Scientists in Spain have carried out a comparative survey of different electrolytes prepared using several different solvents and in combination with different Na salts, namely NaClO4, NaPF6 and NaTFSI.
They found that NaPF6 in ethylene carbonate:propylene carbonate is the best electrolyte for performance and it fulfils all present safety considerations.
With this electrolyte, the team achieved capacities of ca. 200mAh/g and over 180 cycles.
Read the EES ‘HOT’ article today:
In search of an optimized electrolyte for Na-ion batteries
Alexandre Ponrouch, Elena Marchante, Matthieu Courty, Jean-Marie Tarascon and M. Rosa Palacín
Energy Environ. Sci., 2012, DOI: 10.1039/C2EE22258B,
