Sodium iron(II)-hexacyanoferrate(II) battery electrode and synthesis method

Patent · Tue Sep 20 04:00:00 EDT 2016

OSTI ID:1531947

Lu, Yuhao; Vail, Sean Andrew

A method is provided for synthesizing sodium iron(II)-hexacyanoferrate(II). A Fe(CN)6 material is mixed with the first solution and either an anti-oxidant or a reducing agent. The Fe(CN)6 material may be either ferrocyanide ([Fe(CN)6]4−) or ferricyanide ([Fe(CN)6]3−). As a result, sodium iron(II)-hexacyanoferrate(II) (Na1+XFe[Fe(CN)6]Z.MH2O is formed, where X is less than or equal to 1, and where M is in a range between 0 and 7. In one aspect, the first solution including includes A ions, such as alkali metal ions, alkaline earth metal ions, or combinations thereof, resulting in the formation of Na1+XAYFe[Fe(CN)6]Z.MH2O, where Y is less than or equal to 1. Also provided are a Na1+XFe[Fe(CN)6]Z.MH2O battery and Na1+XFe[Fe(CN)6]Z.MH2O battery electrode.

• Research Organization: Sharp Laboratories of America, Inc., Camas, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AR0000297
• Assignee: Sharp Laboratories of America, Inc. (Camas, WA)
• Patent Number(s): 9,450,224
• Application Number: 14/067,038
• OSTI ID: 1531947
• Country of Publication: United States
• Language: English