Volume 89 Issue 16 | p. 36 | Concentrates
Issue Date: April 18, 2011

Ion Migration In Electrodes Revealed

Fluorosulfate materials reveal differences in Na+ and Li+ movement, a finding that could improve rechargeable batteries
Department: Science & Technology
Keywords: battery, lithium-ion battery, cathode, electrode

In a family of fluorosulfate materials of interest for rechargeable battery cathodes, higher calculated activation energies for sodium-ion movement in NaFeSO4F 
compared with lithium-ion movement in LiFeSO4F help explain the poor performance of NaFeSO4F as an electrode material (Chem. Mater., DOI: 10.1021/cm200683n). A better understanding of the differences between sodium- and lithium-based materials could point the way to development of sodium-based cathodes, reducing pressure on global lithium supplies. Linda F. Nazar . . .

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