tin. First author of the work is Dr. Thangavelu Palaniselvam, who has been working as a Humboldt fellow in Jena for two years.
The original work titled "Sodium Storage and Electrode Dynamics of Tin-Carbon Composite Electrodes from Bulk Precursors for Sodium-Ion Batteries" can be found here.