Protected Transition Metal Hexacyanoferrate Battery Electrode
AssigneeSharp Laboratories of America, Inc.
InventorsYuhao Lu, Jong-Jan Lee, David Evans
Life of this patent
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Abstract
A protected transition metal hexacyanoferrate (TMHCF) battery cathode is presented, made from AxMyFez(CN)n.mH2O particles, where the A cations are either alkali or alkaline-earth cations, and M is a transition metal. In one aspect the cathode passivation layer may be materials such as oxides, simple salts, carbonaceous materials, or polymers that form a film overlying the AxMyFez(CN)n.mH2O particles. In another aspect, the cathode passivation layer is a material such as oxygen, nitrogen, sulfur, fluorine, chlorine, or iodine that interacts with the AxMyFez(CN)n.mH2O particles, to cure defects in the AxMyFez(CN)n.mH2O crystal lattice structure. Also presented are TMHCF battery synthesis methods.
Claims26
A protected transition metal hexacyanoferrate (TMHCF) battery cathode comprising:
- a metal current collector;
- AxMyFez(CN)n.mH2O particles having a crystal lattice structure 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 in a range of 0 to 2;
- where y is in a range of 0 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 cathode passivation layer.
A transition metal hexacyanoferrate (TMHCF) battery with a protected cathode, the battery comprising:
- a cathode comprising:
- a metal current collector;
- AxMyFez(CN)n.mH2O particles having a crystal lattice structure 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 in a range of 0 to 2;
- where y is in a range of 0 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;
- a cathode passivation layer;
- an anode selected from a group consisting of an A′ metal, an A′ metal containing composite, and a material that can host A′ atoms, where A′ cations are selected from the group consisting of alkali and alkaline-earth cations, and,
- an electrolyte.
A method for synthesizing a transition metal hexacyanoferrate (TMHCF) battery material, the method comprising:
- synthesizing a AxMyFez(CN)n.mH2O powder including particles having a crystal lattice structure;
- where A cations are selected from a group consisting of alkali and alkaline,-earth cations;
- where M is a transition metal;
- where x is in a range of 0 to 2;
- where y is in a range of 0 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;
- mixing the AxMyFez(CN)n.mH2O powder with a conducting carbon and an organic binder in an organic solution, creating a mixture;
- forming the mixture on a metal current collector, creating a cathode;
- and,
- forming a cathode passivation layer overlying the cathode.
A method for synthesizing a transition metal hexacyanoferrate (TMHCF) battery material, the method comprising:
- synthesizing a AxMyFez(CN)n.mH2O powder including particles having a crystal lattice structure;
- where A cations are selected from a group consisting of alkali and alkaline-earth cations;
- where M is a transition metal;
- where x is in a range of 0 to 2;
- where y is in a range of ( )to 2;
- where z is in a range of 0.1 to 2;
- where n is in a range of 1 to 6;
- where in is in a range of 0 to 7;
- treating the AxMyFez(CN)n.mH2O powder with a passivation material;
- mixing passivation-treated AxMyFez(CN)n.mH2O powder with a conducting carbon and an organic hinder in an organic solution, creating a mixture;
- and,
- forming the mixture on a metal current collector, to create a protected cathode.
Dependencies are inferred from the claim text.