Primary alkaline battery
View Patent ↗A primary battery includes a cathode having a non-stoichiometric metal oxide including transition metals Ni, Mn, Co, or a combination of metal atoms, an alkali metal, and hydrogen; an anode; a separator between the cathode and the anode; and an alkaline electrolyte.
1. A battery, comprising:
a cathode comprising an oxide having a formula A 1−x H y M a 1−z−t M b z M c t O 2 ;
an anode;
a separator between the cathode and the anode; and
an alkaline electrolyte, wherein
A is an alkali metal,
M a and M b are transition metals,
M c is a dopant,
x and y are each independently from about 0.1 to about 0.9,
z is independently from about 0.05 to about 0.95,
t is independently from about 0.95 to about 0.05,
y is less than or equal to x, and
z+t is between 0 and 1.
2. The battery of claim 1 , wherein the transition metal is selected from the group consisting of Ni, Co, Mn, Fe, and combinations thereof.
3. The battery of claim 1 , wherein the alkali metal is selected from the group consisting of Li, Na, K, Cs, Rb, and combinations thereof.
4. The battery of claim 1 , wherein the dopant is selected from the group consisting of Mg, Ca, Ba, Al, Cr, Y, Zr, Nb, Hf, Ti, and combinations thereof.
5. The battery of claim 1 , wherein the oxide is selected from the group consisting of Li 1−x H y NiO 2 , Li 1−x H y CoO 2 , Li 1−x H y Ni 1−z Co z O 2 , and Li 1−x H y Ni 1−z−t Co z Al t O 2 .
6. The battery of claim 5 , wherein Ni has an average oxidation state of greater than +3.
7. The battery of claim 5 , wherein Co has an average oxidation state of greater than +3.
8. The battery of claim 1 , wherein the anode comprises zinc or a zinc alloy.
9. The battery of claim 1 , wherein the electrolyte comprises lithium hydroxide, sodium hydroxide, or potassium hydroxide.
10. The battery of claim 1 , wherein the oxide comprises an oxide including an electrically conductive surface coating comprising a material selected from the group consisting of graphite, carbon black, acetylene black, manganese dioxide, cobalt oxide, cobalt oxyhydroxide, silver oxide, silver nickel oxide, nickel oxyhydroxide, and indium oxide.
11. The battery of claim 1 , wherein the cathode further includes a second cathode active material selected from the group consisting of electrolytic manganese dioxide, chemically-prepared manganese dioxide, acid-treated electrolytic manganese dioxide, acid-treated chemically-prepared manganese dioxide, and combinations thereof.