Metal-doped nickel oxide active materials
View Patent ↗A primary battery includes a cathode having an alkali-deficient nickel oxide including metals such as Ca, Mg, Al, Co, Y, Mn, and/or non-metals such as B, Si, Ge, or a combination of metal and/or non-metal atoms; a combination of metal atoms; an anode; a separator between the cathode and the anode; and an alkaline electrolyte.
1. A battery comprising an anode including zinc or zinc alloy particles, an aqueous alkaline electrolyte solution, a separator, and a cathode comprising a cathode active material having a formula A x Ni 1-y-z-w Co y M a z M b w O 2 , wherein
A is an alkali metal,
M a is a metal dopant,
M b is a non-metal dopant,
0≦x≦0.08,
w is 0, or 0<w≦0.02 and
0.02≦y+z≦0.25
wherein M a is selected from the group consisting of Ca, Mg, Al, Y, Mn, and any combination thereof and M b is selected from the group consisting of B, Si, Ge, and any combination thereof.
2. The battery of claim 1 , wherein Ni has an average oxidation state of greater than +3.25.
3. The battery of claim 1 , wherein the electrolyte comprises lithium hydroxide, sodium hydroxide, or potassium hydroxide.
4. The battery of claim 1 , wherein the cathode active material has a low-rate capacity of at least 350 mAh/g after storing for 24 hours at 25° C.
5. The battery of claim 1 , wherein the cathode active material has a low rate capacity of at least 340 mAh/g after storing for one week at 25° C.
6. The battery of claim 1 , wherein the cathode active material has a low rate capacity of at least 300 mAh/g after storing for one week at 45° C.
7. The battery of claim 1 , wherein the battery has a capacity retention of at least 95 percent after storing for one week at 25° C.
8. The battery of claim 1 , wherein the battery has a capacity retention of at least 85 percent after storing for one week at 45° C.
9. The battery of claim 1 , wherein the cathode active material has an open circuit voltage of from 1.75 to 1.85 V.
10. The battery of claim 1 , wherein the cathode active material has an oxygen evolution after storing for three weeks at 25° C. of less than 4 cm 3 /g.
11. The battery of claim 1 , wherein y is 0 or 0.02≦y≦0.15.
12. The battery of claim 1 , wherein z is 0 or 0.02≦z≦0.08.
13. The battery cathode of claim 1 , wherein the alkali metal is selected from the group consisting of Li, Na, K, Cs, Rb, and any combination thereof.
14. The battery of claim 1 , wherein the cathode active material further comprises protons at a stoichiometric ratio of between 0.02 and 0.2.
15. The battery of claim 1 , wherein the cathode active material is selected from the group consisting of Li x Ni 1-y Co y O 2 , Li x Ni 1-z Ca z O 2 , Li x Ni 1-y-z Co y Ca z O 2 , Li x Ni 1-z Mg z O 2 , Li x Ni 1-y-z Co y Mg z O 2 , Li x Ni 1-z Al z O 2 , and Li x Ni 1-y-z Co y Al z O 2 , Li x Ni 1-z (Mg, Al) z O 2 , Li x Ni 1-y-z Co y (Mg, Al) z O 2 , Li x Ni 1-z Y z O 2 , Li x Ni 1-y-z Co y Y z O 2 , Li x Ni 1-z Mn z O 2 , and Li x Ni 1-y-z Co y Mn z O 2 .