Metal-doped transition metal hexacyanoferrate (TMHCF) battery electrode

摘要

A method is provided for synthesizing a metal-doped transition metal hexacyanoferrate (TMHCF) battery electrode. The method prepares a first solution of AxFe(CN)6 and Fe(CN)6, where A cations may be alkali or alkaline-earth cations. The method adds the first solution to a second solution containing M-ions and M′-ions. M is a transition metal, and M′ is a metal dopant. Subsequent to stirring, the mixture is precipitated to form AxMcM′dFez(CN)n.mH2O particles. The AxMcM′dFez(CN)n.mH2O particles have a framework and interstitial spaces in the framework, where M and M′ occupy positions in the framework. Alternatively, the method prepares AaA′bMyFez(CN)n.mH2O particles. A and A′ occupy interstitial spaces in the AaA′bMyFez(CN)n.mH2O particle framework. A metal-doped TMHCF electrode is also provided.

主权项

1. A metal-doped transition metal hexacyanoferrate (TMHCF) battery electrode, prior to assembly in a battery and being subjected to charge/discharge cycling, the electrode comprising;
a metal current collector; AxMyFez(CN)n.mH2O particles overlying the current collector;
where A cations are selected from a group consisting of alkali and alkaline-earth cations;where M is a transition metal;where x is less than or equal to 2;where y is less than or equal to 2;where z is in a range of 0.1 to 2;where n is in a range of 1 to 6;where m is in a range of 0 to 7; and, a metal dopant modifying the AxMyFez(CN)n.mH2O particles to form particles, having a framework and interstitial spaces in the framework, selected from a group consisting of AaA′bMyFez(CN)n.mH2O and AcMyM′d(CN)n.mH2O, where A′ and M′ are metal dopants; where A and A′ occupy interstitial spaces; where b is less than or equal to 1; where “a” is less than or equal to 2; where M and M′ occupy positions in the framework; where d is less than or equal to 1; and, where c is less than or equal to 2.