Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 8, Issue 10, Pages 3000-3005Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ee02274f
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Funding
- Robert A. Welch Foundation [F-1066]
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The mineral eldfellite, NaFe(SO4)(2), is characterized as a potential cathode for a Na-ion battery that is fabricated in charged state; its 3 V discharge versus sodium for reversible Na+ intercalation is shown to have a better capacity, but lower insertion rate than Li+ intercalation. The theoretical specific capacity for Na+ insertion is 99 mA h g(-1). After 80 cycles at 0.1C versus a Na anode, the specific capacity was 78 mA h g(-1) with a coulomb efficiency approaching 100%.
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